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Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).
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Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?
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The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16
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Solve for s: 6.49s + 8.32 = 27.79...
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