What is the area of the shaded region

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?

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?

What is the approximate mark up percentage rate before m equals $1740 marked up from p equals $19,422