triangle a outside tab length 9 cm triangle be two sides have length 10 cm and the included angle measures 60° Triangle C two angles measure 50° triangle database has length 8 centimeters and base angles measures 45° which triangle is not a unique triangle​

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?