Dylan was out at a restaurant for dinner when the bill came. His dinner came to 32. He wanted to leave a 15% tip. How much was his meal plus the tip,before tax,in dollars and cents

80 units  is the minimum unit cost.

What is cost and example?

Cost is the price paid, which is typically calculated based on the resources given up to accomplish a specific goal. It entails making a sacrifice in exchange for goods or services. Not all costs translate into expenses. Assets and expenses both have costs associated with them. Expiring costs are called expenses.

it means

the function C(x) = 0.9x² - 144x + 21,053

So, the derived of C(x) respect to "x" is

     C(x)' = 0.9 * 2x - 144

   Now, we make the previous expression equal to zero and clear "x":

       1.8x - 144 = 0

          1.8x = 144

            x = 144/1.8

            x = 80

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Answer:

x=9

Step-by-step explanation:

The angles that measure 13x and 7x make a line. A line is 180°. 13+7 is 20 and 20 x 9 is 180.

Therefore x is 9

The value of the functions are;

x = 1, f(x) = 1/2

x = 2, f(x) = -1

x = 3 , f(x) = -5/2

x = 3, f(x) = -4

Note that functions are expressions or equations that shows the relationship between variables.

The variables are;

From the information given, we have the function as;

f(x) = -3/2x + 2

Now, substitute the value of x as 1

f(1) = -3/2(1) + 2

f(1) = -3/2 + 2 = -3 + 4 /2 = 1/2

f(2) = -3/2(2) + 2

expand the bracket

f(2) = -6/2 + 2 =-6 + 4  /2 = -2/2 = -1

For the value of x = 3

f(3) = -3/2(3) + 2

expand the bracket'

f(3) = -9/2 + 2

f(3) = -5/2

For the value of x = 4

f(4) = -3/2(4) + 2

f(4) = -8/2

f(4) = -4

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A possible comment from Prudence math instructor would be Great job solving the rational equation! It's not an easy task, and you managed to find the solutions x = 1 and x = -4, which is correct.

Here are some other possible comments that Prudence's math instructor might make about her solution:

Make sure to check your solutions by plugging them back into the original equation. It's always a good practice to do so, as it helps you avoid mistakes and verify that your solutions are indeed valid.

When dealing with rational equations, you need to be careful about the restrictions on the domain. In this case, the denominator cannot be equal to zero, so x = -4 and x = 2 are not valid solutions. Make sure to mention this in your solution.

When simplifying the expression, make sure to distribute the negative sign (-) properly. In this case, you should have -7x - 20 instead of -7x + 20. Double-check your calculations to avoid such errors.

Make sure to show all the steps in your solution, including how you obtained the common denominator and how you simplified the expression. This helps the reader follow your thought process and understand your solution better.

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The solution of the expression is 2√5x(√2-1).

Multiplication is an arithmetic operation in mathematics that combines two or more numbers to obtain a product. It is denoted by the "×" or "·" symbol, or by placing numbers adjacent to each other with no symbol between them. For example, 2 × 3 = 6, and 4 · 5 = 20.

Multiplication is commutative, meaning that changing the order of the factors does not change the product. For example, 3 × 5 = 5 × 3 = 15. Multiplication is also associative, meaning that changing the grouping of the factors does not change the product. For example, (2 × 3) × 4 = 2 × (3 × 4) = 24.

From the question, we have

√5x ( √8x² - 2√x)

= √5x ( 2√2x - 2√x)

= √5x(√2-1)(2√x)

= 2√5x(√2-1).

The solution of the expression is 2√5x(√2-1).

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The complete question is:

Find the simplified product where x20: √5x (√8x²-2√x)

√10x

2x √40x-2x

O 2x10x-2√5x

O2x10x-2x√√5

DONE

Answer:1

Step-by-step explanation:

then, x should be smaller than 3

in this canse it is 1;

Therefore, 6:15 is less than 30:80.

Ratio is a mathematical term that describes the relationship between two or more quantities in terms of how many times one quantity contains another. It is usually expressed in the form of a fraction or a colon. For example, if there are 10 boys and 20 girls in a class, the ratio of boys to girls is 1:2, or 1/2. Ratios can be used to compare and analyze data in various fields, including finance, economics, and statistics.

To compare 3:5 and 30:80, we need to make sure they have the same denominator. We can find the equivalent ratio of 30:80 by dividing both terms by 10, which gives 3:8.

Now we can compare 3:5 and 3:8. The first term is the same in both ratios, so we can compare the second terms.

Since 5 is less than 8, we can say that:

6:15 ____ 30:80

Therefore, 6:15 is less than 30:80.

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The complete question is: The question is not clear. However, based on the given information, the task is to compare the two ratios "6:15" and "30:80" by entering either "K" (which means the first ratio is greater), "=" (which means the two ratios are equal), or "<" (which means the second ratio is greater) in the box.

Answer:

B. The x values of -6, 0, 2, 4 and 7.

Step-by-step explanation:

The domain of a function is its x-values. Therefore, the points on the graph contain the x-values -6, 0, 2, 4, and 7, so that is the domain.

The difference  between the most expensive and the cheapest material is £1.78​

The term "difference" can also be used more generally to refer to the amount by which two quantities differ.

The concept of difference is closely related to the concept of distance, which refers to the numerical value of the separation between two points, or to prices as in the case we have here.

The difference  between the most expensive and the cheapest material is; £9.77 -  £7.99 =  £1.78​

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The derivative of the expression is: f'(x) = 9132(31x^30) + 6.

The derivative of this function can be obtained by applying the constant multiple rule in which the constant is multiplied by the derivative of the function. Next, we will apply the power rule of differentiation in which the power rule of differentiation. When these are applied, we will have the following:

First, the principle of linear differentiation is applied to all the values on the right as follows:

f'(x) = d/dx [9132x^31 + x + x + x + x + x + x]

     = d/dx [9132x^31] + d/dx [x] + d/dx [x] + d/dx [x] + d/dx [x] + d/dx [x]  

When we apply the constant multiple rule, this then equals:

     9132 d/dx [x^31] + d/dx [x] + d/dx [x] + d/dx [x] + d/dx [x] + d/dx [x]

Finally, we apply the power rule of differentiation to obtain:

     = 9132 (31x^30) + 1 + 1 + 1 + 1 + 1

     = 9132 (31x^30) + 6

So, the derivative of the function is f'(x) = 9132(31x^30) + 6.

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Math instructor may provide feedback on Prudence's solution by advising her to check her solutions for extraneous solutions, showing more detailed work, and continuing to practice solving challenging problems to improve her skills for equation.

One possible comment the math instructor could make about Prudence's solution is that it is important to check the solutions she obtained to make sure they are valid. When solving rational equations, it is possible to obtain extraneous solutions, which are solutions that do not work in the original equation. Therefore, the instructor may advise Prudence to substitute her solutions back into the original equation and verify that they satisfy the equation.

Another comment the instructor could make is that Prudence should show her work and steps in more detail, especially if she is turning in her solution for a graded assignment. By showing more detailed work, Prudence can demonstrate a deeper understanding of the problem and how she arrived at her solution.

The instructor may also commend Prudence on her ability to solve a complex rational equation with multiple variables and parentheses. This shows that she has a strong grasp of algebraic concepts and can apply them effectively. However, the instructor may also suggest that Prudence continue to practice solving more challenging problems to further improve her skills.

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Hence, the normal octagon has a space of about 310.8 square feet. with a radius of 10.5 feet and a circumference of 64 feet. The area of the normal octagon is roughly 310.8 square feet, while the length of the apothem is roughly 9.7 feet.

Each side of the octagon is 64/8 = 8 feet long because the circumference of an octagon is equal to the sum of its side lengths.

From the octagon's centre to one of its sides' midpoints, draw a line. The radius of a triangle produced by the octagon's centre and two consecutive vertices is this line segment, which is also known as the apothem. This triangle is isosceles and has an apothem of 10.5, with a base length of 8. The Pythagorean theorem can be used to determine the triangle's height.

[tex]height^2= \frac{apothem^2 - base^2}{4}[/tex]

[tex]height^2= \frac{10.5^2 - 8^2}{4}\\height^2= \frac{110.25 - 64}{4} \\height^2 = \frac{46.25}{4}[/tex]

height ≈ 9.7

Hence, the apothem is around 9.7 feet long.

A = (1/2)ap, where an is the apothem and p is the perimeter, gives the area of an octagon. By substituting our current values, we get:

A = (1/2) x 9.7 x 64

A ≈ 9.7 x 32

A ≈ 310.8 [tex]ft^2[/tex]

Hence, the normal octagon has a space of about 310.8 square feet.

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Answer:

A rectangular octagon is shown in the ceiling of a cathedral. The radius is 10.5 feet and the perimeter is 64 feet.

The regular octagon in the ceiling of this cathedral has a radius of 10.5 feet and a perimeter of 64 feet.

What is the length of the apothem of the octagon? Round your answer to the nearest tenth of a foot.

Using your answer for the length of the apothem, what is the area of the regular octagon? Round your answer to the nearest tenth of a square foot.

Step-by-step explanation:

A. (1, 5), B. (4, 6), and C. (2, 4) is ordered pair is a solution to the system of inequalities where y > 2x y >  3

What is inequalities?

In mathematics, an inequality is a mathematical statement that indicates that two expressions are not equal. It is a statement that compares two values, usually using one of the following symbols: "<" (less than), ">" (greater than), "≤" (less than or equal to), or "≥" (greater than or equal to).

To check which ordered pair is a solution to the system of inequalities y > 2x and y > 3, we need to check if each pair satisfies both inequalities.

A. (1, 5)

Plugging in x=1 and y=5 into the inequalities, we get:

5 > 2(1) and 5 > 3

Both inequalities are true, so (1, 5) is a solution.

B. (4, 6)

Plugging in x=4 and y=6 into the inequalities, we get:

6 > 2(4) and 6 > 3

Both inequalities are true, so (4, 6) is a solution.

C. (2, 4)

Plugging in x=2 and y=4 into the inequalities, we get:

4 > 2(2) and 4 > 3

Both inequalities are true, so (2, 4) is a solution.

D. (0, 3)

Plugging in x=0 and y=3 into the inequalities, we get:

3 > 2(0) and 3 > 3

The first inequality is true, but the second inequality is false. Therefore, (0, 3) is not a solution.

Therefore, the solutions are A. (1, 5), B. (4, 6), and C. (2, 4).

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Answer:

(7.51,-1.3)

Step-by-step explanation:

rewrite 5-0.7x=0.2y in terms of x,

divide both sides by 0.2 to get: 25-3.5x = y

substitute the y part in -y+0.4x=4.3 with the new equation that we made

(in bold)

so,

-(25-3.5x) +0.4x = 4.3

expand and simplify

so,

-25 +3.5x +0.4x = 4.3 -> -25 +3.9x = 4.3 -> 3.9x = 29.3 -> x ≈ 7.51

now, substitute  the new x (underlined) to the equation in bold

so,

25-3.5(7.51) = y -> y ≈ -1.3

graphing both equations on desmos can verify the answers (only if you rearrange the two equations to get y by itself)

The set of side lengths that can produce a triangle as required in the task content is; Choice E; 5, 7, 11.

It follows from the task content that the set of side lengths that could produce a triangle.

Recall from the triangle inequality theorem that the sum of any two side lengths is greater than the third side length. Also, the difference of any two side lengths is less than the third side length.

Hence, the correct answer choice is; Choice E; 5, 7, 11.

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Answer: $29.25

(I'm not American)

Step-by-step explanation:

65% of 45 = 65/100 x 45 =  29.25

We can conclude by answering the provided question that However, standard there is still some height variance within the cohort. Some pupils may be taller or shorter than the average height by more than 1.4 inches

A statistic that shows the variability or variation of a collection of data is the standard deviation. A high standard deviation indicates that the values are more scattered, whereas a low standard deviation indicates that the values are closer to the set mean. The standard deviation is a measure of how far the statistics are from the norm (or ). When the standard deviation is small, the data tends to cluster around the mean; when it is high, the data is more scattered. The standard deviation represents the typical variability of the data collection. It displays the average departure from the mean of each number.

The standard deviation is a measure of the amount of variation or dispersion in a set of data. It tells us how much the values in a dataset differ from the mean value.

We know that the mean height is 61 inches and the standard deviation is 1.4 inches. To calculate the range of heights within one standard deviation from the mean, we can use the following formula:

range = mean ± (standard deviation)

Substituting the values we have:

range = 61 ± (1.4)

range = (59.6, 62.4)

This means that about 68% of the students in the class have heights between 59.6 inches and 62.4 inches.

The fact that the standard deviation is 1.4 inches tells us that there is some variation in the heights of the students. This means that not all students have the same height. Some students may be taller than the mean height of 61 inches, while others may be shorter.

The range of heights within one standard deviation from the mean (59.6 to 62.4 inches) is relatively narrow, which suggests that most of the students in the class have heights that are relatively close to the mean.

Overall, the variation in height can be seen as a natural part of human diversity, and it is something to be celebrated rather than feared. The standard deviation simply helps us to quantify the amount of variation in the height data.

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Samuel has a total of 45 toy cars in his collection. Let's assume that Samuel has x toy cars in total. We know that 60% of his collection consists of red toy cars, which means that he has 0.6x red toy cars.

According to the problem, he has 27 red toy cars, so we can set up the following equation:

0.6x = 27

To solve for x, we can divide both sides by 0.6:

x = 27 / 0.6

x = 45

Therefore, Samuel has a total of 45 toy cars in his collection.

It's important to note that this solution assumes that the only colors of toy cars in Samuel's collection are red and non-red. If there are other colors present, then the total number of cars in his collection may be different. Additionally, we assumed that the problem is referring to whole numbers of toy cars, so if the collection includes fractional parts of cars, the answer may be different as well.

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Answer:

Seven Ones and two hundredths

One hundred thirty

Step-by-step explanation:

5.4 X 1.3= Seven Ones and two hundredths

13 X 10= One hundred thirty

The length of the third side is increasing at a rate of 8√3 m/min when the angle between the sides of the fixed length is 60° and increasing at a rate of 2°/min.

An angle is a geometric figure formed by two rays (also known as sides) that share a common endpoint (also known as the vertex). The rays are typically represented as straight lines, and the angle is measured in degrees or radians.

Let's call the two sides of fixed length (9 m and 16 m) sides a and b, respectively, and let's call the variable third side c. Let's also call the angle between sides a and b θ. We want to find how fast the length of side c is changing (dc/dt) when θ is 60° and dθ/dt is 2°/min.

To solve this problem, we can use the law of cosines, which relates the lengths of the sides and the cosine of the angle between them:

c² = a² + b² - 2ab cos θ

We can take the derivative of both sides of this equation with respect to time (t) to get:

2c(dc/dt) = 2a(da/dt) + 2b(db/dt) - 2ab(-sin θ)(dθ/dt)

At the moment when θ = 60°, we know that a = 9 m and b = 16 m. We also know that dθ/dt = 2°/min. To find da/dt and db/dt, we can use the fact that the triangle is isosceles when θ = 60°, so a = b = c/2. Taking the derivative of this equation with respect to time, we get:

da/dt = db/dt = (1/2)(dc/dt)

Substituting these values into the equation we derived earlier, we get:

2c(dc/dt) = 2(9/2)(1/2)(dc/dt) + 2(16/2)(1/2)(dc/dt) - 2(9)(16)(-sin 60°)(2°/min)

Simplifying and solving for dc/dt, we get:

dc/dt = 8√3 m/min

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Answer: A

Step-by-step explanation:

9 + 9 + 5 =23

CONSECUTIVE NUMBERS: 4,5,6,8

The largest number less than 1000 that is equal to sum of 4 natural consecutive numbers is 998.

The natural numbers include the positive integers (also known as non-negative integers) and a few examples include 1, 2, 3, 4, 5, 6, …∞. In other words, natural numbers are a set of all the whole numbers excluding 0. 23, 56, 78, 999, 100202, etc. are all examples of natural numbers.

We have to find the largest natural number less than 1000 that is equal to the sum of 4 natural consecutive.

First number is 999.

So, the sum is =  9 + 9 + 9 = 27

Now, the next number is

= 9 + 9 + 8

= 26

Also, 26 can be represented as sum of 4 Natural number as

= 5 + 6 + 7 + 8 = 26

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Answer:

51.06

Step-by-step explanation:

SOH CAH TOA

Sine = opposite/hypoteneuse

Cosine = adjacent/hypoteneuse

Tangent = opposite/adjacent

When looking for angles use the inverse function.

According to image you have the opposite of the angle and the hypotenuse

hypotenuse = 9

opposite = 7

using SOH we can find the angle: sin^-1(7/9) = 51.06

The value of angle B is 68 degrees and the length of the segments b is 27.81 and c is 11.28.

A triangle's sides and angles are related by the Law of Sines, a trigonometric formula. It specifically specifies that for all three sides and angles of the triangle, the ratio of the length of one side to the sine of the angle opposite that side is the same. This may be expressed as the following equation:

sin A/a = sin B/b = sin C/c

where a, b, and c are the lengths of the sides that are on each side of the triangle's three angles, A, B, and C.

For the give triangle we can use the Law of sines to find the missing values.

The law of sine is given as:

sin A/a = sin B/b = sin C/c

Given A = 90 degrees and C = 22 degrees,

sin 90 / 30 = sin 22 / c

c = 30 sin 22 / sin 90

c = 30 (0.37) / 1

c = 11.28

Now, Using the sum of triangles:

90 + 22 + B = 180

112 + b = 180

B = 68

Now,

sin A/a = sin B/b

Sin 90 / 30 = sin (68) / b

b = 30 sin (68)  sin 90

b = 27.81

Hence, the value of angle B is 68 degrees and the length of the segments b is 27.81 and c is 11.28.

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The sum of the probabilities of choosing each weekday is:

0.12 + 0.07 + 0.05 + 0.28 + 0.15 + p(Friday) + p(Weekend) = 1

where p(Friday) is the probability of choosing Friday and p(Weekend) is the probability of choosing one of the weekend days (Saturday or Sunday).

We know that the probability of choosing one of the weekdays is:

p(Weekdays) = 0.12 + 0.07 + 0.05 + 0.28 = 0.52

So, the probability of not choosing one of the weekdays is:

p(Not Weekdays) = 1 - p(Weekdays) = 1 - 0.52 = 0.48

Therefore, the probability that it will not choose one of the weekdays is 0.48.

Answer:

7x + 9

Step-by-step explanation:

f(x) = x + 1

g(x) = 7x + 8

therefore, (fog)(x) = f(g(x))

f(g(x)) = (7x + 8) + 1

= 7x + 9

1. The length of the arc is 2π

2. The value of x is 22.95°

3. The measure of side m is (4√3)x

Trigonometric Ratios are defined as the values of all the trigonometric functions based on the value of the ratio of sides in a right-angled triangle.

sin(tetha) = opp/hyp

cos(tetha) = adj/hyp

tan(tetha) = opp/adj

1. The length of an arc = tetha/360 × 2πr

= π/3 × 1/360 × 2 × π × 6

= 2π

the length of the arc is 2π

2. Sin60 = y/23

√3/2 = y/23

23√3 = 2y

y = 11.5√3

sin x = 11.5√3/51

sinx = 0.39

x = sin^-1(0.39)

x= 22.95°

3. the measure of mis calculated from

cos 30 = 6x/m

√3/2 = 6x/m

12x = √3m

m = 12x/√3

= 12x√3/3

= 4x√3.

= (4√3)x.

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Answer:

B

Step-by-step explanation:

8.05 by -16.8 = -135.24

all you had to do is multiply 8.05 by -16.8

The product is -135.24

The group contains all possible isometries of the polygon onto itself and can be used to describe and analyze the symmetries and properties of the polygon.

What is rotational symmetry in a hexagon?

Rotational symmetry in a hexagon is a type of symmetry where the hexagon can be rotated by a certain angle about its center, and the resulting figure coincides with the original hexagon. The angle of rotation that produces this symmetry is called the angle of rotational symmetry, and it depends on the number of sides or vertices of the hexagon.

In the context of the dihedral group D of a regular polygon with n vertices, this statement means that the isometries (rigid transformations that preserve distances and angles) of the polygon onto itself are composed of n symmetries about the n axes of symmetry that intersect at the center of the polygon, and n rotations about the center by multiples of 2π/n radians.

The n symmetries are denoted by s0, s1, ..., sn-1, where si is the symmetry about axis i (with axis 0 being the axis passing through the center and vertex 0). These symmetries reflect the polygon across each axis of symmetry, producing a total of n reflections.

The n rotations are denoted by r0, r1, ..., rn-1, where ri is the rotation by 2πi/n radians about the center of the polygon. These rotations rotate the polygon counterclockwise around its center by a fraction of a full turn, with the fraction being i/n. This produces a total of n rotations, with r0 being the identity rotation (i.e., not rotating at all).

Together, the n symmetries and n rotations form the dihedral group D of the regular polygon with n vertices. This group contains all possible isometries of the polygon onto itself and can be used to describe and analyze the symmetries and properties of the polygon.

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The area of one segment formed by a 6" square inscribed in a circle cxan be expressed as 5.13 square inches.

Two unique points on a line define the boundaries of a line segment. A line segment is sometimes referred to as a section of a line that links two places. The difference between a line and a line segment is that a line has no endpoints and can go on forever in either direction.

We can form a triangle from this and from trigonometry, let the hypotenus = diameter

C= √6^2 + 6^2 = 6√ 2

diameter = 6√ 2,

radius = 3√ 2

A rea of the segment can be calculated as

r^2/2 [π θ/180 -sin θ)

( 3√ 2)^2 [90π/180 - sinθ)

=9( π/2 - 1)

=5.13 square inches

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Answer:

Step-by-step explanation:

You want the solution in polar form of the system of equations ...

The usual solution methods for a system of equations apply. The attached calculator shows the currents to be ...

__

Additional comment

For systems of equations in which the coefficients don't lend themselves to elimination or substitution methods, we prefer matrix methods to find a solution. A suitable calculator makes this relatively easy.