SOLUTION: Perimeter of a rectangle.The width of a rectangular playground is 2x -5 feet, and the length is 3x + 9 feet. Write a polynomial P(x) that represents the perimeter and then evaluate

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Question 319197: Perimeter of a rectangle.The width of a rectangular playground is 2x -5 feet, 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.
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Perimeter: P=2L%2B2W=2%283x%2B9%29%2B2%282x-5%29=6x%2B18%2B4x-10=10x%2B8


So the perimeter is P=10x%2B8. Now just plug in x=4 and evaluate.