8 November, 22:44
The length of a rectangular suitcase is 7 inches longer than the width. the area of the suitcase is 144 squared inches.
8 November, 23:56
A = LW
A = 144
L = W + 7
144 = W (W + 7)
144 = W^2 + 7W
W^2 + 7W - 144 = 0
(W - 9) (W + 16) = 0
W - 9 = 0
W = 9
W + 16 = 0
W = - 16 ... this is an extraneous solution and will not work
So W = 9
L = W + 7
L = 9 + 7
L = 16
so ur dimensions are : Length = 16 in. and Width = 9 in ... and area = (9 * 16) = 144 in^2
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» The length of a rectangular suitcase is 7 inches longer than the width. the area of the suitcase is 144 squared inches.