meetugarg54 meetugarg54

31-01-2017
Mathematics

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My basement has an area of 5,120 square feet. The width of the basement is 4/5 its length. What is the length of basement

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texaschic101 texaschic101

31-01-2017

A = L * W
W = 4/5L

5120 = L(4/5L)
5120 = 4/5L^2
5120 * 5/4 = L^2
6400 = L^2....take the square root of both sides, eliminating the ^2
sqrt 6400 = L
80 = L.......length is 80 ft <===

W = 4/5L
W = 4/5(80)
W = 64...width is 64 ft

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