Un salón de clase tiene a m^2 de área. En el salón hay 25 mesas, de las cuales cada uno ocupa un área de p m^2, y 27 estanterías, de las cuales cada una ocupa un área de 4p m^2. Escribe una expresión algebraica que representa el área del salón de clase que queda libre.

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.