Answer
8.0
Work Step by Step
Applying the Pythagorean Theorem:
$$ x^2+15^2=\left(x+9\right)^2 \\ x^2+225=x^2+18x+81\\ -18x=-144 \\ x=8.0$$
Geometry: Common Core (15th Edition)
by Charles, Randall I.
Published by
Prentice Hall
ISBN 10:
0133281159
ISBN 13:
978-0-13328-115-6
Chapter 12 - Circles - 12-1 Tangent Lines - Practice and Problem-Solving Exercises - Page 767: 14
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
