SOLUTION: The length of a rectangle is 4 less than twice the width. The area of the rectangle is 70 square feet. Find the dimensions of the rectangle.

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Question 1042035: The length of a rectangle is 4 less than twice the width. The area of the rectangle is 70 square feet. Find the dimensions of the rectangle.

Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
If w is the width, then the length is 2w-4. So:
w(2w-4)=70
2w²-4w-70=0
w²-2w-35=0
(w+5)(w-7)=0
w=-5, 7
If the width is 7, then the length is 10.
7 x 10=70. ☺☺☺☺