Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 6 - Section 6.5 - Congruent and Similar Triangles - Exercise Set: 35


52 tetras

Work Step by Step

Write a proportion. Size is to size as count is to count. $\frac{20}{55}=\frac{19}{x}$ $\longrightarrow$cross multiply to solve for x $20x=55\times19$ $\longrightarrow$multiply $20x=1045$ $\longrightarrow$multiplication property of equality $20x\div20=1045\div20$ $\longrightarrow$divide $x=52.25$ Pete would not put a part of a tetra in the tank so the answer is 52.
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