Proportions

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Algebra Terms

A helpful scientific calculator that runs in your web browser window.

This site has a tutorial and then some examples of how to write proportions to solve for missing lengths of similar polygons

This site helps to explain the different types of tons and how to convert them.

The easy steps behind Combined Work Rate Problems: These problems have two people (or machines) working at different rates and you need to find the combined time to finish the job.

Description of direct variation and the constant of variation; with a graph and related question