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 199: 66

Answer

Draw an open circle on 12 and draw the line to the right Draw a closed circle on 7 and draw the line to the left
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Work Step by Step

$m\leq7$ means that all real numbers for the value of t are less than or equal to 7. Since m=7 is a solution, draw a closed circle on 7, draw the line to the left. $m\lt12$ means that all real numbers for the value of m are greater than 12. Since 12 is not part of the solution set, draw an open circle on 12 and draw the line to the right.
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