Mathematics, 26.10.2020 23:50, maddieb1011

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?

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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...