Answer:
A.( 3m+28)/4
Step-by-step explanation:
So basically since it is addition we just add 9 to -2 to get 7. So then the equation becomes (3m/4)+7. Then we will multiply 7 by 4 to get common denominator so it will be (3m+(7*4))/4 which is (3m+28)/4.
Step-by-step explanation:

Answer:
each student gets 2 bars and a quarter of one (2.25 or 2 1/4)
Step-by-step explanation: