#1) You must think about what you are doing. There never has been, and never will be, a "lol" theorem.
You have y = 2x-3
a) 90º rotation about the origin. Think on its properties.
Is there a point that will be on both lines?
Is there a predictable point? How about (0,-3). Where will that go?
Is it acceptable to leave it solved for x, rather than for y?
b) Reflection on y-axis. This is the easiest, I think. Simply substitute -x for x. Done.
c) 2 to the right. This one is almost as easy as b).
The slope will not change.
Where will (0,-3) go? (2,-3)? You're almost done.