Christopher has $15 in his savings account. he wants to buy a guitar. he plans to save $10 a week. prices for guitars at the music shoppe start at $130. which number line shows how long christopher will have to save to buy a guitar from the music shoppe?

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?