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

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

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User Siong Thye Goh
by
8.1k points

1 Answer

4 votes
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
answered
User Charlee Chitsuk
by
9.0k points
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