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Mathematics, 21.06.2019 22:00
Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of
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Mathematics, 22.06.2019 01:00
Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.
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Mathematics, 22.06.2019 03:30
Find the solution set for this equation: t^2+7t=0 separate the two values with a comma.
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