Help please
i suck at math :/
thank you so much

Help Pleasei Suck At Math :/thank You So Much

Answers

Answer 1

Answer:

∠1 + ∠2 = 135°

Step-by-step explanation:

From the text, it is given that the two unknows are adjacent angles.

∠2x + ∠2x + 7 = 135°

∠4x + 7 = 135°

∠4x = 128°

x = 32

Answer 2

Answer:

[tex]\angle 1 = 64[/tex]°

[tex]\angle 2 = 71[/tex]°

Step-by-step explanation:

If two adjacent angles form at a resulting angle, this means that both angles form the full resulting angle.

This means [tex]\angle1[/tex] and [tex]\angle2[/tex] have a sum of [tex]135[/tex]°. This can also be written as:

[tex]135 = 2x+2x+7[/tex] or [tex]135 = 4x+7[/tex]

This can be worked out using simple rearrangement:

[tex]135 = 4x+7\\=135-7 = 4x\\=128 = 4x\\\therefore x = 32[/tex]

Therefore we can simply substitute to get our angles:

[tex]\angle 1 = 2x = 32\times2 = 64\\\angle 2 = 2x+7 = 32\times2+7 = 71[/tex]

Hope this helps!!!


Related Questions

Mark the false statement from the graph below:
a. Vertex is (4,4).
b. The vertex is a Maximum Point.
c. Axis of symmetry is y=4.
d. X-intercepts are (2,0) and (6,0).

Answers

The statement that is NOT true is (C) The axis of symmetry is y = 4.

Someone Help please!!

Answers

first number is x value and second is why value
(x,y)
The x axis is the horizontal axis going left to right
The y axis is the vertical axis going up and down

A right triangle has a base of 6 centimeters and the height is
9 centimeters. What is the area of this triangle?

Answers

Answer:

27 cm^2

Step-by-step explanation:

Area of a triangle is B * H / 2

6 * 9 / 2 = 27

I got sick last week and missed the lessons for this math, can anybody please help me with question 27?

Answers

The answer of the given question is (a)  an additional 4 tiles are needed to surround the new perimeter. (b)  No, Percy's expression for the number of tiles is not equivalent to 4(s + 1).

What is Expression?

An expression in mathematics is a combination of numbers, variables, and operations that represents a quantity or a value. Expressions can be simple or complex, and they can be used to represent anything from a single number to a complex algebraic equation. These expressions represent a sum of two numbers, a product of a number and a variable, a difference of a number and a constant, and the square root of a number, respectively.

a. Percy's table shows the number of tiles needed to surround a square pool with sides of length 1, 2, 3, 4, and 5 feet. He has calculated that for a pool with a side length of s feet, the number of tiles needed is given by the equation N = 8 + 4(s-1). From his table, he sees that as the side length of the pool increases by 1 foot, the number of border tiles needed increases by 4. This makes sense since each side of the pool gains 1 foot in length, so an additional 4 tiles are needed to surround the new perimeter.

b. No, Percy's expression for the number of tiles is not equivalent to 4(s + 1). Percy's equation is N = 8 + 4(s-1), which simplifies to N = 4s + 4. Stella's equation is 4(s + 1), which also simplifies to 4s + 4. Therefore,  two expressions are equivalent, and they both give number of tiles needed to surround  square pool with sides of length s feet.

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how to times the 3.14 to 225

Answers

Answer:

[tex]\boxed{706.50}[/tex]

Step-by-step explanation:

You can resolve multiple decimals easily. For this, we need to treat them just like any other number. We can follow the next steps:

Ignore the decimal point, and count the total number of digits to the right of the decimal point in both numbers. Let's call this number "n" (in this case, n=2)Multiplying the two numbers together as if they were whole numbers. Put the decimal point in the product so that there are "n" digits to the right of the decimal point.

[tex]\begin{array}{l}314\times225\\ \cline{0-1}\ \ 1570\\\ \ 628\\\ 628 \\ \cline{0-1}70650\end{array}[/tex]

Finally, we apply step 3:

[tex]\therefore 3.14 \times 225= 706.50[/tex]

[tex]\text{-B$\mathfrak{randon}$VN}[/tex]

For each problem, select the best response (a) A x2 statistic provides strong evidence in favor of the alternative hypothesis if its value is A. a large positive number. OB. exactly 1.96 c. a large negative number. D. close to o E. close to 1

Answers

(a) Option A, if its value is a large positive number, statistic A x2 provides strong evidence for the alternative hypothesis.

(b) Option B, the null hypothesis that gender is not related to personal goals and the alternative hypothesis that gender is related to personal goals.

(c) Option B, the variables considered in the chi-square test for the evaluation of contingency table B are categorical variables.

(a) If the x2 statistic is a large positive number, it provides strong evidence for the alternative hypothesis. The x2 statistic is used in hypothesis testing to determine if there is a significant difference between observed and expected frequencies. Large positive values ​​indicate that the observed frequency is significantly different from the expected frequency, supporting the alternative hypothesis.

(b) The hypotheses tested in the chi-square test for the contingency table are the null hypothesis that gender is not related to personal goals and the alternative hypothesis that gender is related to personal goals. personal goals. This test determines whether there is a significant relationship between two categorical variables.

(c) The variables considered in the chi-square test used to evaluate the contingency table are categorical variables. These variables cannot be assumed to be mean or normally distributed. The chi-square test is used to analyze the relationship between two or more categorical variables, where each variable has a discrete set of categories.

Complete Question:

For each problem, select the best response (a) A x2 statistic provides strong evidence in favor of the alternative hypothesis if its value is A. a large positive number. OB. exactly 1.96 c. a large negative number. D. close to o E. close to 1. (b) A study was performed to examine the personal goals of children in elementary school. A random sample of students was selected and the sample was given a questionnaire regarding achieving personal goals. They were asked what they would most like to do at school: make good grades, be good at sports, or be popular. Each student's sex (boy or girl) was also recorded. If a contingency table for the data is evaluated with a chi-squared test, what are the hypotheses being tested? A. The null hypothesis that boys are more likely than girls to desire good grades vs. the alternative that girls are more likely than boys to desire good grades. OB. The null hypothesis that sex and personal goals are not related vs. the alternative hypothesis that sex and personal goals are related. C. The null hypothesis that there is no relationship between personal goals and sex vs. the alternative hypothesis that there is a positive, linear relationship. OD. The null hypothesis that the mean personal goal is the same for boys and girls vs. the alternative hypothesis is that the means differ. O E. None of the above. (C) The variables considered in a chi-squared test used to evaluate a contingency table A. are normally distributed. B. are categorical. C. can be averaged. OD. have small standard deviations. E. have rounding errors.

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14. Use Appropriate Tools Select and use
one of the following tools to find the
area of the rectangle: circular counters,
square-inch tiles, or rulers.
1 in.
2 in.
15.

Answers

In order to find the area of the given rectangle, we can use square-inch tiles or rulers. the area of the rectangle is 30 square inches. The length of the rectangle is 15 inches, width is 2 inches then  area of 30 square inches.

Using square-inch tiles:

We can cover the rectangle with square-inch tiles and count the total number of tiles to find the area. Each tile represents one square inch, and the area of the rectangle is equal to the number of tiles covering it. We can start by covering one side of the rectangle with tiles, and then count the number of tiles used. The length of the rectangle is 15 inches, so we need to use 15 tiles to cover one side. We can then cover the other side with the same number of tiles, which gives us a total of 30 tiles. Therefore, the area of the rectangle is 30 square inches.

Using a ruler:

We can measure the length and width of the rectangle using a ruler and then multiply the two measurements to find the area. The length of the rectangle is 15 inches, and the width is 2 inches. Multiplying these values gives us an area of 30 square inches.

Using circular counters:

Circular counters are not an appropriate tool to find the area of a rectangle because they are circular in shape and cannot cover the entire surface of the rectangle.

In conclusion, to find the area of a rectangle, we can use appropriate tools such as square-inch tiles or rulers. These tools allow us to accurately measure the length and width of the rectangle and calculate the area by counting or multiplying the measurements.

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Given the function: f(x) = 2| x−1 | − 3

• Fully explain the three transformations required to produce this function from the

parent function.

• Find at least 3 points on the function and show ALL of your work explaining how you

found the y-values. Use these three points to graph the function given.

Answers

To produce the function f(x) = 2| x−1 | − 3 from the parent function f(x) = |x|, three transformations are required.

Horizontal shift: The function is shifted horizontally by 1 unit to the right. This is done by subtracting 1 from the input value of the function. The transformation is f(x) → f(x − 1).

Vertical stretch: The function is vertically stretched by a factor of 2. This is done by multiplying the output value of the function by 2. The transformation is f(x) → 2f(x − 1).

Vertical shift: The function is vertically shifted down by 3 units. This is done by subtracting 3 from the output value of the function. The transformation is f(x) → 2f(x − 1) − 3.

To find points on the function, we can substitute different values of x into the function and calculate the corresponding y-values. For example:

When x = 0: f(0) = 2|0 − 1| − 3 = -5

When x = 1: f(1) = 2|1 − 1| − 3 = -3

When x = 2: f(2) = 2|2 − 1| − 3 = -1

Using these points, we can plot the graph of the function f(x) = 2| x−1 | − 3. The graph is a V-shaped curve with the vertex at (1,-3), opening upwards. The points we found above can be plotted on the graph as (-1,-5), (1,-3), and (2,-1).

Which of the following are roots of the polynomial function?

Answers

The roots f the following polynomial function F(x) = x3 - x2 - 5x - 3 are (A) -1 and (B) 3.

What is a polynomial function?

In an equation such as the quadratic equation, cubic equation, etc., a polynomial function is a function that only uses non-negative integer powers or only positive integer exponents of a variable.

For instance, the polynomial 2x+5 has an exponent of 1.

f(x) = anxn + anxn+1 +... + a2x2 + a1x + a0 is the formula for a polynomial. The greatest power of x in an expression is the polynomial's degree.

Polynomials of degrees 0, 1, 2, 3, and 4 are constant (non-zero) polynomials, linear polynomials, quadratics, cubics, and quartics, respectively.

So, there is only one true, positive root, according to Descartes' rule of signs. On the list, 3 is the only real number that is positive.

When dividing x3-x2-5x-3 by (x-3), we may use synthetic division to get the quotient and discover that it is x2+2x+1, which we know as (x+1)2.

As a result, 3 is a root and -1 is a root with multiplicity 2.

A and B are the options that need to be checked.

Therefore, the roots f the following polynomial function F(x) = x3 - x2 - 5x - 3 are (A) -1 and (B) 3.

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Complete question:

Which of the following are the roots of the polynomial function? Check all that apply.

F(x) = x3 - x2 - 5x - 3

The back-to-back stem-and-leaf plot shows the test scores for two classes taught by the same teacher. Compare the samples using measures of center and variation. Are the test scores significantly greater for one class than the other?

A) The median and mean for Class A are higher than those for Class B. They have equal IQRs of 70.
The median and mean for Class A are higher than those for Class B. They have equal IQRs of 70.

B) The median and mean for Class A are lower than those for Class B. They have equal IQRs of 15.
The median and mean for Class A are lower than those for Class B. They have equal IQRs of 15.

C) The median and mean for Class A are same for Class B. They have equal IQRs of 70.
The median and mean for Class A are same for Class B. They have equal IQRs of 70.

D) The median and mean for Class A are higher than those for Class B. They have equal IQRs of 15.

Please show work, I’m really struggling with this one.

Answers

Looking at the back to back stem and leaf plot for the test scores, we can tell that D) The median and mean for Class A are higher than those for Class B. They have equal IQRs of 15.

How to compare the back to back stem and leaf plots ?

The mean of Class A can be found to be :
= ( 70 + 70 + 75 + 75 + 80 + 80 + 85 + 85 + 85 + 85 + 90 + 90 + 90 + 95 + 95 + 95 + 95 + 95 + 95 + 100 + 100 + 100 ) / 22

= 92

The mean of Class B would be :

= ( 70 + 70 + 70 + 75 + 75 + 75 + 75 + 75 + 80+ 80 + 80 + 80 + 80 + 85 + 85 + 85 + 85 + 90 + 90+ 90 + 95 + 95 + 100 ) / 23

= 82

The mean of Class A is therefore larger than Class B. The IQR cannot be up to 70 given that the lowest value of 70 and the highest is 100 so the correct option is option D.

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Use a trigonometric ratio to solve for z. Round to two decimal places as necessary.

Answers

use the ratio of sin
sin(degree) = opposite/hypotenuse
plug in for opposite/hypotenuse then solve for degree

assuming that the laptop replacement times have a mean of 3.9 years and a standard deviation of 0.4 years, find the probability that 34 randomly selec

Answers

The probability that the 39 randomly-selected laptops have a mean "replacement-time" as 3.8 years or less is equal to 0.1058.

The distribution of the sample mean follows a normal distribution with mean (μ) = 3.9 years and standard deviation = σ/√n = 0.5/√39 years, where n = 39 is the sample size.

We want to find the probability that the sample mean replacement time is less than or equal to 3.8 years, which is written as : P(x' ≤ 3.8).

By using the z-score formula, we convert this to a standard normal distribution:

⇒ z = (x' - μ)/(σ/√n) = (3.8 - 3.9)/(0.5/√39) = -1.249,

Using a standard normal distribution table, the probability that a standard normal variable is less than or equal to -1.249,is approximately 0.1058,

Therefore, the required probability is approximately 0.1058.

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The given question is incomplete, the complete question is

Assuming that the laptop replacement times have a mean of 3.9 years and a standard deviation of 0.5 years, find the probability that 39 randomly selected laptops will have a mean replacement time of 3.8 years or less.

please help asap!!!!!!!!

Answers

The true statements for a concession sale at a sporting event are:

7/11 of the people who ordered a hamburger ordered French fries. 4/11 of the people who ordered French fries ordered a hamburger.6/7 of the people who ordered a hot dog ordered French fries.2/3 of the people who ordered French fries ordered a hot dog.3/7 of the people who ordered a hamburger ordered onion rings.1/3 of the people who ordered a hot dog ordered onion rings.1/2 of the people who ordered onion rings ordered a hot dog.

How to determine rates of the concession sales?

The following statements are true based on the given data:

7/11 of the people who ordered a hamburger ordered French fries. (252 hamburger orders x 7/11 = 162 orders of French fries with hamburger)

4/11 of the people who ordered French fries ordered a hamburger. (468 French fry orders x 4/11 = 168 orders of hamburgers with French fries)

6/7 of the people who ordered a hot dog ordered French fries. (216 hot dog orders x 6/7 = 186 orders of French fries with hot dog)

2/3 of the people who ordered French fries ordered a hot dog. (468 French fry orders x 2/3 = 312 orders of hot dogs with French fries)

3/7 of the people who ordered a hamburger ordered onion rings. (252 hamburger orders x 3/7 = 108 orders of onion rings with hamburger)

1/3 of the people who ordered a hot dog ordered onion rings. (324 hot dog orders x 1/3 = 108 orders of onion rings with hot dog)

4/7 of the people who ordered onion rings ordered a hamburger. (252 onion ring orders x 4/7 = 144 orders of hamburger with onion rings)

1/2 of the people who ordered onion rings ordered a hot dog. (252 onion ring orders x 1/2 = 126 orders of hot dog with onion rings)

The total number of orders for each item can be calculated by adding up the corresponding row or column totals.

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Image transcribed:

Concession sales at a sporting event are monitored, and the data is recorded in the two-way table below. Which of the following statements are true?

| French fries | Onion rings | Total

Hamburger | 252 | 144 | 396

Hot dog | 216 | 108 | 324

Total | 468 | 252 | 720

7/11 of the people who ordered a hamburger ordered French fries.

4/11 of the people who ordered French fries ordered a hamburger.

6/7 of the people who ordered a hot dog ordered French fries.

2/3 of the people who ordered French fries ordered a hot dog.

3/7 of the people who ordered a hamburger ordered onion rings.

1/3 of the people who ordered a hot dog ordered onion rings.

4/7 of the people who ordered onion rings ordered a hamburger.

1/2 of the people who ordered onion rings ordered a hot dog.

Three balls are selected from a box containing 6 blue balls and 4 yellow balls. If the ball chosen after each selection is replaced before
the next selection, draw a tree diagram and list all the possible outcomes with their respective probabilities.

Answers

The tree diagram that list all the possible outcomes with their respective probabilities is given below.

How to explain the probability

It should be noted that to solve this problem, we can use a tree diagram to represent all the possible outcomes at each step of the selection process. The tree diagram below shows the possible outcomes:

            /   B (6/10)            \   Y (4/10)

       B1 /                            \ Y1

         /                              \

    /   B (5/10)    \   Y (4/10)    /   B (6/10)    \   Y (3/10)

B2 /                  \ Y2         B2 /                  \ Y2

  /                    \           /                    \

 |   B (4/10)   \   Y (4/10)  |   B (5/10)   \   Y (3/10)

B3|                  Y3         |                  Y3

 |                     |       |                     |

  \   B (3/10)   /   Y (4/10)  \   B (4/10)   /   Y (3/10)

    \                  \      /                  \

       \                 \   /                     \

            \   B (2/10)   Y4                     B4 \   Y (2/10)

                 |                                      |

                 |                                      |

                  \   B (1/10)                          \   Y (1/10)

                         |                                     |

                         |                                     |

                          \                                    \

                              B5                                    Y5

The branches in the tree diagram represent the possible outcomes at each selection, and the probabilities are shown next to each branch.

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Price decreased by 20% a suit £180 now for £150 is this claim correct give reason for answer

Answers

The claim that the price of a suit decreased by 20% from £180 to £150 is incorrect. The actual decrease in price is about 16.7%.

The claim that the price of a suit decreased by 20% is incorrect.

A 20% decrease in price would mean that the new price is equal to 80% of the original price. So, if we take 80% of £180, we get:

0.8 x £180 = £144

Therefore, if the price of the suit decreased by 20%, the new price should be £144, not £150.

This means that the claim is incorrect and the price of the suit actually decreased by about 16.7% (i.e. (£180 - £150) / £180 x 100%).

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Use tangents to solve the problem

Answers

The value of AD of the triangle using trigonometric ratios is: 18.7

How to use trigonometric ratios?

The sum of angles in a triangle is 180 degrees. Thus:

∠ABC = 180 - (41 + 35)

∠ABC = 104°

Using sine rule, we have:

AB/sin 35 = AC/sin 104

AB = (42 * sin 35)/(sin 104)

AB = 42 * 0.5911

AB = 24.826

Now, using trigonometric ratio:

AD/AB = cos 41

AD = 24.826 * 0.7547

AD = 18.7

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Write the equation of a line passing through the points (2,4) and (6,16).
1. y = 1/3 x + 14
2. y = 3x - 2
3. y = 3x + 2
4. y = 1/3 x + 13/3

Answers

The equation of a line passing through the points (2,4) and (6,16) is

2) y=3x-2.

What is equation?

When the slope of the line being studied is known, and the provided point is also the y intercept, the slope intercept formula, y = mx + b, is utilised (0, b).   It provides both a slope and an intercept, which is why the form is known as the slope-intercept form.

Here the given two points are [tex](x_1,y_1)=(2,4)[/tex] and [tex](x_2,y_2)=(6,16)[/tex] .

Now using slope formula then,

=> slope m= [tex]\frac{y_2-y_1}{x_2-x_1}[/tex] = [tex]\frac{16-4}{6-2} =\frac{12}{4} = 3[/tex]

Now using equation formula then [tex]y-y_1=m(x-x_1)[/tex]

=> y-4=3(x-2)

=> y-4 = 3x-6

=> y = 3x-6+4

=> y = 3x-2

Hence the equation is 2) y = 3x-2.

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Erin and her friends went to a movie on Thursday afternoon. It took 50 minutes to drive to the theater. They arrived at the theater 50 minutes before the movie started. Once it started, the movie lasted for 1 hour and 30 minutes and ended at 4:30 P.M. What time did Erin and her friends leave for the movies?

Answers

Answer: 12:30 P.M.

Step-by-step explanation:

50 + 50 + 50 + 90 minutes = 240 minutes
240 divided by 60 = 4
4 hours before 4:30 P.M. = 12:30 P.M.
Answer should be 12:30 P.M.

Answer:

They left the house at 1:20 P.M.

Step-by-step explanation:

The movie was an 1 1/2 so 4:30 - 1:30 = 3:00

Thy got there 50 minutes before so 3:00 - 0:50 = 2:10

It took them 50 minutes to get there so 2:10 - 0:50 = 1:20

Therefore they left the house at 1:20 P.M.

i tried doing this but i still get it wrong... it says to find the exact value of x. an explanation please?

Answers

Using some trigonometric relations we can see that x  = 6.72

How to find the value of x?

Here we know that the larger triangle is completely defined, then we can find the angle at X using a trigonometric relation:

Sin(a) = opposite cathetus/hypotenuse

Sin(a) = 7/25

Using the inverse sine function:

a = Asin(7/25) = 16.26°

Now, notice that angle at X is also an angle of the triangle whose x is a side, then we can use the relation:

sin(16.26°) = opposite cathetus/hypotenuse.

This time:

opposite cathetus = x

hypotenuse = 24

Replacing that:

sin(16.26°) = x/24

x = 24*sin(16.26°) = 6.72

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Amanda wants to fill this bottom shelf with the small tissue box cubes shown. How many tissue boxes can she fit in this shelf without any hanging out over the edge?
Amanda wants to fill this bottom shelf with the small tissue box cubes shown. How many tissue boxes can she fit in this shelf without any hanging out over the edge?
Responses


HELP MEEEEE

Answers

Answer:

yo moma

Step-by-step explanation:

an apartment complex rents an average of 2.3 new units per week. if the number of apartments rented each week has a poisson distribution, then the probability of renting exactly three apartments in a week is

Answers

The probability of renting exactly three apartments in a week using poisson distribution is 0.2107.

A Poisson distribution is a probability distribution that is used to evaluate how many times a particular event is likely to occur during a certain period of time.

The formula for calculating the probability of an event in a poisson distribution is as follows:

where e = 2.71828 (Euler's constant), x = the number of occurrences, μ = the expected value/average number of occurrences.In the given problem, the average number of new apartments rented per week is 2.3. Therefore,μ = 2.3Using the formula for Poisson distribution, we get:

P(3) = e^−2.3 * 2.3^3 / 3!

P(3) = 0.2107Therefore, the probability of renting exactly three apartments in a week is 0.2107.

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__________ LANs are usually arranged in a star topology with computers wired to central switching circuitry that is incorporated in modern routers.​
a) Mobile
b) Internet
c) ​Ethernet
d) Wireless

Answers

Ethernet LANs are usually arranged in a star topology with computers wired to central switching circuitry that is incorporated in modern routers.

Ethernet is a family of computer networking technologies that is used in LAN, metropolitan area networks (MAN), and wide area networks (WAN). It was first introduced in 1980 by Xerox Corporation, and later standardized by the Institute of Electrical and Electronics Engineers (IEEE) as IEEE 802.3.

Ethernet networks can be implemented in different topologies, such as a bus, star, or mesh topology. However, the most common topology for Ethernet LANs is a star topology, in which computers are wired to a central switching circuitry that is incorporated in modern routers. This allows for efficient communication between the computers on the network.In addition to LANs, Ethernet is also used for other networking applications such as Internet access, wireless networking, and broadband access. Overall, Ethernet is a widely used technology that has become an important component of modern computer networking.

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Eight shirts and six pairs of pants cost $726. Nine shirts and seven pairs of pants cost $831. Write a system of equations for the problem , using x as the cost of a shirt and y as the cost of a pair of pants.

Answers

Answer:

Step-by-step explanation:

8x + 6y = 726

9x + 7y = 831

56x + 42y = 5082

-54x - 42y = -4986

2x = 95

x = 47.50 Shirt

47.50(8) + 6y = 726

380 + 6y = 726

6y = 346

y = 57.67 pants

The diameter of a circle is 5 ft. Find its area in terms of pi

Answers

Answer:

[tex]6.25\pi \: {ft}^{2} [/tex]

Step-by-step explanation:

Given:

d = 5 ft

Find: a (area) - ?

First, we have to find the radius (r) of the circle, which is half diameter:

r = 0,5 × d

r = 0,5 × 5 = 2,5 ft

Now we can find the area of the circle (a):

[tex]a = \pi \times {r}^{2} = \pi \times ( {2.5})^{2} = 6.25\pi \: {ft}^{2} [/tex]

Answer:  The area of the circle is 19.625

Step-by-step explanation:

The formula for area of a circle is

[tex]A = \pi r^2[/tex]

We know that the diameter is 5 ft. The radius is half of the diameter, so we take 1/2 * 5 = 2.5

So the radius is 2.5

Now we will fill in the numbers for the formula

[tex]A = 3.14 * (2.5)^2[/tex]

or (3.14)(2.5)(2.5)

When we multiply all of the numbers, the area of the circle is 19.625

6. Prove: (1-cotA)² + (tanA-1)² = 4cosec²2A-4Cosec2A​

Answers

Answer:

Step-by-step explanation:

The city wants to build a bike path around a rectangular park. The bike path will surround the park and have the same width all the way around. The park is 300 feet by 200 feet (as shown in the picture).



Write an expression for the dimensions of the combined park and bike path in terms of x below:

Answers

The expression for the dimensions of the combined park and bike path in terms of x is length= 200+2x ft and  width = 300+ 2x ft.

What is expression?

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation. Unknown variables, integers, and arithmetic operators are the components of an algebraic expression. There are no symbols for equality or inequality in it.

Here the given rectangle park length is 200ft and width is 300 ft.

Now in the given diagram , path for bike is expended in both sides of the park.

Length of bike path = x + x = 2x

Width of bike path = x + x = 2x

Then combined dimensions for park and bike path is,

=> length = length of park+ length of path

=> length = 200+2x ft

=> width = width of park + width of bike path

=> width = 300+ 2x ft.

Hence the expression for the dimensions of the combined park and bike path in terms of x is length= 200+2x ft and  width = 300+ 2x ft.

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Which series of transformations shows that trapezoid E’F’G’H is similar to trapezoid EFGH? Assume all dilations are centered at the origin

Answers

The answer is option D: Reflect trapezoid EFGH across side HG, translate it three units up and four units to the right, and dilate it by a scale factor of 1/2.

Describe Scale Factor?

In mathematics, a scale factor is a ratio that describes how the size or dimensions of an object change when it is scaled up or down. It is the ratio of the size or measurement of an original object to the size or measurement of a new object that has been scaled by a certain factor.

For example, if the length of an object is multiplied by a scale factor of 2, the new object will be twice as long as the original object. Similarly, if the area of an object is multiplied by a scale factor of 3, the new object will have three times the area of the original object.

To show that trapezoid E’F’G’H is similar to trapezoid EFGH, we need to apply a sequence of transformations that preserves shape and size.

First, we notice that trapezoid EFGH can be transformed into trapezoid E’F’G’H by a dilation centered at the origin with a scale factor of 1/4, followed by a translation 3 units to the right and 4 units up. So, we need to find the transformation that maps EFGH onto E’F’G’H.

Option B reflects trapezoid EFGH across side EF, translates it 5 units up and 8 units to the right, and dilates it by a scale factor of 1/2. This transformation does not preserve shape and size, so it cannot be the correct option.

Option A reflects trapezoid EFGH across side HG, translates it 8 units up and 5 units to the right, and dilates it by a scale factor of 2. This transformation does not preserve shape and size either, so it cannot be the correct option.

Option C reflects trapezoid EFGH across side EF, translates it 4 units up and 3 units to the right, and dilates it by a scale factor of 2. This transformation does not preserve shape and size, so it cannot be the correct option.

Option D reflects trapezoid EFGH across side HG, translates it 3 units up and 4 units to the right, and dilates it by a scale factor of 1/2. This transformation preserves shape and size, so it is the correct option.

Therefore, the answer is option D: Reflect trapezoid EFGH across side HG, translate it three units up and four units to the right, and dilate it by a scale factor of 1/2.

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A bag contains 8 whit balls, 5 green balls, 7 blue
balls, and 10 black balls. If a single ball is
picked at random from the bag, what is the probability
that the ball is either a black or a white ball?

I need help I got 3/5 but the choice on my paper show 2/15 1/11 9/32 5/18

Answers

Answer: [tex]\frac{3}{5}[/tex]

Step-by-step explanation:

There is a total of 8 + 5 + 7 + 10 = 30 balls. There is 8 + 10 = 18 black or white balls. 18 / 30 simplifies to [tex]\frac{3}{5}[/tex].

14) A submarine travels and evasive course trying to outrun a destroyer. It travels 1 km north, then 1 km west then 1 km north, then 1 km west, etc... until it travels a total of 41 km. How many kilometers is the sub from the at which it started ?

Answers

the submarine is approximately 2.236 kilometers from its starting point.

Define distance travelled

Distance is a numerical measurement of the space between two points. It is the length of the path traveled by an object moving from one point to another, regardless of the direction it takes. Distance is typically measured in units such as meters, kilometers, feet, miles, or any other unit of length.

The submarine is essentially moving in a square pattern, with sides of length 1 km. Each time it moves north or west, it changes its distance from the starting point by 1 km.

Since the submarine moves 1 km north and 1 km west in each "leg" of its journey, it will complete 20 legs before traveling a total of 40 km. At this point, it will be 1 km north and 1 km west of its starting point.

The 21st and final leg of the journey brings the submarine 1 km north, so it ends up 2 km north and 1 km west of its starting point. Using the Pythagorean theorem, we can find the distance between the starting point and the final position of the submarine:

d = √((2 km)² + (1 km)²)

=√(5) km

≈ 2.236 km

Therefore, the submarine is approximately 2.236 kilometers from its starting point.

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Which of the following is equivalent to the expression below? (x+y+2) (y+1)

Answers

Answer:

D is correct.

Step-by-step explanation:

[tex](x + y + 2)(y + 1)[/tex]

[tex] xy + x + {y}^{2} + y + 2y + 2[/tex]

[tex] {y}^{2} + xy + x + 3y + 2[/tex]

So D is the correct answer.

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