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Mathematics, 21.06.2019 13:30
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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Mathematics, 21.06.2019 20:30
The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?
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Mathematics, 21.06.2019 21:00
Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?
Answers: 1
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