Elementary Algebra

by Kaufmann, Jerome; Schwitters, Karen;

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 27: 91

Answer

$-7$

Work Step by Step

$5+4(-3) = -7$ The initial temperature is 5 degrees, so we write five. Since the temperature drops by 3 degrees each hour, we add -3, and since four hours pass, we multiply -3 by 4.

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