Imma leave the door ope​

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).

Asystem of equations has 1 solution.if 4x-y=5 is one of the equations , which could be the other equation ?

Find the value of x. give reasons to justify your solutions! h ∈ ig