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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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Write and solve a real word problem that involves determining distance on a coordinate plane
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Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost
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