Mathematics, 15.04.2021 01:40 224509
A chemist needs a 60% acid solution. How many liters of a 10% acid solution and an 80% acid solution must be mixed together to obtain 126 L of the 60% acid solution? Enter only the number of liters of the 10% solution that is needed.
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Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries
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If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?
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A chemist needs a 60% acid solution. How many liters of a 10% acid solution and an 80% acid solution...
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