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Mumz [18]
2 years ago
9

Instead of dividing 220 x 5 double both numbers and mentally calculate the quotient

Mathematics
1 answer:
kobusy [5.1K]2 years ago
3 0
220 * 5 = 220 * 2/2 * 5 * 2/2 = 440 * 10 / 4 = 110 * 10 = 1100
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How much pure water must be mixed with 10 liters of a 25% acid solution to reduce it to a 10% acid solution?
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8 0
3 years ago
Which of the following is the weakest r-squared value? Which one is the strongest?
Setler [38]

Answer:

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7 0
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