SOLUTION: A rectangular driveway has an area of 240 square feet. Its perimeter is 64 feet. What are the dimensions of the driveway?

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Question 1099297: A rectangular driveway has an area of 240 square feet. Its perimeter is 64 feet. What are the dimensions of the driveway?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Can you solve this system for dimensions x and y of the rectangle:

system%28xy=240%2Cx%2By=32%29

?


y=32-x
-
x%2832-x%29=240
-x%5E2%2B32x-240=0
x%5E2-32x%2B240=0
%28x-12%29%28x-20%29=0


Dimensions are 12 feet and 20 feet.


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You might also look again at the system of equations, and ask yourself, what two numbers give product of 240 and when summed give 32 (half of the perimeter).