What is the value of A when we rewrite 8^x as A^-x/9

Look at the example below which shows how the product property of radicals is used to simplify a radical. use the product property of radicals to simplify the following radical.

John kept track of how many baskets were made in a basketball game. after 4 minutes, 5 baskets were made. how many baskets were made between 9 and 10 minutes? a. 0 b. 1 c. 2 d. 3

If f(x) = 5х – 2 and g(x) = 2х + 1, find (f – g)(x).