Which of the following systems of equations has the solution(1,2)?

Problem fathi wants to print out a pdf document that is 48 pages long. to save paper, he decides to print on both sides of each sheet and to print two pages on each side of the sheet. how many sheets of paper will he need?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2