If 540 people preferred hamburgers, how many people preferred pizzia

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Which is f(5) for the function –2x2 + 2x - 3?

An object is translated by (x + 4, y - 2). if one point in the image has the coordinates (5, -3), what would be the coordinates of its pre-image? (9, -5) (1, -5) (9, -1) (1, -1)