4.is this addition or Division

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

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

The figure shows the front side of a metal desk in the shape of a trapezoid. what is the area of this trapezoid? 10 ft²16 ft²32 ft²61 ft²