Hannah lost four points on a test and earned four points on an extra credit question what does the sum of 0 mean in the description of this situation?

Hello everybody. can anybody me come up with detailed study plan on what topics to study from algebra 1 & 2, trig, and any other topic nesscery for success as a new beginner in pre-calculus. i dont have much math history but the basics. this will greatly me.

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Devonte is balancing his checking account. his account statement does not include a deposit of $107.00 that he made on november 1st. what is devonte’s actual account balance?