SAT Practice Test #1 (Section 3: Non-Calculator) Part 1 of 2

I explain Section 3 (Non-calculator Math Section) of the SAT Practice Test #1. I am actually doing the section) more or less in real time without working out everything and scripting in advance so you get to see my errors and missteps as I work through them. Hopefully all the answers are correct, please indicate in the comments if you notice an error in my math, reasoning, following directions, ect.
Yes, I saw that I did not do #11, so I included it at the end of the next part. Sorry, the perils of doing them for real instead of scripting.