What is the midpoint of a segment with endpoints at (-1,-5) and (-5,9)?

a. (2,-3)

b. (3,-2)

c. (2,2)

d. (-3,2)

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?