15-01-2020
Mathematics

contestada

The length of a rectangle is one inch less than three times it's width. If the perimeter of the rectangle is 54 inches, find the length.

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Respuesta :

15-01-2020

Answer:

l = 20

Step-by-step explanation:

set up a system of equations

l = 3w -1

54 = 2l + 2w

substitute

54 = 2(3w-1) + 2w

56 = 8w

w = 7

l = 3 *7 -1

l = 20

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