Answer
40-x
A(x)=-x$^2$+40x+0
Work Step by Step
The perimeter of a rectangle is 80 feet. If the length of the rectangle is represented by x, its width can be expressed as (40-x).
A(x)=x(40-x)
A(x)=40x-x$^2$
A(x)=-x$^2$+40x+0
College Algebra (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-32178-228-3
ISBN 13:
978-0-32178-228-1
Chapter 3 - Polynomial and Rational Functions - Concept and Vocabulary Check - Page 343: 7
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