Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 7 - Algebraic Fractions - Chapter 7 Test: 24

Answer

14 mph

Work Step by Step

Since Wendy goes 42 miles in the same time, she is going 42/36 x = 1.167x, where x is Betty's rate. Since Wendy is going 2 mph faster, we obtain: $ 1.167x = x + 2 \\ .167x = 2 \\ x = 12$ Since Betty is going 12 mph, Wendy must be going: 12 + 2 = 14 mph.
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