Answer:
C. m+n/2
Step-by-step explanation:
Factor out the 3 in the numerator and apply the difference of squares, factor out the 6 in the denominator, and reduce where applicable. It'll all cone out to look like option C.
Answer:
81 7/12
Step-by-step explanation:
75 5/12 - (-6 1/6)= 81 7/12