Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 9 - Basic Algebra - 9.3 Multiplying and Dividing Signed Numbers - 9.3 Exercises: 87

Answer

=$-\frac{7}{40}$

Work Step by Step

$(-\frac{1}{2})(\frac{2}{5})(\frac{7}{8})\longrightarrow$ Solve left to right. To multiply fractions, multiply numerator by numerator and denominator by denominator. The first product is negative because the two factors have opposite signs. =$(-\frac{2}{10})(\frac{7}{8})\longrightarrow$ Multiply, The product is negative because the two factors have opposite signs. =$-\frac{14}{80}\longrightarrow$ Reduce using the greatest common factor, 2. =$-\frac{14\div2}{80\div2}\longrightarrow$ Simplify. =$-\frac{7}{40}$
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