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 - Page 181: 21

Answer

$6\lt c$

Work Step by Step

$-30\gt-5c\longrightarrow$ divide both sides by -5; reverse the inequality sign $-30\div-5\lt-5c\div-5\longrightarrow$ divide $6\lt c$ Check the inequality. $-30\overset?\gt-5(7)$ $-30\gt-35\checkmark$ Since 6 is not included in the solution, the endpoint of the graph is an open circle.
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