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bianca
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math
A rectangle has a length of 15 feet less than 6 times its width. If the area of the rectangle is 561 square feet, find the length of the rectangle.
Captain Smart
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Re: math
w = width
6w  15 = length
w(6w  15) = 561 area is length x width
6w²  15w = 561 distributed
6w²  15w  561 = 0 subtracted 561
w = 11 or 8.5 quadratic formula
width = 11
length = 51
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