I'm trying to find a place that has guided walkthroughs/answer guides for intermediate algebra, college algebra, and precalc. Maybe trig, also. Any ideas?
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I have found good results at www.khanacademy.org. You can sign up for an account, watch tutorials, practice exercises in a pedagogical order, and track your progress. Another site that has a lot of good walkthroughs is www.patrickjmt.com, but without the exercises. Best wishes.
I think Art of Problem Solving is a good place to get several Questions on algebra or what ever topic you want in various levels of difficulties. Art of Problem Solving Website : http://www.artofproblemsolving.com