A class of 195 students went on a field trip. They took 7 vehicles, some cars and some buses. Each car holds 5 students and each bus hold 45 students. If x represents the number of cars and y represents the number of busses determine which of the following systems of equations model this scenario. Ox+y=195 7x+5y = 45 Ox+y=7 5x+45y=195 Ox+y=45 5x + 7y = 195 Ox+y=745 x+5y= 195