If the perimeter of a rectangle is 38 inches how tall is it

1 answer:

7 0

P = 2l + 2w
38 = 2l + 2w 
l = w + 3 , (the length is 3 inches more than the width) 

then substitute w + 3 to l in 38 = 2l + 2w 

38 = 2(w + 3) + 2w 

38 = 2w + 6 + 2w 

38 = 4w + 6, then take away 6 from both sides 

32 = 4w, then divide both sides by 4 

w = 8 inches (width)

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