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3 years ago

My rectangular soccer field site has a length equal to twice its width. Find its area in terms of its length x

1 answer:

8 0

The area of a rectangle = (length)(width)

let's call the width x. the length is twice the width, so the length = 2x.

so the area = (x)(2x)
area = 2x^2

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Calculate the surface area and show work :) please help me no links!!

eimsori [14]

Answer:

294 in.²

Step-by-step explanation:

I believe this figure is a rectangular prism.

------------------------------------------------------------------------------------

<u>Explain:</u>

To find the surface area of a rectangular prism, use this formula:

$SA=2lw+2lh+2wh$

$SA=2(lw+lh+wh)$

$l-length$

$w-width$

$h-height$

A phrase I use to help remember this formula is:

LISA WILSON LOST HER WITCH HAT TWICE (2)

------------------------------------------------------------------------------------

<u>Solve:</u>

The length of this rectangular prism is 9 in.

This width is 10 in.

The height is 3 in.

Now, I will plug the numbers into the first formula.

$SA=(2*9*10)+(2*9*3)+(2*10*3)=294 in.^2$

------------------------------------------------------------------------------------

<u>Conclude:</u>

I, therefore, believe the area of this rectangular prism is 294 in.²

5 0

3 years ago

Henry is a very active teen who weighs 140 pounds. What are his Dailey energy needs in calories?

uysha [10]

A healthy 140 pound boy needs between 2,000 to 2,400 calories a day.
Hope that helps :)

4 0

3 years ago

Read 2 more answers

Which ordered pair is a solution of the equation? y=8x+3 1/11 or -1/-5 or both

suter [353]

<h3>✽ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ✽</h3>

➷ Substitute the values in:

1st option:

y = 8(1) + 3

y = 11

2nd option:

y = 8(-1) + 3

y = -5

The correct answer would be both.

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

3 0

4 years ago

Read 2 more answers

Luke measured caterpillars for a science project. He believes that caterpillar A is longer than caterpillar B because it has mor

Verizon [17]

Answer: disagree

Step-by-step explanation:

Caterpillar A is longer, but not because of the decimal places. It is longer because of the place value.

3 0

3 years ago

Read 2 more answers

Solve 2x^2 − 8x = −7

kenny6666 [7]

Answer:

The answer to your question is below

Step-by-step explanation:

2x² - 8x = - 7

Divide by 2

$\frac{2}{2} x^{2} - \frac{8}{2} x = \frac{-7}{2}$

Complete the trinomial

$x^{2} - 4x + (2)^{2} = \frac{-7}{2} + (2)^{2}$

Simplify

$x^{2} - 4x + (2)^{2} = \frac{- 7 + 4}{2}$

$x^{2} - 4x + 4 = \frac{-3}{2}$

Factor

(x - 2)² = $\frac{-3}{2}$

Get the square root

$\sqrt{(x - 2)^{2}} = \sqrt{\frac{-3}{2}}$

Simplification

x - 2 =± $\sqrt{\frac{3}{2}} i$

x₁ = 2 + $\sqrt{\frac{3}{2}} i$

x₂ = 2 - $\sqrt{\frac{3}{2}}$

6 0

3 years ago