What is the simplified form of the expression? 1/3(21m + 27)

A. 63m + 9
B. 7m + 9
C. 7m + 81
D. 7m + 27
i need help plz don't know how to do it.

2 answers

What is 1/3 of 21m?
What is 1/3 of 27?
7m + 9