plz i have no idea what to do a store is having a sale on jelly beans and trail mix. for 5 pounds of jelly beans and 3 pounds of trail mix, the total cost is $17. for 7 pounds of jelly beans and 9 pounds of trail mix, the total cost is 37 . find the cost for each pound of jelly beans and each pound of trail mix.

Three students, javier, sam, and corrine, participated in a fundraiser where people donated a certain amount of money per lap that the student ran. each student also had some initial donations that were collected before the run. the equations that represent each student's total donation, y, based on the number of laps ran, x, is shown below. match each equation with the correct rate of change for that student.