What is 4/5 × 7/20 in fraction form

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

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Can some one me with these questions