I have 3 algebra problems that I have no idea how to work. It's the beginning of the school year and our teacher gave us a diagnostic worksheet to see what we know, but she still wants the answers to be correct. So, if you could tell me how to do each of these problems in the simplest way possible, I'd really appreciate it.

1.) Solve 3y - 2 > 5y. Graph the solution.

2.) Graph 2x + 4y < 1

3.) Factor 2x^2 - 5x - 12