Letters can replace numbers in simple mathematical problems. If M and N represent digits and MN+N=NM - N, then M equals
A. 7
B. 8
C. 9
D. 10
E. None of these

Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.