Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 1 - Solving Linear Equations - 1.4 - Solving Absolute Value Equations - Exercises - Page 33: 33

Answer

The absolute value equation is $|x-5.5|=3.5$

Work Step by Step

The given solutions are $x=2$ and $x=9$ Minimum value $=2$ Maximum value $=9$ Halfway point $=5.5$ Distance from halfway point $=3.5$ Absolute value equation is $\Rightarrow |x-$halfway point$|=$distance from halfway point Substitute all the values. $\Rightarrow |x-5.5|=3.5$ Check $x=2$. $\Rightarrow |2-5.5|=3.5$ $\Rightarrow |-3.5|=3.5$ $\Rightarrow 3.5=3.5$ True. Check $x=9$. $\Rightarrow |9-5.5|=3.5$ $\Rightarrow |3.5|=3.5$ $\Rightarrow 3.5=3.5$ True. Hence, the absolute value equation is $|x-5.5|=3.5$
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