Elementary Algebra

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

Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.4 - Integers: Multiplication and Division - Problem Set 1.4 - Page 26: 41



Work Step by Step

Because multiplication is before addition in order of operations, we first multiply and then we add. We see that we are multiplying a positive number by a negative number in this problem. Recall, when we multiply a positive by a negative, the answer will always be a negative. Thus, we obtain: $3 \times -4 + 5 \times (-7) = -12+(-35)=-47$
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