The distribution of sample means uses to measure how much distance

is expected on average between a sample mean and the population mean.

-the standard error of M

-none of these

-the standard deviation of the sample

-the standard deviation of the population

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

step by step explanation: when u removing the parentheses and combined them that would be : x+3y-x-y=2y

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125.28

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d is ur answer hopes this i dont really know how to explain it to u.