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Ametalworker has a metal alloy that is 30? % copper and another alloy that is 55? % copper. how many kilograms of each alloy should the metalworker combine to create 90 kg of a 50? % copper? alloy?
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The acceleration of an object due to gravity is 32 feet per second squared.what is acceleration due to gravity in inches per second squared?
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At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.
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Which pair of fractions are proportional
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