Whats the answer to the problem in the picture

Perform the required operations on the following functions given: f(x)= 3-x; g(x)= -2x find g[f(x)]

The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.

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?