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Alice bought m pens for n dollars each, and Ben bought n pens for m dollars each. Which of the following is the av [...]
Posted by Gail Kaufmann
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There is a great website that helps your child with his or her study skills.
http://www.testtakingtips.com
I have l [...]
Posted by Cindy
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As a quick suggestion for conic sections - if you can complete the square for an equation in general form...... I w [...]
Posted by Joe Perlman
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http://www.youtube.com/watch?v=wCVDO39a60c
[...]
Posted by Joel Crandall
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