Answer
$-\frac{3}{10}$
Work Step by Step
$-\frac{7}{10} + \frac{2}{5} = \frac{-7 + 4}{10} = -\frac{3}{10}$
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 9 - Basic Algebra - 9.2 Adding and Subtracting Signed Numbers - 9.2 Exercises - Page 639: 29
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