The area A, in square meters, of a rectangle with a perimeter of 80 meters is given by the equation  A = 40w − w2,  where w is the width of the rectangle in meters. What is the width of a rectangle if its area is 300 m2?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter3: Multi-step Equations And Inequalities
Section3.2: Solving Equations Having Like Terms And Parentheses
Problem 56E
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The area A, in square meters, of a rectangle with a perimeter of 80 meters is given by the equation 
A = 40w − w2,
 where w is the width of the rectangle in meters. What is the width of a rectangle if its area is 300 m2?
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