Good, Productive Weekend

Regarding AM, I have 5 more testable objectives to work on tonight. Once I've finished, I will be all caught up. I still have to do the assigned Cumulative exercises. I will also download graphmatica. Objectives I still need help with are 33, 34, and 35, especially the latter two. For the most part I understand everything. A question I still have is what the x means in the equations.