SOLUTION: a contractor mixes concrete from bags of premix for small jobs. How many bags with 6% cement should he mix with 4 bags of 9.5% to produce a mix containing 7% cement
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Question 1141133: a contractor mixes concrete from bags of premix for small jobs. How many bags with 6% cement should he mix with 4 bags of 9.5% to produce a mix containing 7% cement Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! a contractor mixes concrete from bags of premix for small jobs. How many bags with 6% cement should he mix with 4 bags of 9.5% to produce a mix containing 7% cement
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Use B bags of 6%
4*9.5 + B*6 = (4+B)*7
