Mathematics, 21.10.2019 20:40 jskdkfjf
In a lottery, numbered balls from 1 through 49 are placed into a spinning drum. every 10 seconds a ball rolls down a tube to become one of the six numbers to be drawn. at the end of the draw, the remaining 43 balls have an equally likely chance of becoming the bonus number. what is the name of this method of sampling?
simple random sampling
systematic random sampling
stratified random sampling
convenience sampling
Answers: 1
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The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103
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In a lottery, numbered balls from 1 through 49 are placed into a spinning drum. every 10 seconds a b...
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