Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 3 - Solving Inequalities - 3-5 Working With Sets - Practice and Problem-Solving Exercises - Page 197: 16

Answer

{d | d≤−7}

Work Step by Step

Solve the inequality. 7−3d≥28⟶ subtract 7 from each side 7−3d−7≥28−7⟶ subtract −3d≥21⟶ divide each side by -3; flip the inequality −3d÷−3≤21÷−3⟶ divide d≤−7 The solution is written in the criteria area of the set-builder notation.
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