3. Which of the following are the coordinates of the vertices of the following square centered at the origin, with side length b?

OW(0,0), Z (0,6), S(6,6),T(5,0)
(0,0)=(-699
W
OW(6,6), 2 (6,-6),S(-6,-b),T(-8,6)

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?