# Math Help - I'm in Pre-Calc but have forgotten some Basic Algebra. Help?

1. ## I'm in Pre-Calc but have forgotten some Basic Algebra. Help?

So I am currently in Pre-Calc and we first have to do a review of Algebra I, which I forgot most of. This assignment is effort only so I could easily just write garbage and get an A but I want to remember this. Could you just explain how I'd do a problem, not solve it for me.

Links to problems (got an error when trying to insert picture)
1. http://i.imgur.com/uEyR5Xr.jpg
2. http://i.imgur.com/FUUQ6SY.jpg
3. http://i.imgur.com/0O0XF5H.jpg
4. http://i.imgur.com/xXcinfc.jpg

2. ## Re: I'm in Pre-Calc but have forgotten some Basic Algebra. Help?

Rules of exponents:
$a^ma^n= a^{m+n}$
$(a^m)^n= a^{mn}$
$\frac{1}{a^n}= a^{-n}$