Pls simplify 9a+3b-4a-2b

(40 points) i need some . an answer definition is appreciated as well.

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.)

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct