Which formula is used to calculate the standard deviation of sample data? X, - x
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(*1–4) * +(X2–4) ? + +(*w+x)?
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SE
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Which expression gives you the distance between the points (5,1)and(9,-6)

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]