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Lessons and Tutoring - Reviews. The reviews below refer to free (or free-to-try) ...

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An Ordered Listing of the Lessons. The Purplemath lessons have been written ...

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A listing of reviewed algebra web sites, organized by category; includes ...

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Proportions are built from ratios. A "ratio" is just a comparison between two ...

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"Linear" equations are equations with just a plain old variable like "x", rather ...

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Solving by Addition / Elimination (page 5 of ... Solving Systems of Equations by ...

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Exponents are shorthand for repeated multiplication of the same thing by itself.

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Discusses the concept of functions versus relations, and demonstrates ways of ...

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Explains how to compute the mean, median, mode, and range of a list of ...

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Practical algebra lessons that emphasize the practicalities of understanding ...

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Algebra and pre-calculus (excluding trigonometry). Topics in algebra and ...

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Links to web sites offering quizzes and worksheets; reviewed by Purplemath.