Answer
The missing length is 13.5 units
Work Step by Step
$\frac{18}{z}$=$\frac{40}{30}$ set cross products equal
40z=18$\times$30
40z=540
$\frac{40z}{40}$=$\frac{540}{40}$ Divide both sides by 40
z=13.5
The missing length is 13.5 units
Prealgebra (7th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321955048
ISBN 13:
978-0-32195-504-3
Chapter 6 - Section 6.5 - Congruent and Similar Triangles - Exercise Set - Page 452: 19
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