Solve for n. −5/6n=40 what is the answer

a.−56

b.−48

c.48

d.56

In the diagram of circle a what is m

How do you solve a question like this?

Find the percent cost of the total spent on each equipment $36, fees $158, transportation $59 a. 14%, 62%, 23% b. 15%, 60%, 35% c. 10%, 70%, 20% d. 11%, 62%, 27%