Answer
x=3
JH=30
MN=15
Work Step by Step
JH=2MN
2x$^{2}$+4x=2x$^{2}$+12
4x=12
x=3
JH=2(3)$^{2}$+4(3)
JH=18+12
JH=30
MN=(3)$^{2}$+6
MN=9+6
MN=15
Elementary Geometry for College Students (5th Edition)
by Alexander, Daniel C.; Koeberlein, Geralyn M.
Published by
Brooks Cole
ISBN 10:
1439047901
ISBN 13:
978-1-43904-790-3
Chapter 4 - Review Exercises - Page 214: 24
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