Find the area of the regular polygon below and round your answer to the nearest tenth.

Explain your reasoning. Show all your work.
1) What is the perimeter of the regular polygon?

2) What is the apothem length? Show all your work and explain how you found the apothem.

3) What is the area of the regular polygon? Show your work.

7 sides each side is 10 in long

Answers

Answer 1

The area of the regular polygon is 311.5 in2.

We are given that;

A polygon

Now,

To find the perimeter of the regular polygon, we need to multiply the number of sides by the length of each side. The polygon has 7 sides and each side is 10 in long, so the perimeter is 7 * 10 = 70 in.

To find the apothem length, we need to use some trigonometry.

The central angle is 360/7 degrees, since there are 7 equal angles in a regular polygon. Half of the side length is 5 in, since each side is 10 in long. The apothem is the adjacent side of the right triangle. We can use the tangent function to find the apothem: tan(360/14) = 5/a, where a is the apothem. Solving for a, we get a = 5/tan(360/14) ≈ 8.9 in.

To find the area of the regular polygon, we need to plug in the values of P and a into the formula A = (1/2)P*a.

A = (1/2)708.9 ≈ 311.5 in2.

Therefore, by the area the answer will be 311.5 in2.

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Related Questions

A farmer of a large apple orchard would like to estimate the true mean number of suitable apples produced per tree. He selects a random sample of 40 trees from his large orchard and determines with 95% confidence that the true mean number of suitable apples produced per tree is between 375 and 520. Which of these statements is a correct interpretation of the confidence level?

Approximately 95% of the trees in the orchard contain between 375 and 520 suitable apples.
There is a 95% probability that the true mean number of apples per tree is between 375 and 520.
If many random samples of size 40 are selected from the population of all trees in this large orchard, approximately 95% of the sample means will be between 375 and 520 apples.
If many random samples of size 40 are selected from the population of all trees in this large orchard, about 95% of the intervals would capture the true mean number of suitable apples produced per tree.

Answers

Answer:

The option that the margin of error accounts for in the given interval is sampling variation.

Step-by-step explanation:

What is a formula for the nth term of the given sequence?
Select Explicit Formula for Sequence

Answers

The solution is, the nth term of the sequence is: an = 250 * 0.4(n-1)

To find a formula for the nth term of the sequence 250, 100, 40, we need to first determine the pattern or rule that generates the sequence. If we divide each term by the previous term, we get the following ratios:

100/250 = 0.4

40/100 = 0.4

We can see that each term is obtained by multiplying the previous term by the common ratio of 0.4.

So, the formula for the nth term of the sequence is:

an = a1* r(n-1)

where a1= 250 is the first term, r = 0.4 is the common ratio, and n is the term number.

The solution is, the nth term of the sequence is: an = 250 * 0.4(n-1)

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compplete question:

What is a formula for the nth term of the given sequence 250,100,40

A dairy farm has a real estate tax rate of $57.26 per thousand dollars of assessed
value. If the farm is assessed at $665,500.00 what is the real estate tax?

Answers

To calculate the real estate tax, we can use the following formula:

Real estate tax = (Assessed value / 1000) * Tax rate

Plugging in the values we have:

- Assessed value = $665,500.00
- Tax rate = $57.26 per thousand dollars

Real estate tax = ($665,500.00 / 1000) * $57.26 = $38,107.03

Therefore, the real estate tax for the dairy farm is $38,107.03.

which equation is NOT true?
A -4+(-3) =-7
B -8(2) = -16
C 3-(-2)=5
D -12 ÷ (-3) = -4

Answers

Answer : D

Explanation:

-12 / (-3) equals to **4** not -4

dentify the radius and the center of a circle whose equation is (x – 5)² + y² = 81.
The radius of the circle is units.
The center of the circle is at (, ).

Answers

Answer:

Step-by-step explanation:

General formula

(x-h)^2 + (y-k)^2 = r^2

where (h,k) center of circle whose radius r

applying the formula to our Q

(x – 5)² + y² = 81

(x – 5)² + (y-0)² = 9^2

---> center of circle (5,0)

---> radius is 9

The bar graph above shows the number of T-shirts of different colors sold by a store one week. The following
week, the store had a sale, and sales of each color T-shirt sold increased by about 50 percent from the
previous week. Of the following, which is closest to the number of green T-shirts sold the week of the sale?
0 15
0 20
045
0 60

Answers

The number of green t-shirts sold are 45.

Given that a bar graph showing the sell of t-shirts of 4 different colour,

It is saying that the sell has increased by 50% next week, we need to find the number of green t-shirts to be sold in next week,

So, the number of green t-shirts sold in previous week = 30

So this week the sell should have been increased by 50%

Therefore, the number of green t-shirts sold this week = 150/100 × 30

= 1.5 × 30 = 45

Hence the number of green t-shirts sold are 45.

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103. In a sample of 50 cars at a local dealership,
there are 12 red cars and 10 cars with backup
cameras. Of the 12 red cars, 4 have backup
cameras. If a car is selected at random from
the given sample, what is the probability
that both of the following are true: the car is
not red and does not have a backup camera?
A. 3/5
B. 16/25
C. 19/25
D. 4/5

Answers

Answer:

The correct answer is (D) 4/5.

Step-by-step explanation:

First, we need to find the number of cars that are neither red nor have a backup camera.

Number of cars that are not red = 50 - 12 = 38

Number of cars that do not have a backup camera = 50 - 10 = 40

Number of cars that are neither red nor have a backup camera = 38 + 10 - 50 = 8

Therefore, the probability of selecting a car that is not red and does not have a backup camera is:

P(not red and no backup camera) = 8/50

Simplifying:

P(not red and no backup camera) = 4/25

So the correct answer is (D) 4/5.

The correct answer is D simple

GIVING BRAINLIEST!!!!!! A homeowner is building a circular fire pit in his backyard. He plans to outline the pit with bricks and cover the space inside the pit with sand. The homeowner has decided to build the pit with a diameter of 3 feet.


In order to know how many bricks to buy, the homeowner must know the distance around the outside of the pit. Calculate both the exact distance and the approximate distance.
In order to know how much sand to buy, the homeowner must know how much space needs to be covered inside the pit. Calculate both the exact area and the approximate area.

Answers

Answer:

To calculate the distance around the outside of the circular fire pit (circumference), we can use the formula:

Circumference = π × diameter

Given that the diameter of the pit is 3 feet, we can substitute this value into the formula:

Circumference = π × 3 feet

For the exact distance, we can use the value of π (pi) as 3.14159 (approximately):

Circumference ≈ 3.14159 × 3 feet

Circumference ≈ 9.42477 feet

For the approximate distance, we can round π to 3:

Circumference ≈ 3 × 3 feet

Circumference ≈ 9 feet

To calculate the area inside the circular fire pit, we can use the formula:

Area = π × (radius)^2

The radius is half of the diameter, so in this case, the radius is 1.5 feet.

For the exact area, using π as 3.14159:

Area ≈ 3.14159 × (1.5 feet)^2

Area ≈ 7.06858 square feet

For the approximate area, rounding π to 3:

Area ≈ 3 × (1.5 feet)^2

Area ≈ 6.75 square feet

Therefore, the homeowner would need to buy approximately 9 bricks to outline the pit, and approximately 7.07 square feet of sand to cover the space inside the pit (or approximately 6.75 square feet if rounding to a whole number).

Step-by-step explanation:

the equation T^2=A^3 shows the relationship between a planets orbital period

Answers

The orbital increased by factor [tex]2^3^/^2[/tex] .Hence, correctander is option D by equation  T²=A³

The relationship between a planet’s orbital period(T) and the planet’s mean distance from the sun(A)  is given by equation T²=A³

Given equation is T²=A³

The distance between the planet X and sun is represented by d

Time-period of the planet X:

T²=d³

Distance between planet Y and the sun is represented by d'

d'= 2d

T'²=d'² = (2d)³ = 8d³

On dividing  (1)and (2).

T'/T = 8d³/d³

=8

=2√2

=[tex]2^3^/^2[/tex]

Hence, the orbital increased by factor [tex]2^3^/^2[/tex] .

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The equation T^2=A^3 shows the relationship between a planet’s orbital period, T, and the planet’s mean distance from the sun, A, in astronomical units, AU. If planet Y is twice the mean distance from the sun as planet X, by what factor is the orbital period increased? A. 2^1/3. B. 2^1/2. C. 2^2/3. D. 2^3/2

A pentagonal pyramid.
There are
faces on the solid.

There are
edges on the solid.

There are
vertices on the solid.

Answers

Answer:

A pentagonal pyramid. There are 6 faces on the solid. There are 10 edges and there are 6 vertices on the solid.

What is a pentagonal pyramid?

A pentagonal pyramid is defined as a type of pyramid that has a base with the shape of a regular polygon.

The properties of a pentagonal pyramid include the following:

It has 6 faces. It has 5 triangles as lateral sides. It also has a pentagon at the base.

It has 6 vertices.

It also has 10 edges.

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Benjamin is planning what to wear tomorrow evening.

• He has 3 shirts to choose from: red, white, and green.
• He has 2 pairs of pants to choose from: blue jeans and khaki pants.
• He has 3 pairs of shoes to choose from: sneakers, flip flops, and boots.
Benjamin randomly chooses one item from each group. What is the probability that he chooses
sneakers and the green shirt? Type in simplest form!!! Anything else will be considered correct, no exceptions

Answers

Answer:

1/9

Step-by-step explanation:

P =

[tex](no \: of \: favorable \: outcomes) \div (total \: numeber \: of \: outcomes \: )[/tex]

Please mark as brainliest if this helped

Peace

Suppose you want to purchase a $ 165000 house. If you put 20% down and finance the rest in a 20 year mortgage at an interest rate of 7.5%, what will your monthly payments be?
Monthly payment =

Answers

The monthly payments on the 20 yrs mortgage would be $946.69.

According to the question, the down payment on the house is 20% of $165000, which is:

0.2 * $165,000 = $33,000

The amount that is needed to be financed is:

$165,000 - $33,000 = $132,000

This rate of interest on the payment is 7.5% per year, which is equal to 0.075 as a decimal. We know that the mortgage is for 20 yrs or 240 months:

To calculate the monthly payment, we can use the formula:

monthly payment = [tex][P * r * (1 + r)^n] / [(1 + r)^n - 1][/tex]

where P is the principal amount i.e. the amount being borrowed, r is the monthly interest rate, whereas n is the number of payments.

we need to find the monthly interest rate, for which we can use divide the yearly interest by the number of months in a year, we get:

r = 0.075 / 12 = 0.00625

Now substituting the values into the formula above we get:

monthly payment = [tex][$132,000 * 0.00625 * (1 + 0.00625)^240] / [(1 + 0.00625)^240 - 1][/tex]

monthly payment = $946.69 which is rounded to the nearest cent.

Therefore, the monthly payments on the 20 yrs mortgage would be $946.69.

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Find all the zeros of the polynomial p(x)=x^3+x^2+8x-60
--------------------------
Enter the zeros separated by commas. Enter exact values, not decimal approximations, using square roots as needed.

Answers

The factorization of p(x) is p(x) = (x + 5)^2 (x - 3).

There are different methods to find the zeros of a polynomial, but one common approach is to use the Rational Root Theorem to test possible rational roots and then use polynomial division to factor out the roots found.

The Rational Root Theorem states that if a polynomial with integer coefficients has a rational root p/q (where p and q are integers with no common factors other than 1), then p must divide the constant term and q must divide the leading coefficient.

In the case of p(x) = x³ + x² + 8x - 60, the constant term is -60 and the leading coefficient is 1, so the possible rational roots are of the form p/q, where p is a factor of -60 and q is a factor of 1. Therefore, the possible rational roots are ±1, ±2, ±3, ±4, ±5, ±6, ±10, ±12, ±15, ±20, ±30, ±60.

Since the remainder is not zero, x = 1 is not a root of p(x). We can repeat this process with each possible root until we find all the actual roots.

Using this method, we find that the zeros of p(x) are:

x = -5 (with multiplicity 2) and x = 3.

Therefore, the factorization of p(x) is:

p(x) = (x + 5)² (x - 3)

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Determine the equation of the circle with center
(
0
,
9
)
(0,9) containing the point
(
65
,
12
)
(
65

,12).

Answers

A circle with Centre [tex](a,b)[/tex]  has the general equation:

[tex](x-a)^2 + (y-b)^2 = r^2[/tex]

where [tex]r[/tex] is the radius and [tex](a,b)[/tex] is the Centre.

Given that the Centre is at [tex](0,9)[/tex], the equation is as follows:

[tex](x-0)^2 + (y-9)^2 = r^2[/tex]

If we simplify, we get:

[tex]x^2 + (y-9)^2 = r^2[/tex]

The fact that the circle comprises the coordinates  [tex](65,12)[/tex]  is also provided. Therefore, we may change these values into the equation and find [tex]r[/tex]:

[tex]65^2 + (12-9)^2 = r^2[/tex]

[tex]4225 + 9 = r^2[/tex]

[tex]r^2 = 4234[/tex]

When we square the two sides, we obtain:

[tex]r = \sqrt{4234}[/tex]

The circle's equation is as follows:

[tex]x^2 + (y-9)^2 = 4234[/tex]

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The linear function passes through the point (-1,4) and has a slope of 4. What is the zero of f? Hint: point slope formula.
A: -3
B: 5
C: -2
D: 8

Answers

The zero of f is x = -2. C.

The equation of the linear function can be found using the point-slope formula:

y - y1 = m(x - x1)

m is the slope and (x1, y1) is a point on the line.

Plugging in the given values, we get:

y - 4 = 4(x + 1)

Expanding and simplifying, we get:

y = 4x + 8

The zero of f (where f(x) = y) set y = 0 and solve for x:

0 = 4x + 8

4x = -8

x = -2

The point-slope formula may be used to determine the equation of the linear function:

y - y1 = m(x - x1)

(X1, Y1) is a point on the line, and m is the slope.

With the above variables obtain:

y - 4 = 4(x + 1)

By enlarging and condensing, we obtain:

y = 4x + 8

y = 0, you may solve for x using the zero of f (where f(x) = y):

0 = 4x + 8 4x

= -8 x

= -2

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Betty has a checking account and a non-interest-bearing savings account. Function C represents her checking account balance, where x is the number of months. Function S represents her saving account balance which function represents Betty's total account balance,

Answers

Answer: t(x) or total amount

Step-by-step explanation:

Answer:

Step-by-step explanation:

d

1. Allison is buying a home. It cost her $230,000. She has to put a down payment of 10% of the purchase price. How much is her down
payment?
$13,000
$23,000
$30,000
$2,000

Answers

THE ANSWER IS: 23,000

NO LINKS!! URGENT HELP PLEASE!!

6. Anisha invested $8000 in an account that earns 10% interest. How much money will she have in 15% in the interest is compounded quarterly?


7. Kevin borrowed $32,500 to purchase a new car. If the rate on the loan is 6% compounded annually, how much will he pay in total oer the course of the 5 year loan?

Answers

Answer:

6)  $35,198.32

7)  $43,492.33

Step-by-step explanation:

To solve both these problems, we can use the formula for compound interest:

[tex]\boxed{\begin{minipage}{8.5 cm}\underline{Compound Interest Formula}\\\\$ A=P\left(1+\frac{r}{n}\right)^{nt}$\\\\where:\\\\ \phantom{ww}$\bullet$ $A =$ final amount \\ \phantom{ww}$\bullet$ $P =$ principal amount \\ \phantom{ww}$\bullet$ $r =$ interest rate (in decimal form) \\ \phantom{ww}$\bullet$ $n =$ number of times interest is applied per year \\ \phantom{ww}$\bullet$ $t =$ time (in years) \\ \end{minipage}}[/tex]

Question 6

Given values:

P = $8,000r = 10% = 0.1n = 4 (quarterly)t = 15 years

Substitute the given values into the formula and solve for A:

[tex]A=8000\left(1+\dfrac{0.1}{4}\right)^{4\cdot 15}[/tex]

[tex]A=8000\left(1+0.025\right)^{60}[/tex]

[tex]A=8000\left(1.025\right)^{60}[/tex]

[tex]A=35198.3179905[/tex]

[tex]A=35198.32[/tex]

Therefore, the balance of Anisha's account after 15 years will be $35,198.32.

[tex]\hrulefill[/tex]

Question 7

Given values:

P = $32,500r = 6% = 0.06n = 1 (annually)t = 5 years

Substitute the given values into the formula and solve for A:

[tex]A=32500\left(1+\dfrac{0.06}{1}\right)^{1\cdot 5}[/tex]

[tex]A=32500\left(1+0.06\right)^{5}[/tex]

[tex]A=32500\left(1.06\right)^{5}[/tex]

[tex]A=43492.331272[/tex]

[tex]A=43492.33[/tex]

Therefore, Kevin will pay a total of $43,492.33 over the course of the 5 year loan (assuming he doesn't pay any of the loan back over those 5 years).

Will Give Brainliest Please Help!

Answers

Since the transversals are parallel, angle 10 and 1 are supplementary (add up to 180)
this means that if angle 10 is 113 degrees, then angle 1 is 180-113 degrees which is 67 degrees

While digging in his garden. Tyri pushes a shovel into the ground with a force of 630 newtons at an angle of 70° with the ground. Which diagram shows the resolution of the force Tyri exerts into its rectangular components?​

Answers

The resolution of the given force applied to the shovel is: A vertical force of 592 NA horizontal force of 215.47 N

How to find the components of the force?

The components of a force represent the combined vertical and horizontal forces that combine to make the resultant force. Components are two vectors that add up to the given vector which are perpendicular to each other.

Now, when we apply a force F to an object at an angle θ, it can be said that the resolution of the forces is:

In the horizontal direction: F_x = F * cos θIn the vertical direction: F_y = F * sin θTyri pushes a shovel into the ground with a force of 630 newtons at an angle of 70° with the ground.

Thus, the diagram that shows the resolution of the forces is:

A vertical line showing a force of 630 * sin 70 = 592 N

A horizontal line showing a force of 630 * cos 70 = 215.47 N

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Kendall kept track of the number of hours that she spent in
pep band each week for several weeks. She spent 2, 4, 4, 5,
and 5 hours.
What is the mean number of hours that Kendall spent in pep band each
week?
OA. 5 hours
OB. 4 hours
OC. 20 hours
OD. 3 hours

Answers

Option B is correct. How?
Solution: Given Kyndall spent 2,4,4,5 and 5 hours. Mean 2= 2+4+4+5+5/5 = 20/5 = 4 hours.

Therefore, the mean number of hours she spent is 4 hours.

The volume of a gas was measured as the temperature was increased from 173 K to
423 K in 50 K intervals. The gas volumes recorded, starting at 173 K, were 16, 21, 26, 30, 36, and 40 cm . Determine whether the data is best described by an increasing or decreasing function, and whether it is linear or exponential. Find a regression equation.

Answers

The data is best described by an increasing function. The regression equation is y =0.0965x - 0.61.

Here is a table of the data:

Temperature (K) Gas Volume (cm³)

173     16

223     21

273     26

323     30

373     36

423     40

The data is best described by an increasing function, and it is likely to be linear since the volume of the gas increases uniformly with the temperature.

Let x be the temperature and y be the volume of the gas.

The slope is given by (nΣxy - ΣxΣy) / (nΣx² - (Σx)²),

where n is the number of data points, Σxy is the sum of the products of x and y, Σx is the sum of x, Σy is the sum of y, and Σx² is the sum of the squares of x.

The y-intercept is given by (Σy - bΣx) / n, where b is the slope.

Using the data, we have n = 6, Σx = 17788, Σy = 169, Σxy = 4225, and Σx² = 43750.

Substituting these values into the formulas gives the slope b = 0.09657 and the y-intercept a = -0.61.

Therefore, the regression equation is y =0.0965x - 0.61.

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Michael records the number of miles he runs each week for nine weeks
6,11,13,8,15,9,11,5,9

Which box plot represents the data

Answers

The box plot contains a median of 9, Q1 as 7, and Q3 as 12.

The Smallest: value is 5 and the largest value is 15.

Option B is the correct answer.

We have,

To find the median, we need to arrange the numbers in order:

5, 6, 8, 9, 9, 11, 11, 13, 15

The median is the middle number, which is 9.

To find the quartiles, we first need to find the median of the lower half and upper half of the data.

Lower half: 5, 6, 8, 9, 9

Upper half: 11, 11, 13, 15

To find Q1, we find the median of the lower half:

(6 + 8)/2 = 7

To find Q3, we find the median of the upper half:

(11 + 13)/2 = 12

The smallest number is 5 and the largest number is 15.

Therefore,

Median: 9

Q1: 7

Q3: 12

Smallest: 5

Largest: 15

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Please help me with this 12-14

Answers

The arc lengths and the angle measures are arc length = 0.67 meters, AC = 45 degrees and TV = 23 degrees

Calculating the arc lengths and the angles

Arc length

Given that

Central angle = 6 degrees

Circumference = 40 meters

The arc length is calculated as

arc length = Central angle/360 * Circumference

So, we have

arc length = 6/360 * 40

Evaluate

arc length = 0.67 meters

The measurement of AC

Here, the arc AC subtends the angle 45 degrees at the center of the circle

This means that

AC = 45 degrees

The measurement of TV

Here, the arc TV subtends the angle 23 degrees at the center of the circle

This means that

TV = 23 degrees


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answer it for brainlest and whatever just i need help quikely

Answers

Answer:

so do i get brainiliest???

Step-by-step explanation:

Graph the line with equation y=-x-2

Answers

The line with the equation y = -x - 2 will pass through the points (0, -2) and (2, -4) and continue infinitely in both directions.

We have,

To graph the line with the equation y = -x - 2, we can follow these steps:

- Step 1:

Plot two points on the graph.

Select any x-value and substitute it into the equation to find the corresponding y-value.

Repeat this process for a different x-value to find another y-value.

Let's choose x = 0:

y = -(0) - 2

y = -2

So we have the point (0, -2).

Let's choose x = 2:

y = -(2) - 2

y = -4

So we have the point (2, -4).

- Step 2:

Plot the points on a coordinate plane.

Plot the points (0, -2) and (2, -4) on a graph.

Step 3: Draw a line passing through the two plotted points.

Using a straightedge or by hand, draw a line that connects the two points.

Thus,

The line with the equation y = -x - 2 will pass through the points (0, -2) and (2, -4) and continue infinitely in both directions.

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Please help I am struggling a lot thank you so much have a great day

Answers

Answer:

Step-by-step explanation:

To calculate the values of the given function, substitute the given values of x into the function f(x) = 7x^2 - 8x + 8:

f(-2) = 7(-2)^2 - 8(-2) + 8

= 7(4) + 16 + 8

= 28 + 16 + 8

= 52

f(-1) = 7(-1)^2 - 8(-1) + 8

= 7(1) + 8 + 8

= 7 + 8 + 8

= 23

f(0) = 7(0)^2 - 8(0) + 8

= 0 - 0 + 8

= 8

f(1) = 7(1)^2 - 8(1) + 8

= 7(1) - 8 + 8

= 7 - 8 + 8

= 7

f(2) = 7(2)^2 - 8(2) + 8

= 7(4) - 16 + 8

= 28 - 16 + 8

= 20

Therefore, the values of the function for the given inputs are:

f(-2) = 52

f(-1) = 23

f(0) = 8

f(1) = 7

f(2) = 20

A. Determine if (x+2) is a factor of f(x) =x^3-3x^2-7x+6. Explain your reasoning.
Yes (x+2) is a factor of the function, because the remainder is zero.

No (x+2) is NOT a factor of the function, because the remainder is NOT zero.


B. Use division (long or synthetic) and/or factoring to write f(x) =x^3-3x^2-7x+6 in completely factored form, given that (x+2) is a factor of f(x).

select an answer
f(x)=
DNE
X=
Y=

C. Find all the zeros F(X)= x^3-3x^2-7x+6 . NO DECIMALS!

select an answer
y=
x=
DNE
F(X)=

Answers

A. Since the remainder is zero, (x+2) is indeed a factor of f(x).

B. So, f(x) is completely factored as (x+2)(x-1)(x-3).

C. The zeros of F(x) are: -2, 1, and 3.

To determine if (x+2) is a factor of f(x) = x³-3x²-7x+6 can use synthetic division or long division.

Using synthetic division:

-2 | 1  -3  -7  6

   -2   10  -6

    1  -5   3  0

Using the result from part A we can write:

f(x) = (x+2)(x²-5x+3)

The quadratic factor can be factored further using the quadratic formula or factoring by grouping:

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

So, f(x) is completely factored as (x+2)(x-1)(x-3).

The zeros of f(x) are the values of x that make f(x) equal to zero.

From the factored form of f(x) we can see that the zeros are -2, 1 and 3. So:

The zeros of F(x) are: -2, 1, and 3.

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a metallurgist has one alloy containing 40% aluminum and another containing 61% aluminum. How many pounds of each alloy must he use to make 57 pounds of a third alloy containing 46% aluminum? (round to two decimal places if necessary.)

Answers

The number of pounds of 40% alloy and 61% alloy required to make the third alloy containing 46% aluminum is 16.29 pounds and 40.71 pounds respectively.

The number of pounds of alloy that must be used.

Let

x = pounds of 40% alloyy = pounds of 61% alloy

[tex]\sf x + y = 57[/tex]

[tex]\sf 40x + 61y = 46\times57[/tex]

[tex]\sf x + y = 57[/tex]

[tex]\sf 40x + 61y = 2622[/tex]

Solve simultaneously

From (1)

[tex]\sf x = 57 - y[/tex]

Substitute into (2)

[tex]\sf 40x + 61y = 2622[/tex]

[tex]\sf 40(57-y) + 61y = 2622[/tex]

[tex]\sf 2280 -40y+61y = 2622[/tex]

[tex]\sf -40y+61y = 2622-2280[/tex]

[tex]\sf 21y = 342[/tex]

divide both sides by 21

[tex]\sf y = \dfrac{342}{21}[/tex]

[tex]\sf y = 16.29 \ pounds[/tex]

Substitute y = 16.29 pounds into (1)

[tex]\sf x + y = 57[/tex]

[tex]\sf x + 16.29 = 57[/tex]

[tex]\sf x = 57 - 16.29[/tex]

[tex]\sf x = 40.71 \ pounds[/tex]

So therefore, the number of pounds of 40% alloy and 61% alloy is 16.29 pounds and 40.71 pounds respectively.

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A rectangle measures 2 3/4 inches by 2 3/4 inches. What is its area?

Answers

The area of the given rectangle is 121/16 square inches.

As know that the area of a rectangle is defined as the product of the length and width.

The area of a rectangle = L × W

Where W is the width of the rectangle and L is the length of the rectangle

To find the area of the rectangle, we need to multiply the length by the width. We have:

Length = 2 3/4 inches = 11/4 inches

Width = 2 3/4 inches = 11/4 inches

Area = Length x Width

Area = (11/4) inches x (11/4) inches

Area = 121/16 square inches

Therefore, the area of the rectangle is 121/16 square inches.

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