F(x)=9x+7 find f(3c+1)

Classify each polynomial by its degree and by its number of terms.

Acommunity group sells 2,000 tickets for its raffle. the grand prize is a car. neil and 9 of his friends buy 10 tickets each. when the winning ticket number is announced, it is found to belong to neil's group. given this information, what is the probability that the ticket belongs to neil? a.1/5 b.1/10 c.1/200 d.1/4

I'll give brainliest if you answer right : )