Use the distributive property to multiply 4(-7x-9y-9)

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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Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =