If F(x)=4x-1 and G(x)=2x-4 what is (FoG) (x)?

What is the missing step in this proof ?

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Select the number of ways in which a line and a circle can intersect