Write fractions in simplest form. -9/2 + 5/12

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Which equation represents the function on the graph?

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)