Can someone pls help me

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online

Give all possible names for the line shown. calculation tip: lines can be written with either point first.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g