Check all of the points that are solutions to the system of inequalities

Plz me plz i need and plz delte this after answer

Aline on the wall and a line on the floor are skew. always, sometimes, or never?

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