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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).

What expression is equivalent to 1/2(2+3x-6)

Write an algebraic expression for the word expression the quotient of c and 8