2/3 of a class are girls. What is the ratio girls to boys in the class? What is the ratio boys to girls in the class?​

Answer:

Commutative Property.

Associative Property.

Distributive Property.

Identity Property.

We can see that the roots are:

α = 1 + 1.5i

β = 1 - 1.5i

Then the expression is:

1/(2α + β) + 1/(α + 2β) =  0.53

Here we first need to find the roots of the quadratic equation:

2x²-4x+5=0

Using the quadratic formula we will get:

[tex]x = \frac{4 \pm \sqrt{(-4)^2 - 4*2*5} }{2*2} \\\\x = \frac{4 \pm \sqrt{-24} }{4} \\\\x = 1 \pm 1.5i[/tex]

So the two solutions are:

α = 1 + 1.5i

β = 1 - 1.5i

Then the expression becomes:

1/(2α + β) + 1/(α + 2β)

1/(2 + 3i + 1 - 1.5i) + 1/(1 + 1.5i + 2 - 3i)

1/(3 + 1.5i) + 1/(3 - 1.5i)

To remove the complex part for the denominators we need to multiply and divide by the complements in each fraction, so we will get:

(3 - 1.5i)/(​3 + 1.5i)*(3 - 1.5i) + (3 + 1.5i)/(3 - 1.5i)*(3 + 1.5i)

[(3 - 1.5i) + (3 + 1.5i)]/(3² + 1.5²)

6/11.25 = 0.53

That is the solution.

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The equation of the straight line perpendicular to DE that passes through the mid-point of DE is y - 18 = 5/4(x - 1) which can be simplified to 5x - 4y + 42 = 0 where a=5, b=-4,c=42.

What is a midpoint?

In geometry, the midpoint is the middle point of a line segment. It is equidistant from the two endpoints and bisects the segment. It is also the centre of gravity of both the segment and the endpoints.

What is a straight line?

A straight line is a line of infinite length that has no curves. It can also be formed between two points, but both ends extend to infinity

According to the given information

The midpoint of DE is ((6-4)/2, (22+14)/2) = (1, 18).

The slope of DE is (14-22)/(-4-6) = -8/10 = -4/5.

The slope of the line perpendicular to DE is the negative reciprocal of -4/5 which is 5/4.

Therefore, the equation of the straight line perpendicular to DE that passes through the mid-point of DE is y - 18 = 5/4(x - 1) which can be simplified to 5x - 4y + 42 = 0.

Therefore a = 5, b=-4, c=42

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Answer:

≈24,57°

Step-by-step explanation:

Use trigonometry:

[tex] \tan(x°) = \frac{16}{35} [/tex]

[tex]x≈24.57°[/tex]

Use the reverse (SHIFT, tg (16/35)) to find x

I think this is the right answer

Answer:

x ≈ 24.57°

Step-by-step explanation:

using the tangent ratio in the right triangle

tan x = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{16}{35}[/tex] , then

x = [tex]tan^{-1}[/tex] ( [tex]\frac{16}{35}[/tex] ) ≈ 24.57° ( to 2 decimal places )

The probability of choosing a red marble and a green marble is 21/136 or approximately 0.154.

We must combine the probability of each occurrence occurring in order to determine the likelihood of selecting a red or an even-numbered green marble. Given that there are 14 red marbles in total among the total of 17 marbles, the chance of selecting a red marble is 14/17. Given that there is only one even-numbered green marble among the other 17 marbles, the probability of selecting one is 1/17. The likelihood of selecting a red or an even-numbered green marble is therefore: 14/17 + 1/17 = 15/17.

The likelihood of selecting a red or an even-numbered green marble is therefore 15/17, or roughly 0.882.

We must multiply the likelihood of selecting a red marble by the likelihood of selecting a green marble in order to determine the likelihood of selecting both red and green marbles. There are 16 marbles left after selecting one, including 2 green marbles. The odds of selecting a red stone during the initial draw are 14/17. After a red marble has been selected and is not being changed, the likelihood of selecting a green marble on the subsequent draw is 3/16. The odds of selecting a red marble and a green marble are as follows: (14/17) x (3/16) = 21/136 = 0.154

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which gives us a rate of "4 airplanes per 5 minutes" or "4/5 airplanes per minute."

To change minutes into hours, you can use simple mathematical operations.

There are 60 minutes in one hour. Therefore, to convert minutes into hours, you can divide the number of minutes by 60.

For example, if you have 120 minutes, you can divide 120 by 60 to get 2 hours (120 ÷ 60 = 2). Similarly, if you have 90 minutes, you can divide 90 by 60 to get 1.5 hours (90 ÷ 60 = 1.5).

Here's the formula you can use:

Hours = Minutes ÷ 60

So, to change any number of minutes into hours, divide that number by 60

by the question.

On a normal day, 12 airplanes arrive at an airport every 15 minutes. Write a rate that represents this situation.

The rate of airplanes arriving at the airport can be expressed as "12 airplanes per 15 minutes" or "12/15 airplanes per minute."

We can simplify this fraction by dividing the numerator and denominator by 3,

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Answer:

m = 4 + 0.18b

Step-by-step explanation:

So, we are looking to find the total amount of money that Ariella earns.

$4.00 is what she initially gets paid.

plus 18%, 18 / 100 = 0.18

then b is the amount of total bill

so, we multiply the amount of percentage which is 18% to the amount of total bill which is b to get what she additionally earns after the customers paid the bill.

so initial pay is $4 + 18% which is 0.18 multiply to b, b represents the total bill.

$4 + 0.18b = m

Monte Carlo simulation can done by generating a large number of random points within the quarter circle and the square, we can obtain an accurate estimate of pi using the formula pi/4 = area Q/area S.

Monte Carlo simulation is a statistical method that involves generating random numbers to simulate real-life scenarios. In this case, we will use the method to approximate the value of pi by generating random points inside the quarter circle Q and the square S.

The algorithm for this simulation is as follows:

1. Set the number of random points (n) to be generated.

2. Initialize two counters: count_Q and count_S to zero.

3. Generate n random points within the square S. Each point is represented by a pair of random numbers (x,y) such that 0 <= x <= 1 and 0 <= y <= 1.

4. For each point generated, determine if it falls within the quarter circle Q by checking if x^2 + y^2 <= 1. If it does, increment the count_Q by 1.

5. Increment the count_S by 1 for every point generated.

6. Calculate the ratio of count_Q to count_S, which represents the ratio of the area of Q to the area of S.

7. Multiply the ratio obtained in step 6 by 4 to get an approximation of pi.

The logic behind this algorithm is that the ratio of the areas of the quarter circle Q to the square S is pi/4. Thus, by generating random points within the square S and determining the number of points that fall inside the quarter circle Q, we can estimate the value of pi.

To implement this algorithm in Excel, we can use the RAND() function to generate random numbers for the x and y coordinates of each point. We can then use an IF statement to determine if each point falls within the quarter circle. We can use a loop to generate a large number of random points, such as 10,000 or 100,000, to obtain a more accurate estimate of pi.

In summary, Monte Carlo simulation is a powerful tool for approximating the value of pi using random numbers and the properties of geometric shapes. By generating a large number of random points within the quarter circle and the square, we can obtain an accurate estimate of pi using the formula pi/4 = area Q/area S.

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Therefore, the new coordinates after dilation are:

Z' = (0, 1) and (8, 5).

A coordinate is a set of numbers or values that represent the position or location of a point or object in space. Coordinates are often used in mathematics, geometry, and science to describe the location of objects in a two-dimensional or three-dimensional space.

In a two-dimensional coordinate system, such as the Cartesian coordinate system, a point is represented by two values, usually denoted as (x, y), where x represents the horizontal distance from a fixed point called the origin, and y represents the vertical distance from the origin.

In a three-dimensional coordinate system, a point is represented by three values, usually denoted as (x, y, z), where x, y, and z represent the horizontal, vertical, and depth distances from the origin.

by the question.

To dilate an image by a scale factor of 2 with the center of dilation at the blue dot, we need to double the distance between each point and the blue dot.

First, we calculate the distance between each point and the center of dilation:

[tex]|X' - blue dot| = |-1 - (-2), -3 - (-2)| = (1, 1)|y' - blue dot| = |3 - (-2), 1 - (-2)| = (5, 3)[/tex]

To double the distance, we simply multiply each distance by 2:

[tex]|X' - blue dot| * 2 = (2, 2)|y' - blue dot| * 2 = (10, 6)[/tex]

Finally, we add the doubled distances to the blue dot to get the new coordinates:

[tex]Z' = blue dot + |X' - blue dot| * 2 = (-2, -1) + (2, 2) = (0, 1)Z' = blue dot + |y' - blue dot| * 2 = (-2, -1) + (10, 6) = (8, 5)[/tex]

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The probability that an adult resident has 3 or more vehicles 0.54.

The probability of an adult resident having 3 or more vehicles is the sum of the probabilities associated with owning 3, 4, or 5 or more vehicles:

P(3 or more vehicles) = P(3) + P(4) + P(5 or more)

P(3 or more vehicles) = 0.38 + 0.13 + 0.03

P(3 or more vehicles) = 0.54

Therefore, the probability that an adult resident has 3 or more vehicles is 0.54.

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now, we're making an assumption that's a rectangular prism pool, so the volume is simple the product of length and widh and height, which we have, let's convert them all to improper fractions.

[tex]\stackrel{mixed}{14\frac{1}{2}}\implies \cfrac{14\cdot 2+1}{2}\implies \stackrel{improper}{\cfrac{29}{2}}~\hfill \stackrel{mixed}{6\frac{1}{2}} \implies \cfrac{6\cdot 2+1}{2} \implies \stackrel{improper}{\cfrac{13}{2}} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{length}{\cfrac{29}{2}}\cdot \stackrel{width}{\cfrac{13}{2}}\cdot \stackrel{depth}{\cfrac{13}{2}}\implies \cfrac{4901}{8} \\\\\\ \cfrac{4896+5}{8}\implies \cfrac{4896}{8}+\cfrac{5}{8}\implies 612+\cfrac{5}{8}\implies 612\frac{5}{8}[/tex]

Answer: i believe its 10 if there no multiplication

Step-by-step explanation:

:o

The values of k that would make the product of ᵏ⁄3 × 12 be greater than 12 is: D. for any value of k greater than 3.

The product of two numbers is the result obtained when one number is multiplied by another.

A. For values of k that are less than 1 but greater than 0, i.e 1.5, we have:

0.5/3 * 12 > 12

2 > 12 [false]

B. For values of k that are less than 3 but greater than 1, i.e 2, we have:

2/3 * 12 > 12

8 > 12 [false]

C. For any value of k that is equal to 3, i.e. 3, we have:

3/3 * 12 > 12

12 > 12 [false]

D. For values of k that are greater than 3, i.e 6, we have:

6/3 * 12 > 12

24 > 12 [true]

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The probability of selecting at random, without replacement, two blue marbles is 5/12 i.e. A.

What exactly is probability?

Probability is a measure of the possibility or chance of an event to be occurred. It is a mathematical concept that is used to describe the degree of uncertainty or randomness associated with an event.

The probability of an event is represented by a number between 0 and 1, with 0 indicating that the event is impossible and 1 indicating that the event is certain. For example, the probability of rolling a 6 on a fair six-sided die is 1/6, because there is only one way to roll a 6 out of the six possible outcomes.

Now,

Using formula for probability:

P(A and B) = P(A) × P(B|A)

where P(A and B) is the probability of events A and B occurring together, P(A) is the probability of event A occurring, and P(B|A) is the probability of event B occurring given that event A has occurred.

In this case, we want to find the probability of selecting two blue marbles without replacement. Let's break this down into two events:

Event A: Selecting a blue marble on the first draw

Event B: Selecting a second blue marble on the second draw (without replacement)

For Event A, the probability of selecting a blue marble on the first draw is 6/9, since there are 6 blue marbles out of a total of 9 marbles.

For Event B, the probability of selecting a blue marble on the second draw given that a blue marble was selected on the first draw is 5/8, since there are 5 blue marbles remaining out of a total of 8 marbles.

So, using the formula for probability, we have:

P(Event A and Event B) = P(Event A) × P(Event B|Event A)

= (6/9) × (5/8)

= 30/72

= 5/12

Therefore, the probability of selecting at random, without replacement, two blue marbles is 5/12.

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Answer:

this better be a joke because what kind of teacher actually uses this

Step-by-step explanation:

Answer:

100 times

Step-by-step explanation:

60/0.6 = 100

On average, someone who buys a ticket can expect to make a profit of $2.43 as the expected value for someone who buys a ticket is $2.43.

It is the average amount of money that an individual can expect to win or lose on an investment. It is calculated by multiplying the probability of each outcome by its payoff and then adding the expected values of all outcomes.

In this case, the probability of winning= 1/737

and the payoff = $1800 - $8

= $1792.

The expected value (EV) is calculated by multiplying the probability of each outcome by its payoff.

EV = (1/737) x (1792)

EV = $2.43

Therefore, the expected value for someone who buys a ticket is $2.43. This means that, on average, someone who buys a ticket can expect to make a profit of $2.43.

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In physics, work is energy transferred to or from an object by applying a force along a displacement and the work done in the given situation is 120J.

In physics, work is energy transferred to or from an object by applying a force along a displacement.

In its simplest form, work done with a constant force in the direction of motion is equal to the product of the force and the distance traveled.

Expressing this concept mathematically, the work W is equal to the force f multiplied by the distance d, or W = fd.

If the force is applied at an angle θ to the displacement, the work done is W = fd cos θ.

So, the work done is calculated as follows:

W = 40lb*3ft

W = 120 J

Therefore, the work done in the given situation is 120 J.

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Answer:2.75 gallons of water

Step-by-step explanation:

Answer:

One gallon is equal to 16 cups of water.

To find out how many gallons are in 44 cups of water, we can divide 44 by 16:

44 cups ÷ 16 cups/gallon = 2.75 gallons

Therefore, 44 cups of water is equal to 2 and 3/4 gallons.

Step-by-step explanation:

1. Recall that 1 gallon is equal to 16 cups of water. Therefore, to find how many gallons are in 44 cups of water, we can set up a proportion:

1 gallon / 16 cups = x gallons / 44 cups

2. To solve for x, we can cross-multiply and simplify:

16x = 1 * 44

16x = 44

x = 44 / 16

x = 2.75

3. The result of 2.75 gallons represents the equivalent amount of water in gallons. To express this answer as a whole number or mixed number, we can observe that 2.75 is equal to 2 and 3/4:

2.75 = 2 + 0.75

2.75 = 2 + 3/4

Therefore, 44 cups of water is equal to 2 and 3/4 gallons.

Answer:

650

Step-by-step explanation:

It's simple

Answer : 0.99

Explanation :  15 * 6.6/100 For The Tax.

Total : 15.99

Answer:

Step-by-step explanation: b) 10

The volume of the dining room can be expressed in standard form as x³+ 18x² + 108x + 216, which is obtained by expanding the given expression (x+6)³ using the binomial expansion formula.

HOW TO EXPRESS THE VOLUME?

To express the volume of the dining room in standard form, we need to expand the given expression using the binomial expansion formula. The binomial expansion formula is given by:

(a + b)ⁿ = ⁿC₀ aⁿ + ⁿC₁ aⁿ⁻¹ b + ⁿC₂ aⁿ⁻²b²+ ... + ⁿCₙ₋ ₁a bⁿ⁻¹ + ₙCⁿ bⁿ

where nCk represents the binomial coefficient of selecting k items from a set of n items.

Using this formula, we can expand (x+6)^3 as:

(x+6)³ = ³C₀x³+  ³C₁x²+(6) +  ³C₂+ x (6)²+  ³C₃+ (6)³

= 1x³ + 18x² + 108x + 216

Therefore, the volume of the dining room can be expressed in standard form as:

x³+ 18x²+ 108x + 216

In standard form, the expression is arranged in descending powers of the variable, and the coefficients are written with the highest degree coefficient first. In this case, the expression is already in standard form, and we do not need to make any further changes.

To summarize, the volume of the dining room can be expressed in standard form as x³+ 18x² + 108x + 216, which is obtained by expanding the given expression (x+6)³ using the binomial expansion formula.

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The x-values of the points of intersection are x = 0, x = 3, and x = -2.

A point of intersection is a point where two or more lines, curves, or surfaces intersect or cross each other. In other words, it is the point where two or more objects coincide. For example, in a two-dimensional plane, the point of intersection of two lines is the point where the two lines cross each other.

In the given question,

To find the x-values of the points of intersection, we need to solve the equation 2x³ - x² - 7x = x² + 5x.

Simplifying this equation, we get:

2x³ - 2x² - 12x = 0

2x(x² - x - 6) = 0

2x(x - 3)(x + 2) = 0

So, the x-values of the points of intersection are x = 0, x = 3, and x = -2.

a. A = -2, B = 0, C = 3

b. To set up integrals to find the area of the regions, we need to determine which function is on top in each region. The boundary points give us the values of x for which the functions intersect and change positions.

The region between A and B is bounded by y = x² + 5x on top and y = 2x³ - x² - 7x on the bottom, so the integral for this region is:

∫ from A to B of [x² + 5x - (2x³ - x² - 7x)] dx

The region between B and C is bounded by y = 2x³ - x² - 7x on top and y = x² + 5x on the bottom, so the integral for this region is:

∫ from B to C of [(2x³ - x² - 7x) - (x² + 5x)] dx

Note that the limits of integration are the x-values of the points of intersection.

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Answer:

1 hot dog = $1.45

1 juice drink = $1.05

Step-by-step explanation:

let x rep hot dog

y rep juice drink

Baxter= 6x+4y=12.9

Farley=3x+4y=8.55

6x+4y=12.9

-3x+4y=8.55

3x+0=4.35

x=4.35/3=1.45

y=1.05

The value of x in the series given the first three terms x + 5, x + 1 and x is 1/3

Given that, we have

x + 5, x + 1 and x

Using the common ratio, we have

(x + 5)/(x + 1) = (x + 1)/x

So, we have

x² + 5x = x² + 2x + 1

Evaluating the like terms, we have

3x = 1

Divide by 3

x = 1/3

Hence, the value of x is 1/3

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The answer would probaly be 1

Area of sector is 177.8cm².

In geometry, a sector is a region of a circle that is bounded by two radii and an arc, where the radii intersect at the center of the circle. The area of a sector is the fraction of the circle's total area that is enclosed by the sector.

where A is the area of the sector, θ is the central angle of the sector (measured in degrees), r is the radius of the circle, and π (pi) is a mathematical constant approximately equal to 3.14159.

The formula for the area of a sector is:

A = (θ/360) x πr²

Angle made by sector=360-256=104

Radius of circle=14cm

Area of the sector DFE=∅/360×πr²

=104/360×π×14²

=177.8cm²

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