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3 years ago

13

Find the area of a trapezoid with sides of 8cm 14cm 8cm 21cm and a height of 7cm

1 answer:

Vilka [71]3 years ago

8 0

Answer:

The answer to the question is 122.5

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PLESE HELP ME.........

sergiy2304 [10]

1296 is your answer.

3 0

3 years ago

if 60 people were asked their favorite color how many people preferred blue when 26% were red ,16%green,30%blue,4%black and 24%y

Agata [3.3K]

An easy trick is to just take 10% first by moving the decimal place to the left one, like this. 10% of 60.0 is 6.0. Then multiply that by 3 to get 30% so 6*3= 18 people.

3 0

4 years ago

Alex is building a rectangle fence around his yard. the total perimeter of the fence is 68 feet and the area of his yard is 240

Alisiya [41]

Let's call the length of the rectangular fence $l$ and the width of the rectangular fence $w$ .

Based on the information in the problem, we can make two equations, based on the formulas for perimeter and area:

$A = lw$

$P = 2l + 2w$

Now, let's substitute in the values we are given in the problem:

$240 = lw$

$68 = 2l + 2w$

Now, let's solve the system using substitution.

$240 = lw \Rightarrow \dfrac{240}{w} = l$

Solve for $l$ from the first equation

$68 = 2\Bigg( \dfrac{240}{w} \Bigg) + 2w$

Substitute this value into the second equation

$68 = \dfrac{480}{w} + 2w$

Simplify

$68w = 480 + 2w^2$

Multiply both sides of the equation by $w$

$2w^2 - 68w + 480 = 0$

Subtract $68w$ from both sides of the equation

$(2w - 48)(w - 10) = 0$

Factor

$2w - 48 = 0$ and $w - 10 = 0$

Use the Zero Product Property and solve both factors

$2w - 48 = 0 \Rightarrow 2w = 48 \Rightarrow w = 24$

$w - 10 = 0 \Rightarrow w = 10$

We are given two possible lengths. However, the funny thing is that both produce the same dimensions: 24 ft by 10 ft:

$w = 24 \Rightarrow 240 = l(24) \Rightarrow l = 10$

$w = 10 \Rightarrow 240 = l(10) \Rightarrow l = 24$

Thus, our answer is Choice C, or 10 feet by 24 feet.

4 0

3 years ago

The length of a rectangle is five times its width. if the perimeter of the rectangle is 96 m , find its length and width.

givi [52]

<span>The length of a rectangle is five times its width, and if the perimeter of the rectangle is 96 m then the length would be 19 m.</span>

8 0

4 years ago

Help me again please?

Andrej [43]

• 47.51 seconds * 8 times = 380.08 seconds total

4 0

3 years ago