Solve the equation:
b - 1.6 ÷ 4 = - 3
b =...
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Find the domain of the following expression: 1/(√x)-2
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What is the result of adding the system of equations? 2x+y=4 3x-y=6
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The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?
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