What is 5/4 simplified?

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

Solve the equation -9p - 17 =10 a -3 b. 16 c. 18 d -16

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?