F(x) = x +4 and g(x) = 12x -6 what is f(3) + g (-1)

(a) 22

(b) 33

(c) -11

(d) 11

i am having a brain fart can someone explain how i get the answer to this?

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap