Solve for x MUST SHOW ALL WORK IN ODER
(X-8)

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).

15/16 as a decimal rounded to the nearest hundredth

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)