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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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Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?
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Which of the following is the best first step in solving the equation below? 4+2㏒³x=17
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What is 46+56+3+17+30+...
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