Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 3 - Solving Inequalities - 3-8 Unions and Intersections of Sets - Mixed Review - Page 220: 53


$-5\leq d\leq5$

Work Step by Step

$|4d|\leq20\longrightarrow$ write as a compound inequality $-20\leq4d\leq20\longrightarrow$ divide all parts by 4 $-20\div4\leq4d\div4\leq20\div4\longrightarrow$ divide $-5\leq d\leq5$
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