Using the linear combination method, what is the solution to the system of linear equations 7x-2y=-20 and 9x+4y=-6?
O (-3,2)
O (-2,3)
O (2, -3)
O (3,-2)

The 7th grade has collected $200 for a field trip that would cost $600. the teachers decided to ask $50 from additional students to cover the cost. how mny students must pay to cover the cost ? a 16studentsb 80studentsc 160studentsd 8students show work