Today, everything at a store is on sale. The store offers a 20% discount. The discount price of a hat is $18. What is the regular price?

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

What can you determine about the solutions of this system

P= price tax is 4% added to the price. which expression shows the total price including tax?