Could you guys help me with this question?

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).

Graph the equationy= x+3[tex]y = x + 3[/tex]

Divide. –4.2 ÷ 6 = a –0.7 b 0.7 c –7 d 7 me