HELP! WILL GIVE BRAINLEST! An angle of 1. 5 rad intercepts an arc on the unit circle. What is the length of the intercepted arc?

The height of the pile of books in terms of a and b is 4a cm + 2b cm.

To find the height of the pile of books in terms of a and b, we need to multiply the number of books by the thickness of each book. Since there are (2a+b) books in the pile and the thickness of each book is 2cm, the height of the pile can be expressed as:

(2a+b) x 2cm

Expanding this expression, we get:

4a cm + 2b cm

Therefore, the height of the pile of books in terms of a and b is 4a cm + 2b cm. This means that for every additional 'a' book, the height of the pile will increase by 4cm and for every additional 'b' book, the height of the pile will increase by 2cm.

It's important to note that this formula assumes that all the books are the same size and have the same thickness. If there are any variations in size or thickness, the formula may not accurately represent the height of the pile. Additionally, it's important to ensure that all units of measurement are consistent (in this case, cm for both the thickness of the book and the height of the pile).

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The length of the platform is given by the expression -2 + sqrt(3x^2 + 10x) meters.

Let's start by using the formula for the area of a rectangle, which is:

Area = length x width

We are given that the width of the platform is (x+4) meters, so we can write:

Area = length x (x+4)

We are also given that the area of the platform is 3x^2+10x−8, so we can set these two expressions equal to each other and solve for the length:

3x^2+10x−8 = length x (x+4)

Expanding the right side, we get:

3x^2+10x−8 = length x^2 + 4length

Subtracting 4length from both sides, we get:

3x^2+10x−8−4length = length x^2

Rearranging, we get a quadratic equation:

length x^2 + 4length − 3x^2 − 10x + 8 = 0

To solve for length, we can use the quadratic formula:

length = (-b ± sqrt(b^2 - 4ac)) / 2a

where a = 1, b = 4, and c = -3x^2 - 10x + 8. Plugging in these values, we get:

length = (-4 ± sqrt(4^2 - 4(1)(-3x^2 - 10x + 8))) / 2(1)

Simplifying under the square root:

length = (-4 ± sqrt(16 + 12x^2 + 40x - 32)) / 2

length = (-4 ± sqrt(12x^2 + 40x)) / 2

length = (-4 ± 2sqrt(3x^2 + 10x)) / 2

length = -2 ± sqrt(3x^2 + 10x)

Since the length must be positive, we take the positive square root:

length = -2 + sqrt(3x^2 + 10x)

Therefore, the length of the platform is given by the expression -2 + sqrt(3x^2 + 10x) meters.

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We can start by finding the cost per gallon of gas for each person:

Javier: 5.6 gallons of gas for $26.96, so cost per gallon = 26.96/5.6 = $4.79/gallon

Ellema: 13.2 gallons of gas for $48.62, so cost per gallon = 48.62/13.2 = $3.68/gallon

Now we can find the cost of just the car wash for each person:

Javier: $26.96 - (5.6 gallons * $4.79/gallon) = $-1.344, which doesn't make sense. It's possible there was a mistake in the numbers given.

Ellema: $48.62 - (13.2 gallons * $3.68/gallon) = $1.958, which also doesn't make sense. There may be an error in the given information.

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The approximate area of the triangle is 21. 5 square units (option c).

Triangles are three-sided polygons that can have different shapes and sizes. Now, let's focus on your question about finding the area of a triangle.

To begin with, the area of a triangle is given by the formula:

Area = (base × height) ÷ 2

where the base is the length of the side that is perpendicular to the height. The height, on the other hand, is the distance between the base and the opposite vertex.

In your problem, the base of the triangle is given as 7 units, and the height is given as 6.1 units. So, we can substitute these values into the formula to get:

Area = (7 × 6.1) ÷ 2

Area = 21.35 square units

Therefore, the approximate area of the triangle is 21.35 square units. In the answer choices provided, the closest option is C, which is 21.5 square units.

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Complete Question:

What is the approximate area of the triangle when base = 7 and height = 6.1?

A. 12. 5 square units

B. 18 square units

C. 21. 5 square units

D. 31 square units

The total cost to buy t movie tickets for $8.50 each is o only one, the number of ounces of tomato juice, j, in 2 quarts o only one, the number of pizzas to order, p, if each person eats 2 slices more than one, the greatest number of $6 notebooks, n, ed can buy with $36 only one, and the area, a, of a wall with a length of 5 meters and a height of 3 meters o only one.

1. The total cost to buy t movie tickets for $8.50 each:
- Only one value for the variable

The cost to buy a specific number of movie tickets at a fixed price will have only one total cost value.

2. The number of ounces of tomato juice, j, in 2 quarts:
- Only one value for the variable

There are 32 ounces in a quart, so 2 quarts will always have 64 ounces.

3. The number of pizzas to order, p, if each person eats 2 slices:
- More than one value for the variable

The number of pizzas needed depends on the number of people attending, which can vary, leading to different values for p.

4. The greatest number of $6 notebooks, n, Ed can buy with $36:
- Only one value for the variable

Since each notebook costs $6, Ed can buy exactly 6 notebooks with $36 (36/6 = 6).

5. The area, a, of a wall with a length of 5 meters and a height of 3 meters:
- Only one value for the variable

The area of a rectangle is calculated by multiplying its length and height. In this case, the area will always be 15 square meters (5m x 3m = 15m²).

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Answer:

The answer is A. 135 cm2.

Area of a parallelogram is base * height. In this case, the base is 24 cm and the height is 9 cm. Therefore, the area is 24 * 9 = 135 cm2.

Answer: the answer would be 360

Step-by-step explanation:

the equation for area of a parallelogram is base x height.

The base is 24 as it is at the top of the shape.

The height is 15 as well since a parallelogram is congruent.

multiply the two and it gives you 360

The student's use of the t procedure for a confidence interval was appropriate because the sample size was greater than 30 and the population standard deviation was unknown. A 95% confidence interval was calculated using the t-distribution.

It was an appropriate use of the t procedure for a confidence interval. The student wanted to assess the average time spent studying for his most recent exam taken in class, and he used a sample of 45 students to estimate the population mean with a 95% confidence interval.

Since the population standard deviation is not known, the student used the t-distribution to calculate the confidence interval. The t-distribution is used when the sample size is small, and the population standard deviation is unknown.

The student assumed that the sample was randomly selected, and the data was approximately normally distributed. By using the t procedure, the student was able to estimate the population mean with a margin of error and a level of confidence of 95%.

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We can use the distance formula to find the distance between two points in a coordinate plane:

d = √[(x2 - x1)² + (y2 - y1)²]

where (x1, y1) and (x2, y2) are the coordinates of the two points, and d is the distance between them.

Using the given coordinates of the two points, we have:

x1 = -2, y1 = 7

x2 = -5, y2 = 9

Substituting these values into the distance formula, we get:

d = √[(-5 - (-2))² + (9 - 7)²]

d = √[(-3)² + 2²]

d = √(9 + 4)

d = √13

Therefore, the distance between the points (-2, 7) and (-5, 9) is approximately √13 units. We can also approximate this value as 3.61 units (rounded to two decimal places).

To find the surface area of a prism, you need to add up the area of all of its faces. The formula for the surface area of a rectangular prism is 2lw + 2lh + 2wh, where l is the length, w is the width, and h is the height. Make sure that all of these measurements are in the same units, such as inches or centimeters.

Once you have calculated each of the areas, add them together to get the total surface area of the prism. Make sure to include the units in your answer, which will be in square inches or in2.

You will need to know its dimensions and follow these steps:

1. Determine the shape and dimensions of the base and top faces.
2. Calculate the area of the base and top faces.
3. Determine the shape and dimensions of the lateral faces.
4. Calculate the area of the lateral faces.
5. Add the areas of all the faces to find the total surface area.

Without specific dimensions, I cannot provide a numerical answer. However, once you have the dimensions, follow the steps above to find the surface area of the prism in square inches (in²).

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Answer:

12

Step-by-step explanation:

Length AC is the total length between ABC

If we already know BC=9, and we're solving for AB, then we just subtract the total amount (AC) from BC

21-9

We get 12

Answer: 1 1/4 yards

Step-by-step explanation: To convert from feet to yards, divide the value in feet by 3. So, 3 3/4 ft = (3 3/4)/3 = 1.25 yd (exactly).

Answer:

5/4 yards

Step-by-step explanation:

Convert feet to fraction.

[tex]3+\frac{3}{4} =\frac{(3)(4)+3}{4} =\frac{15}{4}[/tex] ft.

If we know that each yard equals 3 feet, divide by 3:

[tex]\frac{\frac{15}{4} }{3} =\frac{15}{(4)(3)} =\frac{15}{12}[/tex]

Simplified:

[tex]\frac{5}{4}[/tex]  yards

Hope this helps.

Answer:

40 meters

Step-by-step explanation:

Let's assume the width of the garden is x meters, then the length of the garden would be (x+10) meters since we know that the length is 10 meters more than the width.

We also know that the area of the garden is 100 square meters, therefore:

Area = Length x Width

100 = (x+10) x x

Expanding the equation we get:

100 = x^2 + 10x

Rearranging the terms we have:

x^2 + 10x - 100 = 0

Solving for x using the quadratic formula, we get:

x = 5 or x = -20

Since the width cannot be negative, we discard the negative solution and conclude that the width of the garden is 5 meters. Therefore, the length of the garden is (5+10) = 15 meters.

The perimeter of the garden is the sum of the four sides, which is:

Perimeter = 2 x (Length + Width)

Perimeter = 2 x (15 + 5)

Perimeter = 2 x 20

Perimeter = 40 meters

Therefore, the perimeter of the garden is 40 meters.

Answer:

Let's start by using algebra to solve for the width of the garden:

- Let w be the width of the garden.

- Then the length of the garden is w + 10.

- The area of the garden is length x width, so we can write the equation: (w + 10)w = 100.

- Expanding the left side of the equation, we get: w^2 + 10w = 100.

- Rearranging the equation, we get: w^2 + 10w - 100 = 0.

- Factoring the left side of the equation, we get: (w + 20)(w - 10) = 0.

- Solving for w, we get: w = -20 or w = 10. Since the width cannot be negative, we have w = 10.

Now that we know the width of the garden is 10 meters, we can find the length by adding 10 meters:

- Length = width + 10 = 10 + 10 = 20 meters.

Finally, we can find the perimeter of the garden by adding up the lengths of all four sides:

- Perimeter = 2(length + width) = 2(20 + 10) = 2(30) = 60 meters.

Therefore, the perimeter of the garden is 60 meters.

The proportion that can be used to show that the slope of uw is equal to the slope of wy is B) 2-8 -1-2.

Let the angles opposite to sides UV, VW, and WU be denoted by theta1, theta2, and theta3, respectively, in triangle UVW. Similarly, let the angles opposite to sides WY, YX, and XW be denoted by theta4, theta5, and theta6, respectively, in triangle WXY. Since triangles UVW and WXY are similar right triangles, we have:

theta1 = theta4 = 90 degrees (both triangles are right triangles)

theta2 = theta5 (corresponding angles in similar triangles are equal)

theta3 = theta6 (corresponding angles in similar triangles are equal)

UW/VW = WY/YX (sides in similar triangles are proportional)

The slope of uw is given by the rise over run or (VU - UW)/(WV), and the slope of wy is given by the rise over run or (XY - WY)/(YW). Using the similar triangles proportion, we can substitute UW/VW = WY/YX and simplify to get (VU - UW)/(WV) = (XY - WY)/(YW). This equation shows that the slope of uw is equal to the slope of wy.

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Answer:

C) 1,050

Step-by-step explanation:

We can see that to get from 8.4 to 42 and to get from 42 to 210, we have to multiply by 5.

To complete the sequence, multiply 210 by 5

210·5

=1,050

Hope this helps!

The z-score for the 90th percentile is approximately 1.28, for the 62nd percentile is approximately 0.31, and for the first quartile (25th percentile) is approximately -0.67.

To calculate the percentiles for this dataset, we need to use the z-score formula. Unfortunately, I cannot directly provide you the responses for the 90th, 62nd, and first quartile percentiles without more information.

However, I can help you understand the process of finding these percentiles:

1. Determine the z-score corresponding to the desired percentile using a z-score table or calculator. For example, the z-score for the 90th percentile is approximately 1.28, for the 62nd percentile is approximately 0.31, and for the first quartile (25th percentile) is approximately -0.67.

2. Use the following formula to find the response corresponding to the z-score:

  Response = Mean + (Z-score × Standard Deviation)

For example, to find the 90th percentile:

  Response = 5.7 + (1.28 × 2.3)

Calculate this for each percentile using their respective z-scores, and you will find the responses you are looking for.

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The number of times of rolling a 5 or a 6 in the fair die is 24

From the question, we have the following parameters that can be used in our computation:

Fair 6-sided die = 72 times

In a 6-sided die, we have

P(5 or 6) = 2/6

When evaluated, we have

P(5 or 6) = 1/3

So, when the die is rolled 72 times, we have

Expected value = 1/3 * 72

Evaluate

Expected value = 24

Hence, the number of times is 24

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None of the provided answer choices are correct, as the correct answer should be 41 lb.

To find the total weight of the box and the presents, you simply add the weights together:

Box weight: 14 lb
Present 1 weight: 15 lb
Present 2 weight: 12 lb

Total weight = 14 lb + 15 lb + 12 lb = 41 lb

None of the provided answer choices are correct, as the correct answer should be 41 lb.

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The expression 148 + 19x³ represents the sum of 148 and the product of a number raised to the third power and 19.

To write the phrase "the sum of 148 and the product of a number raised to the third power and 19" in symbols using the variable x, we can write it as:

148 + 19x³

Here, we are adding 148 to the product of 19 and x raised to the third power. This expression represents the sum of 148 and the product of a number raised to the third power and 19. We can substitute any value for x to get the result of the expression. For example, if x is 2, then the expression becomes:

148 + 19(2³) = 148 + 19(8) = 300

Therefore, the sum of 148 and the product of a number raised to the third power and 19 is represented by the expression 148 + 19x³.

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The relationship between these two variables can be described as inversely proportional.

The variation between the distance that a man walks in one hour and the rate at which the man is walking can be described as inversely proportional.

This means that as the rate at which the man is walking increases, the distance that he walks in one hour decreases. Similarly, as the rate at which he is walking decreases, the distance that he walks in one hour increases.

Therefore, the relationship between these two variables can be described as inversely proportional.

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Answer:

$4139.93

Step-by-step explanation:

Formula for amount accrued at compound interest annually is given by

A = P( 1+ r)ⁿ

where
P = principal
r = interest rate expressed as a decimal
n = number of years

Given P = 3900, r = 1/100 = 0.01, n = 6 we get

A = 3900(1 + 0.01)⁶ = 3900(1.01)⁶ = 4139.93

So the amount accrued after 6 years = $4139.93

There are 20 different ways the students can be chosen for the positions of editor-in-chief and assistant editor-in-chief.

There are 5 students in the newspaper staff, and two positions to fill i.e. editor-in-chief and assistant editor-in-chief. We need to find the number of different ways the students can be chosen for these positions.

To solve this problem, we can use the formula for permutation

We know the formula for Permutation is

[tex]P(n,r)=\frac{n!}{(n-r)!}[/tex]

Here, n=5 and r=2

So, P(5,2) = 5!/(5-2)!

= 5!/3!

= 120/6

= 20

Therefore, there are 20 different ways the students can be chosen for the positions of editor-in-chief and assistant editor-in-chief.

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Guadalupe drove at an average speed of 33.75 miles per hour.

To find the average speed, we need to divide the total distance by the total time:

Average speed = t d/t t

Guadalupe drove 45 miles in 1 1/3 hours, which is the same as 4/3 hours.

So, average speed = 45 miles / (4/3) hours

= 45 x 3/4

= 33.75 miles per hour (rounded to two decimal places)

Therefore, Guadalupe drove at an average speed of 33.75 miles per hour.

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The slope of UF is 1/6

The slope of a line is a measure of its steepness. Mathematically, slope is calculated as "rise over run" (change in y divided by change in x).

The slope is given = change in point on y axis/ change in point on x axis

slope = y2-y1/x2-x1

The cordinate of F = (-2,-3) and U ( 4, -2)

y1 = -3 and y2 = -2

x1 = -2 and x2 = 4

slope = -2-(-3)/4-(-2)

= -2+3/(4+2)

= 1/6

therefore the slope of UF is 1/6

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The estimated quantity of the substance at t = 1.9 is approximately 35.3 units.

To estimate the quantity of the substance at t = 1.9 using linear approximation, we can use the formula:

ΔR ≈ dR/dt * Δt

Given the point R(2) = 35 and the differential equation dR/dt = -1/5(R – 20), we can first find the value of dR/dt at t = 2.

dR/dt(2) = -1/5(R(2) – 20) = -1/5(35 – 20) = -1/5(15) = -3

Now, we can calculate Δt, which is the difference between the given t-value (2) and the desired t-value (1.9):

Δt = 1.9 - 2 = -0.1

Next, we can calculate ΔR using the linear approximation formula:

ΔR ≈ dR/dt * Δt ≈ -3 * (-0.1) = 0.3

Finally, we can estimate the quantity of the substance at t = 1.9 by adding ΔR to the given value of R(2):

R(1.9) ≈ R(2) + ΔR ≈ 35 + 0.3 = 35.3

Therefore, the estimated quantity of the substance at t = 1.9 is approximately 35.3 units.

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The sale's person commission from the sale of $37,000 worth of furnaces is $2,220. If this is doubled, he would have $4,440.

If the salesperson's commission from the sale of $37,000 is at the rate of 6%, then we will do the following:

6/100 × $37,000 = $2,220

If sales, double, we will now record the amount, 74,000. Now 6% of 74,000 will be $4,440. So, the resultant amount, if the salesperson was to increase his sales to double the original, will be $4,440.

This follows a simple logic. When you have a number and are told to double it, you simply multiply by 2. In the same manner, we multiply the salesperson's commission by 2.

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Step-by-step explanation:

1. To find the mean number of rebounds Jamie had per game, we need to add up all the rebounds she had and then divide by the total number of games played:

Mean = (8 + 12 + 8 + 11 + 15 + 6 + 9 + 8 + 10 + 13) / 10

Mean = 100 / 10

Mean = 10

Therefore, the mean number of rebounds Jamie had per game was 10.

2. To find the median number of rebounds Jamie had for her final 10 games, we need to first arrange the data in order from least to greatest:

6, 8, 8, 8, 9, 10, 11, 12, 13, 15

Since there are an even number of data points, the median will be the average of the two middle values, which are 9 and 10:

Median = (9 + 10) / 2

Median = 9.5

Therefore, the median number of rebounds Jamie had for her final 10 games was 9.5.

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Buy yellow or green ticket for best chance of winning.

To determine which color ticket to buy, we need to calculate the probability of winning with each color.

First, we need to determine the total number of possible combinations of one ticket of each color. This can be calculated by multiplying the number of tickets of each color together:

Total number of possible combinations = 369 x 488 x 523 x 331 = 39,123,833,144

Next, we need to determine the probability of winning with each color. Since there are four identical prizes, the probability of winning with any one color is the same. We can calculate the probability of winning with a specific color by dividing the number of tickets of that color by the total number of possible combinations:

Probability of winning with blue ticket = 369 / 39,123,833,144 ≈ 0.00000943

Probability of winning with green ticket = 488 / 39,123,833,144 ≈ 0.00001248

Probability of winning with yellow ticket = 523 / 39,123,833,144 ≈ 0.00001337

Probability of winning with red ticket = 331 / 39,123,833,144 ≈ 0.00000846

From the calculations above, we can see that the highest probability of winning is with the yellow ticket, followed closely by the green ticket. Therefore, if we want to maximize our chances of winning one of the prizes, we should buy the yellow or green ticket.

It's important to note that the difference in probabilities between the yellow and green tickets is very small, so the decision of which color to choose ultimately depends on personal preference.

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The matrix that represents a dilation by a factor of 3 followed by a reflection over the horizontal axis is given as follows:

[tex]\left[\begin{array}{cc}3&0\\0&-3\end{array}\right][/tex]

A dilation can be defined as a transformation that multiplies the distance between every point in an object and a fixed point, called the center of dilation, by a constant factor called the scale factor.

The scale factor for this problem is given as follows:

k = 3.

Hence the matrix is:

[tex]\left[\begin{array}{cc}3&0\\0&3\end{array}\right][/tex]

For the reflection over the horizontal axis, we have that the y-coordinate is multiplied by -1, hence the matrix rule is:

[tex]\left[\begin{array}{cc}3&0\\0&-3\end{array}\right][/tex]

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Answer: To have infinitely many solutions, the equation must be true for all values of x. In other words, the left side and right side of the equation must be equivalent, meaning that the coefficients of x on both sides of the equation must be equal, and the constant terms on both sides must be equal.

We can simplify the given equation as follows:

5(x + 3) = a(x + 4) + 3x + b

5x + 15 = ax + 4a + 3x + b

Simplifying further, we get:

8x + 4a + b = 5x + 15

Rearranging terms, we get:

3x + 4a + b - 15 = 0

For this equation to have infinitely many solutions, the coefficients of x on both sides must be equal to zero, meaning that:

3 = 0

This is not possible, so the equation cannot have infinitely many solutions for any values of a and b.

Therefore, there are no values of a and b for which the given equation will have infinitely many solutions.

The only option that represents the universal set from the subsets is:

B: A set of cricket players of the school.

The universal set is defined as a set that is said to consist of all the elements or objects, which includes its own elements. This universal set is represented by just a symbol 'U'

Now, a subset is also defined as a part of the universal set which is basically a group under the universal set.

Now, from the given options, the only one that could possible represent a universal set of all the options given is "a set of cricket players of the school."

Therefore we conclude that Option B provides the correct answer to the universal set definition.

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