Mathematics, 25.06.2019 11:30 Rocket3138

If x is the average (arithmetic mean) of m and 9, y is the average of 2m and 15, and z is the average of 3m and 18, what is the average of x, y, and z in terms of m? a) m+6 b) m+7 c) 2m+14 d) 3m+21

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If x is the average (arithmetic mean) of m and 9, y is the average of 2m and 15, and z is the averag...

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