A class used cars and buses to go on a field trip. They used 10 vehicles to go on the trip. Each car holds 5 students and each bus holds 30 students.
If 250 students went on the trip then how many of each type of vehicle did
the class use?

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