SOLUTION: Find the dimensions of a rectangle whose perimeter is 36 inches and whose length is three times its width

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Question 804030: Find the dimensions of a rectangle whose perimeter is 36 inches and whose length is three times its width
Answer by erica65404(394) About Me  (Show Source):
You can put this solution on YOUR website!
P=L%2BL%2BW%2BW
36=2L%2B2W The perimeter is 36 inches.
L=3W The length is 3 times the width.
now place L=3W into 36=2L%2B2W.
36=2%283W%29%2B2W
36=8W
W=4.5
Now plug 4.5 into 36=2L%2B2W.
36=2L%2B2%284.5%29
36=2L%2B9
27=2L
L=13.5