Study the stem-and-leaf plot. How many cars get between 30 and 50 miles per gallon? 55 POINTS
1. 6 cars
2. 7 cars
3. 8 cars
4. 20 cars

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?