SOLUTION: A picture is four inches longer than it is wide and the total area is 77 square inches. What are the dimensions of the picture?

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Question 728595: A picture is four inches longer than it is wide and the total area is 77 square inches. What are the dimensions of the picture?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
AREA=-LW
L=W+4
77=(W+4)W
77=W^2+4W
W^2+4W-77=0
(W+11)(W-7)=0
W-4=0
W=7 ANS. FOR THE WIDTH.
PROOF:
77=(7+4)7
77=11*7
77=77