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The length of a rectangle is 8 less than twice the width. the perimeter is 38 feet. Find the length and width.

 Mar 25, 2020
 #1
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Perimeter =  2 (W + L)

 

And L  = 2W - 8

 

So

 

38 = 2 ( W  + 2W - 8)     simplify

 

Divide both sides by 2

 

19 = (3W  - 8)     add 8 to both sides

 

27 = 3W     divie both sides by 3

 

9 = W

 

And

 

L = 2(9)  - 8 =  18 - 8   =   10

 

 

cool cool cool

 Mar 25, 2020

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