Ill give brainliest if its right :)

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.

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

Determine if the outside temperature is a function of the time of day or if the time of day is a function of temperature and explain why or why not.