Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 1 - Section 1.2 - Fractions in Algebra - Exercise Set - Page 30: 125

Answer

a) 140 b) 160

Work Step by Step

a) Plug 20 as a into H = $\frac{7}{10}$(220 - a) H = $\frac{7}{10}$(220 - 20) H = $\frac{7}{10}$(200) H = 7(20) = 140 b) Plug 20 as a into H = $\frac{4}{5}$(220 - a) H = $\frac{4}{5}$(220 -20) H = $\frac{4}{5}$(200) H = 4(40) = 160
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