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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 15:40
Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathanâs solution? jonathanâs answer is reasonable because there are two decimal places in the factors and two in the product. jonathanâs answer is unreasonable because there are three decimal places in the factors and two in the product. jonathanâs answer is reasonable because is 16, and 16 is close to 15.77. jonathanâs answer is unreasonable because is 8, and 8 is not very close to 15.77.
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Mathematics, 21.06.2019 16:00
12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ân', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?
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