SOLUTION: The length of a rectangle is 8 inches greater than it' width. Find the width of a rectangle if it's area is 105 square feet.
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Question 750883: The length of a rectangle is 8 inches greater than it' width. Find the width of a rectangle if it's area is 105 square feet.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
A = LW
105 = (x+8)(x)
105 = x^2 + 8x
x^2 + 8x = 105
x^2 + 8x - 105 = 0
(x + 15)(x - 7) = 0
x + 15 = 0 or x - 7 = 0
x = -15 or x = 7
Toss out x = -15
So the only solution that makes sense is x = 7
Width: 7
Length: 15
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