Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Prerequisites - Review Exercises - Page 62: 11



Work Step by Step

$d(a,b)=|a-b|=|b-a|$ (page 7) Now make $a=x$ and $b=7$. At least 4 means $\geq4$ $|x-7|=|7-x|\geq4$
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