Final answer:
The coefficient of the term 3m in the expression m^2 + 3m + 15 is 3.
Step-by-step explanation:
The coefficient of a term in an algebraic expression is the numerical factor that is multiplied by the variable(s) in the term. In the given expression m2 + 3m + 15, the term with m is 3m. The coefficient in this case is the number 3, as it is the numerical factor directly in front of the variable m. Therefore, the coefficient of the term 3m is 3.