Match each number to the letter that represents its position on the number line.

HELP ASAP

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).

If you could answer these your a life saver

Find the value of x. give reasons to justify your solutions! l, m ∈ kn