After doing this i got 1/4. can someone plz show and explain what i did wrong? 7- 3r = r - 4(2 + r)

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.

Which of the following is an irrational number

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)