Answer
$-5\leq d\leq5$
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
$-5\leq d\leq5$
Algebra 1
by Hall, Prentice
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
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