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1) A mixture of 5 pounds of fertilizer A, 13 pounds of fertilizer B, and 4...

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Basic Math

1) A mixture of 5pounds of fertilizer A, 13 pounds of fertilizer B, and 4 pounds offertilizer C provides the optimal nutrients for a plant. Commercialbrand X contains equal parts of fertilizer B and fertilizer C.Commercial brand Y contains one part of fertilizer A and two partsof fertilizer B. Commercial brand Z contains two parts offertilizer A, five parts of fertilizer B, and two parts offertilizer C. How much of each fertilizer brand is needed to obtainthe desired mixture?

2) A chemist needs 10liters of a 25% acid solution. The solution is to be mixed fromthree solutions whose concentrations are 10%, 20% and 50%. How manyliters of each solution will satisfy each condition?

a) Use 2 liters ofthe 50% solution.

b) Use as little aspossible of the 50% solution.

c) Use as much aspossible of the 50% solution.

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