Algebra 1: Common Core (15th Edition)

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

Chapter 2 - Solving Equations - 2-9 Percents - Practice and Problem-Solving Exercises - Page 143: 57

Answer

14.4 cm wide.

Work Step by Step

The postcard is being reproduced, so we know that the two shapes are similar shapes. This means that all of the sides are proportional. We will call x the side that we want to find. Thus, we set up the equation: x/36=9/22.5. We multiply both sides of the equation by 36 to obtain that x=14.4 cm.
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