REASONING A high school band was selling ride tickets for the school fair. On the first day, 250 children’s tickets and 150 adult tickets were sold for a total of $550. On the second day, 180 children’s tickets and 120 adult tickets were sold for a total of $420. What is the price for each child ticket and each adult ticket? a. Select a system of equations to represent this situation. Let x represent the cost of children’s tickets and y represent the cost of adult tickets.

A)
250x+120y=550 ; 180x+150y=420

B)
180x+150y=420 ; 180x+120y=420

C)
250x+150y=550 ; 180x+120y=420

D)
250x+150y=420 ; 180x+120y=550