the area of a rectangle is 21 ft2 , and the length of the rectangle is 1 ft less than twice the width. Find the dimensions of the rectangle.
Suppose the width of the rectangle is w, then its length is 2w - 1. [ its area = w(2w - 1) = 21, solve the equation we get w = -3 or 7/2, since its a rectange the side can not be negative so its width is 7/2 feets, and the length is 2(7/2) - 1 = 6 feets. ]
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Updated 3/21/2014 4:08:17 PM
Confirmed by andrewpallarca [3/21/2014 4:08:17 PM]
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