HELP CAN SOMEONE DO THIS STEP BY STEP PLEASE

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

Iam stuck on one problem. my mind is in absoloute vacation mode. i literallty just need to finish this to be done will give brainliest and all my points if i have to! 1- point free throw and 2- point feild goal. he made 35 shots, and scored 62 points how many of each shot did he make in 1 minute? (i already did the math. he made 8 1-point free throws and 27 2-point feild goals.) 1. write two equations for the problem. (i had a major brain fart.)

2.5 milligrams is equivalent to how many grams