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Lost on Practice Test, teacher gave us test without answers to probems

My professor gave our class a practice test. However, they not only didn't show how each problem is done, they also didn't even give us what the correct answers were. I'm really lost and have a test tomorrow. If anyone could give step by step solutions to the problems I would really really appreciate it. I've been working on these for the last 3 days and just can't seem to get anywhere.

Here is an image of all of the problems I have been working on. Please if anyone can post solutions to any of the problems at all, it would be a great deal of help (Nod)

-Quixotic

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