SOLUTION: Could someone please help me? I do not understand this word problem. The width of a rectangular playground is 2x-5feet and the length is 3x+9 feet. Write a polynomial P(x) that r

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Could someone please help me? I do not understand this word problem. The width of a rectangular playground is 2x-5feet and the length is 3x+9 feet. Write a polynomial P(x) that r      Log On


   

Question 87041: Could someone please help me? I do not understand this word problem.
The width of a rectangular playground is 2x-5feet and the length is 3x+9 feet. Write a polynomial P(x) that represents the perimeter and then evaluate this perimeter polynomial if x is 4 feet. Thank you!!!
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
The width of a rectangular playground is 2x-5feet and the length is 3x+9 feet. Write a polynomial P(x) that represents the perimeter and then evaluate this perimeter polynomial if x is 4 feet.
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Perimeter = 2*length + 2*width
Perimeter = 2(length + width)
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Your problem:
perimeter = 2(3x+9+2x-5) = 2(5x+4) = 10x+8
If x = 4 then perimeter = 10*4+8 = 48 feet.
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Cheers,
Stan H.