Find mAB.

I need help!

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.

This question awards 100 ! i really don’t want to fail i will also mark you !

What does x = in this equation x+3+2x=x+5