Please help ill give brainliest and 5 stars

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.

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.