If 14m − n = p, then which of the following represents the average (arithmetic mean) of m, n, and p, in terms of m?
Choose the correct option:
A) 2m −1
B) 4m
C) 5m
D) m/5
E) 6m/5
14m - n = p   Add n to both sides:   14m = n + p   Add m to both sides:   15m = n + p + m   Now, divide both sides by 3   5m = (n + p + m)/3 = the average of n, p, and m   5m
<result>C</result>
If 14m − n = p, then which of the following represents the average (arithmetic mean) of m, n, and p, in terms of m?