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The width of a rectangle is 5x-2.5 feet and the length is 2.5x+8. what is the perimeter of the rectangle

Respuesta :

Americ
l= 2.5x + 8
w= 5x - 2.5

Perimeter= 2l + 2w
substitute values above for l and w

P= 2(5x - 2.5) + 2(2.5x + 8)
multiply outer #s by all in parentheses

P=(2*5x) + (2*-2.5) + (2*2.5x) + (2*8)
P=10x - 5 + 5x + 16

combine like terms
P=15x + 11

ANSWER: P= 15x + 11

Hope this helps! :)

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