Complete all of the following steps to for each problem below. Write C for combine (add) or D for difference (D)Write (+) if the sum will be positive or (-) if the sum will be negativeDetermine the final answer8 + -2 = -9 + -12 = -35 + 25 = -19 + 40 = 

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.