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13-01-2020
Mathematics

contestada

The length of a rectangle is double it’s width. If the perimeter is 54cm,what is it’s length?

Respuesta :

15-01-2020

Answer:

length is 18

Step-by-step explanation:

set up a system of equations

use substitution

54 = 2l + 2w

l = 2w

54 = 2 (2w) + 2w

54 = 6w

w = 9

l = 2 * 9 = 18

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