# Week 10- Math mid term

This week, since there is a mid term, we had time to review our preview units. There was several things that I have forgotten from previous units. As a result, I will now explain the things that I have forgot.

1. What does D and R stand for for Arithmetic and Geometric Sequence.
1. D is for the difference between 2 numbers and R is the ratio between 2 numbers.
2. How to find the discriminent.
1. Using $b^2-4ac$ we can find if there is a solution. If the solution is positive, there are 2 equations. If the soluton equals 0, there is only 1 solution. If the solution is negative, there are no solution.
3. If there is no x-intercept what do you say. 0 or none
1. On the unit test, I written down 0, however, the answer is non because the there is no intercept.
4. Can there be a negative as a radicand.
1. It is not a real number

From each unit, I have remembered the old thing that I have forgotten. Hopefully, now I can do better on the mid term!!!