29-01-2018
Mathematics

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A metalworker has a metal alloy that is 25% copper and another alloy that is 65% copper. How many kilograms of each alloy should the metalworker combine to create 120 kg of a 49% copper alloy? The metalworker should use nothing kilograms of the metal alloy that is 25% copper and nothing kilograms of the metal alloy that is 65% copper.

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29-01-2018

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01-05-2020

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48kg

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