SOLUTION: the perimeter of a rectangle is 18 feet and the area of the rectanggle is 20 feet what is the width of the rectangle?

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Question 470268: the perimeter of a rectangle is 18 feet and the area of the rectanggle is 20 feet what is the width of the rectangle?
Answer by Gogonati(855) About Me  (Show Source):
You can put this solution on YOUR website!
Half of the perimeter is 9 feet and its equal L+W=9. Let the W=x, then L=9-x, and the area is equal A=LxW, substituting we get:
20=x%289-x%29 write this equation in standard form x%5E2-9x%2B20=0, and solve
it by factoring %28x-5%29%28x-4%29=0. Set to zero each factor to find the roots:
x-5=0 <=> x=5, and x-4=0 <=> x=4.
Answer:The width of the rectangle is 4 feet and its length 5 feet.