Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - Chapter Review - Page 154: 34


40 cm

Work Step by Step

Recall, the equation for the area of a rectangle is: $Area= length \times width$. We are told that the length is 5.5cm and that the area is 220 square cm, so we plug these numbers in to obtain: $220=5.5\times w$. We cancel out the multiplication by dividing both sides by 5.5 to obtain that w=40 cm.
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