Polygon a is similar to polygon b. the sides of polygon a are twice the length of the corresponding side of polygon b. the perimeter of polygon a is 100. what is the perimeter of polygon b? a 50 b 200 c 100 d 10

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?