Solve Kx + 12 = 3kx for x

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Sketch the vector field vector f( vector r ) = 8vector r in the xy-plane. select all that apply. the length of each vector is 8. the lengths of the vectors decrease as you move away from the origin. all the vectors point away from the origin. all the vectors point in the same direction. all the vectors point towards the origin. the lengths of the vectors increase as you move away from the origin.

Ithink i know it but i want to be sure so can you me out ?