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If the distance from point (C2, m) to point (4, C1) is 10 units, what is the positive value of m?
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If the distance from point (C2, m) to point (4, C1) is 10 units, what is the positive value of m?
Answer: 7
Explanation:
First, use the distance formula to form an equation that can be solved for m :
m 2 + 2 m C 63 = 0
Now factor m 2 + 2 m C 63:
( m + 9) × ( m C 7) = 0
m = 7, m = C9.
The positive value of m is 7.
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