SOLUTION: 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 polynomia
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Question 401147: 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 solver91311(24713) (Show Source): You can put this solution on YOUR website!
The perimeter of a rectangle is given by:
Substitute the two binomial expressions for length and width:
\ =\ 2(3x\ +\ 9)\ +\ 2(2x\ -\ 5))
Simplify so that you keep a tidy kitchen:
\ =\ 10x\ +\ 8)
For the second part of your problem, plug in a 4 and do the arithmetic.
\ =\ 10(4)\ +\ 8)
Remembering to express your answer in the specified units, namely feet in this case.
John
My calculator said it, I believe it, that settles it
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