I have 12 cups of chocalate to put into ⅓ cup containers how many containers do i need to buy. Plss help
and explain

Find a number such that if you add 8 and divide the result by 4 you will get the same answer as if you subtracted 3 from the original number and divided by 2

Let f(x) = 3 − x . find the average rate of change of f(x) from x = a to x = a + h and simplify your answer so that no single factor of h is left in the denominator.

What are the exclude value of mn+3m