Hey I need help with my math homework, anyone willing to help me please! I can't understand it thanks.
1. Sam bought 1/2 pound of cheese. The cheese costs $3.58 a pound. He also bought three energy bars. Each energy bars costs $1.25. What was the total cost?

2. Toothpaste costs $2.69. Dental floss costs $1.29. Soap costs $.49 a bar. Elvin bought one of each item. He has $10 and a 50 cent coupon for the toothpaste. How much does he have left?

3. Jana won $100 in a contest. She decided to spend some of the money on a new camera. She put's the rest in savings. She bought the camera for $49.00, three packs of film for $4.39 each, and a camera case for $19.89 How much did she put in savings?

4. Justin wanted to buy five notebooks for $2.89 each, a protractor for $3.25, and a mechanical pencil for $3.50 He has $20. How much more did he need.

5. Pens cost $3.75 for three. Pencils are $2.50 a dozen. Paper is $4.39 a box. Marie bought one pen, a dozen pencils, and a box of paper. What was the total cost?

I know these are many to solve, and I am new to brainly, my classmate reccomended this app. Thanks for taking the time to solve! and Im wasting all my points on this homework help so please guy's solve it asap!

The expression 12 times the sum of the number v/u and 41 in the mathematical form will be 12(v/u + 41).

What is an expression?

The mathematical expression is the combination of numerical variables and operations denoted by addition, subtraction, multiplication, and division signs. Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also be used to denote the logical syntax's operation order and other properties.

Here, we have

Given:  v/u and 41.

We have to find 12 times the sum of a number.

The sum of v/u and 41 is v/u + 41, then 12 times this sum is written as below:-

= 12(v/u + 41)

Hence, the expression 12 times the sum of the numbers v and 41 in the mathematical form will be 12(v + 41).

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Answer:

The homeowner’s insurance company will pay for the damages after the homeowner pays the deductible of $1,175 for each claim. Therefore, the amount that the homeowner’s insurance company will pay for the damages is $42,500 - $1,175 = $41,325.

I hope that helps! (´▽`ʃ♡ƪ)

Step-by-step explanation:

So, the matrix representation of T relative to the basis B = {f1, t, t²} is:
| 2.5  3  0 |
|  0   4  0 |
|  0   0  6 |

To find the matrix representation of the linear transformation T relative to the basis B = {f1, t, t²}, we need to apply T to each element of the basis and then express the result as a linear combination of the basis elements.
Let's apply T to each element of the basis B:
1. T(f1) = T(1) = 2(1) + 0.5(1) = 2.5
2. T(t) = T(c) = 3(c) + 4(c²) = 3f1 + 4t
3. T(t²) = T(c²) = 6(c²) = 6t²
Now, we can express the results as linear combinations of the basis elements:
1. T(f1) = 2.5f1 + 0t + 0t²
2. T(t) = 3f1 + 4t + 0t²
3. T(t²) = 0f1 + 0t + 6t²
Finally, we can form the matrix representation of T relative to the basis B by using the coefficients of the linear combinations as the columns of the matrix:
T matrix = | 2.5  3  0 |
                  |  0   4  0 |
                  |  0   0  6 |

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The matrix representation of t with respect to the basis b = [tex]{f1, t, t^2}[/tex] is:

[1/2   -4/3      1 ]

[1       8/3      0 ]

[0     -5/2   3/2 ].

To find the matrix representation of the linear transformation t with respect to the given basis, we need to apply t to each of the basis vectors and represent the result as a linear combination of the basis vectors.

The coefficients of these linear combinations will form the columns of the matrix representation.

First, we apply t to each of the basis vectors:

[tex]t(1) = a0 + a1t + a2t^2 = a0 + a1f1 + a2t - (a1/2)f1 - (3a2/2)t^2[/tex]

[tex]t(t) = a0 + (4/3)a1t + (5/6)a2/t = a0 + (4/3)t + (5/6)t^2 - (4/3)f1 - (5/2)t^2[/tex]

[tex]t(t^2) = a0 + (3/2)a2/t^3 = a0 + (3/2)t^2 - (3/2)f1[/tex]

Next, we represent these results as linear combinations of the basis vectors:

[tex]t(1) = (a0 - a1/2)f1 + (a1 + a2)t - (3a2/2)t^2[/tex]

[tex]= 1f1 + 0t + 0t^2 + (-1/2)f1 + 1t + 0t^2 + 0f1 - (3/2)t^2[/tex]

[tex]= (1/2)f1 + 1t - (3/2)t^2[/tex]

[tex]t(t) = (-4/3)f1 + (a0 + 4/3)t + (5/6)t^2[/tex]

[tex]= 0f1 + 1t + 0t^2 + (-4/3)f1 + (4/3)t + (5/6)t^2 + 0f1 + 0t - (5/2)t^2[/tex]

[tex]= (-4/3)f1 + (8/3)t - (5/2)t^2[/tex]

[tex]t(t^2) = f1 + (a0 - 3/2)t^2[/tex]

[tex]= 0f1 + 0t + 1t^2 + 1f1 + 0t + 0t^2 + 0f1 + (1/2)t^2[/tex]

[tex]= 1f1 + 0t + (3/2)t^2[/tex]

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The measure of angle A and angle B are 28.61 and 61.39 rounded to two decimal place, using trigonometric ratio of tangent for the respective angles.

The trigonometric ratios is concerned with the relationship of an angle of a right-angled triangle to ratios of two side lengths.

The basic trigonometric ratios includes;

sine, cosine and tangent.

tan B = 6/11 {opposite/adjacent}

B= tan⁻¹(6/11) {cross multiplication}

B = 28.6105.

tan A = 11/6 {opposite/adjacent}

A= tan⁻¹(11/6) {cross multiplication}

A = 61.3895.

Therefore, the measure of angles A and B are 28.61 and 61.39 rounded to two decimal place, using trigonometric ratio of tangent for the respective angles.

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It has been proved that the lines MN and PR are parallel because they have the same slope.

We are given the coordinates of the points P, Q and R as:

P(-3, -6)

Q(1, 4)

R(5, -2)

Since M is the midpoint of PQ, we have:

M = (-3 + 1)/2, (-6 + 4)/2

M = (-1, -1)

N is the midpoint of QR and so:

N = (1 + 5)/2, (4 - 2)/2

N = (3, 1)

Slope of MN = (1 + 1)/(3 + 1) = 1/2

Slope of PR = (-2 + 6)/(5 + 3)

Slope of QR = 4/8 = 1/2

Both slopes are equal and as such they are parallel lines

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On that particular day, approximately 272.32 BTUs of heat were transferred through the wall.

To calculate the amount of heat transferred through the walls on a particular day, we can use the formula:

Q = U × A × deltaT

where Q is the heat transferred (in BTUs), U is the overall heat transfer coefficient (in BTU/hr·ft^2·°F), A is the area of the wall (in ft^2), and deltaT is the temperature difference between the inside and outside of the wall (in °F).

First, let's calculate the area of the wall. The room has four walls, but we are only interested in the heat transferred through the wall with an R-value of 15. We can calculate the area of this wall as follows:

Area = Length × Height = 13 ft × 9 ft = 117 ft^2

Next, we need to calculate the overall heat transfer coefficient, U. The U-value is the reciprocal of the R-value, so:

U = 1 / R = 1 / 15 = 0.0667 BTU/hr·ft^2·°F

Now we need to calculate the temperature difference between the inside and outside of the wall. We are given that the outside temperature is 36 °F, but we don't know the inside temperature. Let's assume that the inside temperature is 70 °F, which is a typical room temperature. Then the temperature difference is:

deltaT = 70 °F - 36 °F = 34 °F

Finally, we can plug these values into the formula:

Q = U × A × deltaT

Q = 0.0667 BTU/hr·ft^2·°F × 117 ft^2 × 34 °F

Q ≈ 272.32 BTUs

Therefore, on that particular day, approximately 272.32 BTUs of heat were transferred through the wall.

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Answer:

Step-by-step explanation:

In log25 5 = x, the little number is the base and the x is the exponent.

25^x = 5

x = 1/2

The annual percentage rate is approximately 9.97% when rounded to the nearest hundredth of a percent.

To find the annual percentage rate (APR), we can use the following formula:

APR = (finance charge / loan amount) / (loan period in years) x 100%

First, let's calculate the loan amount by subtracting the finance charge from the total cost of the furniture:

Loan amount = $1,860 - $308.25 = $1,551.75

Next, let's convert the loan period of 2 years to the decimal form of 2:

Loan period = 2 years = 2.0 years

Now we can plug in the values into the formula and solve for the APR:

APR = ($308.25 / $1,551.75) / (2.0) x 100%

APR = 0.0997 x 100%

APR ≈ 9.97%

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Answer:

Can i see the full answer so I can help you?

Step-by-step explanation:

(a) The linear programming model to maximize the profit is written as,

Maximize Z = 2(4x1)(100) + 1.5(6x2)(100) + 4(2x3)(1000) - 2(100x1 + 100x2 + 50x3) - 40(10x1 + 12x2)

(b) The optimal solution is x1 = 0, x2 = 8/3, x3 = 8, x4 = 0, and the maximum profit is $40.

(a) Linear programming model:

Let x1, x2, and x3 be the number of acres allocated to lemon, peach, and cherry trees, respectively. Then, the objective function we want to maximize is:

Maximize Z = 2(4x1)(100) + 1.5(6x2)(100) + 4(2x3)(1000) - 2(100x1 + 100x2 + 50x3) - 40(10x1 + 12x2)

The first term represents the revenue from selling lemons, the second term represents the revenue from selling peaches, the third term represents the revenue from selling cherries, the fourth term represents the cost of fertilizer, and the last term represents the cost of labor.

The constraints are:

x1 + x2 + x3 ≤ 200 (total available land)

10x1 + 12x2 + 10x3 ≤ 20000 (total available labor hours)

x1, x2, x3 ≥ 0 (non-negativity constraints)

(b) Simplex algorithm:

Convert the linear programming model into standard form by introducing slack variables and expressing all variables in terms of these variables.

Maximize Z = 2(4x1)(100) + 1.5(6x2)(100) + 4(2x3)(1000) - 2(100x1 + 100x2 + 50x3) - 40(10x1 + 12x2)

Subject to:

x1 + x2 + x3 + x4 = 200

10x1 + 12x2 + 10x3 + x5 = 20000

x1, x2, x3, x4, x5 ≥ 0

In this case, the entering variable is x1, as it has the highest coefficient in the objective function.

Step 5 (continued):

1.6 0.1 0 1 -48 32 <- Z

0.4 0.9 1 1/10 0 40 <- x1

8.4 3.3 0 -1/10 1 1840 <- x5

The entering variable is x3, as it has the highest coefficient in the objective function.

The leaving variable is x1, as it has the smallest ratio of RHS to its coefficient in the x3 column.

x2 x1/12 x3 x5/120 x4 RHS

2.5 1/5 0 -1/60 0 40 <- Z

0.5 -1/5 1 1/60 0 8 <- x3

0.5 2/15 0 1/60 1/10 8/3 <- x2

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The weighted mean of the RORs for each portfolio, from best to worst, is:

Portfolio 3: 4.36%

Portfolio 2: 3.2%

Portfolio 1: 0.94%

To calculate the weighted mean of the RORs for each portfolio, we need to multiply each rate of return by its corresponding portfolio value, sum the results, and divide by the total value of the portfolios:

Weighted Mean ROR = sum of value / total amount

sum of value = portfolio value x rate of return

For Portfolio 1:

(0.089 x 850) + (-0.051 x 2425) + (0.124 x 280) + (0.042 x 1400) + (0.009 x 2330)

Sum of value = 75.65 - 123.68 + 34.72 + 58.8 + 20.97

                      = 61.46.

Weighted Mean ROR = 61.46 / (850 + 2425 + 280 + 1400 + 2330)

                                    = 61.46 / 7285

                                    = 0.0094 or 0.94% (third)

For Portfolio 2:

(0.089 x 1050) + (-0.051 x 1950) + (0.124 x 1295) + (0.042 x 745) + (0.009 x 1050)

Sum of value = 93.45 - 99.45 + 160.58 + 31.29 + 9.45

                      = 195.32.

Weighted Mean ROR = 195.32 / (1050 + 1950 + 1295 + 745 + 1050)

                                    = 195.32 / 6090

                                    = 0.032 or 3.2% (second)

For Portfolio 3:

(0.089 x 1175) + (-0.051 x 550) + (0.124 x 860) + (0.042 x 550) + (0.009 x 2000)

Sum of value = 104.58 - 28.05 + 106.64 + 23.1 + 18

                      = 224.27.

Weighted Mean ROR = 224.27 / (1175 + 550 + 860 + 550 + 2000)

                                    = 224.27 / 5,135

                                    = 0.0436 or 4.36% (first)

To compare the overall performance of the portfolios, we can rank them based on their weighted mean RORs, from highest to lowest:

Portfolio 3: 4.36%

Portfolio 2: 3.2%

Portfolio 1: 0.94%

Therefore, the overall performance of the portfolios, from best to worst, is Portfolio 3, Portfolio 2, and Portfolio 1.

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The major flaw of the linear probability model is, Option d, which allows predicted values to range from above 1 to below 0

The binary dependent variable, which accepts values of 0 and 1, and the independent variables are assumed to have a linear relationship under the linear probability model.

The anticipated values from the linear probability model, however, can range from 0 to 1, and in some circumstances, they can be either above or below 0. This goes against the dependent variable's probabilistic character and can produce inaccurate forecasts.

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V=π(d

2)2h=π·(20.12

2)2·6.4≈2034.42618m

Answer:

3 & 4

Step-by-step explanation:

Since you have 3 choice, you want to pick the options that can represent 3 options.

1. False, since a coin only has 2 sides.

2. False, black and red is two halves of a deck, meaning you only have 2 options.

3. True, 6 is divisible by three, so it can be used. Assuming each choice is represented by two number.

4. True, 3 choices is evenly represented by 3 sections

The surface area of the pyramid is 44.2 square inches, which is closest to option (C) 44.2.

To solve the problem, we can start by using the formula for the area of an equilateral triangle to find the length of one side of the base. Let s be the length of one side of the base, then we have:

Area of the base = (sqrt(3)/4) * s^2 = 13

Solving for s, we get:

s^2 = (4 * 13) / sqrt(3)

s = 8.0

Therefore, the perimeter of the base is 3 * s = 24 inches

Next, we can use the formula for the surface area of a pyramid to find the surface area of the entire pyramid. Let B be the area of the base, then we have:

Surface area = B + (1/2) * P * h

where P is the perimeter of the base and h is the height of the pyramid.

Substituting the given values, we get:

Surface area = 13 + (1/2) * 4.8 * 13

Surface area = 13 + 31.2

Surface area = 44.2 square inches

Therefore, the surface area of the pyramid is 44.2 square inches, which is closest to option (C) 44.2.

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A relationship that proves why ADC and BCD are congruent include the following: D. HL.

In Mathematics, the Right Triangles Similarity Theorem states that when the altitude of a triangle is drawn to the hypotenuse of a right angled triangle, then, the two (2) triangles that are formed would be similar to each other, as well as the original triangle.

In Mathematics, HL is an abbreviation for hypotenuse leg and it can be defined as a theorem which states that if the hypotenuse and one (1) leg in a right-angled triangle are congruent to the hypotenuse and leg of another right-angled triangle, then the two (2) triangles would be congruent.

By applying the hypotenuse leg (HL) theorem across right-angles BCD (∠BCD) and ADC (∠ADC), we have the following;

ΔAC ≅ ΔBD

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Answer:

SAS

Step-by-step explanation:

The correct answer is c. Line graphs show the change in one or more variables progressively across time.

Histograms show the distribution of data, pie charts show the proportions of a whole, bar charts compare categories or groups, and diagrams show the relationships between different elements.

The correct answer is c. Line graphs show the change in one or more variables progressively across time

A histogram is a visual depiction of data distribution in statistics. The histogram is shown as a collection of neighbouring rectangles, where each bar represents a certain type of data. Numerous fields use statistics, which is a branch of mathematics. Frequency, which can be expressed as a table and is known as a frequency distribution, is the repeating of numbers in statistical data.

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Line graphs show the change in one or more variables progressively across time. C

A line graph is a type of chart that displays data as a series of data points connected by straight lines.

The horizontal axis of the graph typically represents time, while the vertical axis represents the value of the variable being measured.

By connecting the data points with lines, a line graph can show the trend or pattern of change in the variable over time.

Line graphs are commonly used in fields such as economics, finance, and science to visualize trends in data over time.

They can be used to identify patterns, compare different variables, or forecast future trends.

In contrast, histograms, pie charts, bar charts, and diagrams are different types of charts that are used to display data in different ways.

Histograms are used to show the distribution of data within a single variable, while pie charts and bar charts are used to compare different categories or groups of data.

Diagrams are used to represent complex systems or relationships, often using visual symbols or icons to represent different components.

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the correct answer is A.

5,220,000 songs were downloaded in the year 2020.

The interpretation of s(2020) = 5,220,000 is "5,220,000 songs were downloaded in the year 2020".

Therefore, the correct answer is A. 5,220,000 songs were downloaded in the year 2020.

Interpretation refers to the process of explaining or giving meaning to information, data, or phenomena. It involves analyzing and making sense of information to draw conclusions or make decisions based on the findings.

Interpretation can involve subjective judgment and may depend on the perspective, assumptions, or biases of the interpreter.

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Using a trigonometric relation we can see that the correct option is the last one;

4. 348.5 ft​

We have a right triangle, so we can use trigonometric relations.

The angle at the top of the triangle is a, and it must solve the equation:

a + 19° = 90°

a = 90° - 19° = 71°

Now we can use the trigonometric relation:

tan(a) = (opposite cathetus)/(adjacent cathetus)

REplacing what we know:

tan(71) = ?/120 ft

120ft*tan(71) = ? = 348.5ft

That is the distance.

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The average number of visitor per concert in 2020 as compare to average number of visitors in 2019 is equal to 591 ( approximately ).

Average number of visitors per concert in 2019 was 584,

And the average number of visitors per concert in 2020 increased by 1.2%,

The average number of visitors per concert in 2020 as follows,

Average number of visitors per concert in 2020

= Average number of visitors per concert in 2019 + Increase in average number of visitors per concert

Increase in average number of visitors per concert

= 1.2% of the average number of visitors per concert in 2019

= (1.2/100) x 584

= 7.008

This implies,

The increase in the average number of visitors per concert from 2019 to 2020 is approximately 7.008.

Adding this increase to the average number of visitors per concert in 2019 gives us,

Average number of visitors per concert in 2020

= 584 + 7.008

= 591.008

Rounding this to the nearest whole number, we get,

Average number of visitors per concert in 2020 ≈ 591

Therefore, the average number of visitors per concert in 2020 is approximately 591.

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Null hypothesis: The average lifespan of the heaters is equal to or greater than 5 years

Alternative hypothesis: The average lifespan of the heaters is less than 5 years.

In hypothesis testing, the null hypothesis (H0) is a statement that assumes no significant difference between a sample statistic and a population parameter. The alternative hypothesis (Ha) is a statement that contradicts the null hypothesis and asserts that there is a significant difference between the sample statistic and the population parameter.

In this scenario, the company claims that its heaters last less than 5 years. We can express this claim as the alternative hypothesis (Ha), which states that the average lifespan of the heaters is less than 5 years.

On the other hand, the null hypothesis (H0) is a statement that assumes that the average lifespan of the heaters is equal to or greater than 5 years. This is the default assumption until evidence is found to support the alternative hypothesis.

To test these hypotheses, we would collect a sample of heaters and measure their lifespans. We would then calculate the sample mean and compare it to 5 years. If the sample mean is significantly less than 5 years, we would reject the null hypothesis and conclude that the average lifespan of the heaters is less than 5 years.

In summary, the null and alternative hypotheses for this scenario are:

Null hypothesis (H0): The average lifespan of the heaters is equal to or greater than 5 years.

Alternative hypothesis (Ha): The average lifespan of the heaters is less than 5 years

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Answer: 228 yards

Step-by-step explanation:

Answer:

228

Step-by-step explanation:

The original fraction is x/(2x) = 4/8, which simplifies to 1/2.

Let the numerator of the original fraction be x and the denominator be 2x (since the numerator and denominator are in the ratio of 1:2).

When the numerator is decreased by two, the new numerator is x - 2. When the denominator is multiplied by two, the new denominator is 4x.

We know that the simplified value of the new fraction is 3/8, so we can write the following equation:

(x - 2)/(4x) = 3/8

To solve for x, we can cross-multiply:

8(x - 2) = 3(4x)

8x - 16 = 12x

4x = 16

x = 4

Therefore, the original fraction is x/(2x) = 4/8, which simplifies to 1/2.

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quadratic inequality

Answer:

3

Step-by-step explanation:

5x + 2(x-3) =5x + 2(3-x)

or，5x＋2x－6＝5x＋6－2x

or，7x－6＝3x＋6

or，4x＝12

or，×＝3

The depreciation rate of Nancy is 15%.

Depreciation is the reduction in the value of an asset over time due to wear and tear, obsolescence, or other factors. It is a non-cash expense that is recorded on a company's income statement, which reflects the decrease in the asset's value during its useful life. Depreciation is commonly used in accounting to allocate the cost of an asset over its useful life, and it helps businesses to accurately reflect the true value of their assets on their financial statements.

In mathematics, a function is a relation between a set of inputs and a set of possible outputs with the property that each input is related to exactly one output.

The given function V(t) = [tex](30000*0.85)^{t}[/tex]represents the value of Nancy's car after t years.

Depreciation rate is the rate at which the value of an asset decreases over time. In this case, the depreciation rate of Nancy's car is 1 - 0.85 = 0.15 or 15%.

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Using the functions f(x) and g(x) as F(x)=x²-16; g(x)=x+4, (f/g)(x) = (x^2 - 16)/(x + 4) when x = -4. So, the correct answer is option D.

To find (f/g)(x), we need to divide f(x) by g(x). The notation (f/g)(x) is another way of representing the function f(x)/g(x).

So, we first need to find f(x)/g(x) by dividing f(x) by g(x):

f(x)/g(x) = (x^2 - 16)/(x + 4)

Now, we can plug in the values of x in each option and see which one gives us the correct function.

Option A: (f/g)(-4) = ((-4)^2 - 16)/(-4 + 4) = undefined

Option B: (f/g)(4) = (4^2 - 16)/(4 + 4) = -1

Option C: (f/g)(4 - 4) = (0^2 - 16)/(4 - 4) = undefined

Option D: (f/g)(-4 - 4) = ((-4)^2 - 16)/(-4 - 4) = 0

Therefore, the correct answer is option D: (f/g)(x) = (x^2 - 16)/(x + 4) when x = -4.

Note that options A and C give undefined values because they have x + 4 in the denominator, which makes the function undefined at x = -4 and x = 4, respectively.

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Answer:

A = 40 in²

Step-by-step explanation:

the area (A) of a trapezoid is calculated as

A = [tex]\frac{1}{2}[/tex] h (b₁ + b₂)

where h is the height between the bases b₁ and b₂

here h = 8 , b₁ = 4 , b₂ = 6 , then

A = [tex]\frac{1}{2}[/tex] × 8 × (4 + 6)

   = 4 × 10

   = 40 in²

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