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jmc

prealgebra senior

Problem

The area of a rectangle is 432 square centimeters. What would the new area be if the length of the rectangle was decreased by and the width of the rectangle was increased by ? Express your answer to the nearest whole number.
Solution
If the length of the rectangle is decreased by , it will be of what it was. If the width is increased by , it will be of what it was. The area will be of what it was. Thus, of 432 is or about .
Final answer
428\text{ square centimeters}