5(-7)+9(4) I am confused on this problem

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

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?

Given ab and cb are tangents of p, and m =10°. what is the measure of abp?