Which expression is equivalent to -6 ( -2/3 + 2 x)?

the options are:
-4 minus 12 x
-4 + 2 x
4 minus 12 x
4 + 12 x

Plz heeeeeeelp plz give me the answer

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

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm