Patty needs a total of 80$ to buy a bicycle .she has already saved 35$. if she saves 10$ a week. from her earnings ,what is the best number of weeks she must work to have enought money to but a bicycle? a) 3 b)4 c)5 d)8

Is it greater than or less than7*3_9*2

Having a hard time understanding this question (see attachment).

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?