Can someone please help?

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

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Apiling for a high-rise building is pushed by two bulldozers at exactly the same time. one bulldozer exerts a force of 1250 pounds in a westerly direction. the other bulldozer pushes the piling with a force of 2650 pounds in a northerly direction. what is the direction of the resulting force upon the piling, to the nearest degree? a. 65 n of w b. 25 n of w c. 45 n of w d. 35 n of w