SOLUTION: a perimeter of a rectangle is 24 feet. if the width of the rectangle is X ft. how many square feet is the area of the rectangle?

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Question 843756: a perimeter of a rectangle is 24 feet. if the width of the rectangle is X ft. how many square feet is the area of the rectangle?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The perimeter of a rectangle is
P=2%2A%28L%2BW%29=24
L%2BW=12
L%2Bx=12
L=12-x
W=x
The area of a rectangle is,
A=L%2AW=%2812-x%29x=12x-x%5E2