Refresh your High School Math skills

http://math-blog.com/2007/05/16/refresh-your-high-school-math-skills/

The mathematics that you learned in high school is classified as pre-calculus, and as you can expect it is propaedeutic to learn math at an higher level. It is normal that you forgot quite a few formulas, but having a good grasp of the essentials of precalculus can make a big difference when trying to master calculus.

now where did i put that graphing calculator..?