SOLUTION: The width of a rectangular Piayground is 2x-5 feet, and the length is 3x+9 feet. Write a polynomial P(x) that the perimeter and then evaluate this perimeter polynomial if x is 4 fe

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: The width of a rectangular Piayground is 2x-5 feet, and the length is 3x+9 feet. Write a polynomial P(x) that the perimeter and then evaluate this perimeter polynomial if x is 4 fe      Log On


   

Question 118516: The width of a rectangular Piayground is 2x-5 feet, and the length is 3x+9 feet. Write a polynomial P(x) that the perimeter and then evaluate this perimeter polynomial if x is 4 feet.
Answer by tutor_paul(519) About Me  (Show Source):
You can put this solution on YOUR website!
The perimeter of a rectangle (P) = 2W+2L.
you are given the length (L) and the width (W).
So:
P=2%282x-5%29%2B2%283x%2B9%29
P=4x-10%2B6x%2B18
highlight%28P=10x%2B8%29
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Just plug 4 into x in the above equation to get a value for the perimeter when x=4. i will leave that part to you :-)
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Good Luck,
tutor_paul@yahoo.com