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Jo paid $14 for his shirt. It was originally priced at $22. What percent discount did he recive? A. 63.64% B. 36.36% C. 57.14%
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Tutor.com
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Step-by-step solutions to odd-numbered problems from dozens of pre-algebra textbooks.
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Hotmath
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A helpful scientific calculator that runs in your web browser window.
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Holt Online Learning
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Description of the properties of real numbers
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Algebra Help
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Gives a detailed explanation of how to use interval notation, followed by numerous examples, from very simple to quite complex.
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Connexions
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Answering questions on different number sets with scoring.
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Number Sets
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Some worked example problems that point out many common errors students make when solving them.
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Pauls Online Math Notes
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370000000 people watched the football champion ship on t.v how can this number be expressed in scientific notation
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Tutor.com
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