The answer to this question is 42m+116.
1. You use the distributive property.
9(m+8)=9m+72
11(3m+4)=33m+44
Which would give you 9m+72+33m+44
2. Simplify. (Add like terms)
9m and 33m are like terms. So, 9m+33m would be 42m.
72 and 44 are like terms. 72+44=116
Your final answer will be 42m+116, since that is the most simplified form.