There are 25 questions in a quiz. Every correct answer scores 3 points Each incorrect answer loses 2 points. A question not answered scores 0 points. It is possible to finish the quiz with a negative score. A student answers 15 questions 10 are correct how many points does he score

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?