At Pizza Pi, 30% of the pizzas made last week had extra cheese. If 15 pizzas had extra cheese, how many pizzas in all were made last week?

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3

it would take 7/10 of an hour too fill the pool.

step-by-step explanation: