brother you lazy.
This is just simple Algebra 2 stuff...
then why don't you do it for her?
I'll help you with a few, but Algebra 2 was a little bit ago so you may not be able to trust me :P
Did most of this months ago. Some of this is a bit too in-depth to apply to anything irl.
13. 15;
I agree. Why would you ever use imaginary numbers in such functions? I dunno... math often seems so pointless.
http://www.wolframalpha.com/