M is the midpoint of , cm = 2x + 3, and md = 3x – 6. what is cd? answer

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asked Dec 14, 2018 76.0k views

5 votes

M is the midpoint of , cm = 2x + 3, and md = 3x – 6. what is cd? answer

Mathematics
high-school

Siong Thye Goh asked

by Siong Thye Goh

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1 Answer

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If M is the midpoint of CD, CM = 2x+3 and MD = 3x-6, then:

MD = CM
3x - 6 = 2x + 3
3x - 2x = 3 + 6
x = 9

CM = 2x+3 = 2*9+3 18+3 = 21
MD = CM = 21
CD = CM + MD = 21 + 21 = 42

Charlee Chitsuk answered Dec 18, 2018

by Charlee Chitsuk

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