From Maria Lando's problem at [url]http://www.imakenews.com/eletra/go.cfm?z=themathmom%2C595863%2CbmP9VvPR%2C5753292%2Cblc9S0M[/url]
A nice linear system in an intuitive context.
- Target Group (Age)
- 11 – 14
- Language
- English (United States)
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