SOLUTION: The outside dimensions of a picture frame are 29cm and 30cm. The area of the picture inside the frame is 420 square centimeters. Find the width of the frame.
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Question 441897: The outside dimensions of a picture frame are 29cm and 30cm. The area of the picture inside the frame is 420 square centimeters. Find the width of the frame.
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
(30-2x)(29-2x)=420
870-118x+4x2=420
4x2-118x+450=0
(2x-50)(2x-9)=0
x=25 or 9/2
Throwing out the 25, we get the width of the frame to be 4-1/2cms..
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