Please answer using things like vElim;1-2

Kevin is an insurance salesman. when he sells a policy, he makes 20 percent of the policy premium (p) up front; then each year the policy is active, he receives 15 percent of the original premium. which equation could be used to figure his total commission on a policy that has been active for five years? c=0.80p c=0.20p + 0.15p c=0.35p + 4(0.15) c=0.95p

In which form is the following function written? y = - 2(x – 3)(x + 5)

How do you determine if an ordered pair is a solution to a given equation?