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July 29, 2015

Homework Help: math

Posted by jay on Monday, July 5, 2010 at 11:59pm.

A scientist wants to combine two metal alloys into 20 kg of a third alloy which is 60% aluminum. He plans to use one alloy with 45% aluminum content, and a second alloy with 70% aluminum content. How many kilograms of each alloy must be combined?

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