31-10-2017
Mathematics

contestada

A rectangular porch has an area of 75 square feet.The length of the porch is 4 feet longer than the width.What is the width of the porch ?

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wolf1728 wolf1728

31-10-2017

x * (x +4) = 75
x^2 + 4x -75 = 0
x = [-4 +sq root (316)] / 2
x = 13.7763888346 / 2
x = 6.8881944173
x = 6.888 (rounded)
Width = 6.888
Length = Width +4
Width = 10.888

Double Check
6.888 * 10.888 = 75 square feet

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