Algebra 1

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

Chapter 3 - Solving Inequalities - 3-3 Solving Inequalities Using Multiplication or Division - Practice and Problem-Solving Exercises: 22

Answer

$w\geq-5$
1501815180

Work Step by Step

$-4w\leq20\longrightarrow$ divide both sides by -4; reverse the inequality sign $-4w\div-4\geq20\div-4\longrightarrow$ divide $w\geq -5$ Check the endpoint. $-4(-5)\overset?=20$ $20=20\checkmark$ Check the inequality. $-4(1)\overset?\leq20$ $-4\leq20\checkmark$ Since -5 is included in the solution, the endpoint of the graph is a solid circle.
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