Tom wants to forget tickets online so that he and his three friends can go together 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 online. Write an expression in terms of n that represents the cost for ordering n tickets online.

cost for ordering n tickets online. = 16n+2.50

where n is the number of tickets ordered.

Step-by-step explanation:

Given that when purchasing tickets to a waterpark on internet

he has to pay 16 dollars per ticket and also an additional service cost of 2.50 dollars.

This 2.50 dollars is fixed irrespective of number of tickets he orders

Hence if n tickets are purchased online,

Ticket cost to be paid = 16 (n) = 16n

One time service cost = 2.50

Thus the cost for ordering n tickets online. = total cost

C = 16n+2.50

where C represents the cost, and n is the number of tickets ordered.

Here we substitute n=4, to get his particular cost

C = 66.50 dollars

n = (16x3) + 2.50