Answer
3.5 or -3.5
Work Step by Step
If A=0, then T must equal 7 or -7 for $\overline{AT}=7$. To find the midpoint, find the average of the two points. This gives $\frac{0+7}{2}=3.5$ and $\frac{0-7}{2}=-3.5$.
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 1 - Tools of Geometry - 1-3 Measuring Segments - Practice and Problem-Solving Exercises - Page 24: 27
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