Answer
12
Work Step by Step
Cross multiply.
$\frac{20}{z}$ = $\frac{5}{3}$
20 x 3 = 5 x z
60=5z
Divide both sides by 5.
12 = z
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 7 - Similarity - 7-1 Ratios and Proportions - Lesson Check - Page 436: 3
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