Someone pls find the range! multiple choice available!

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).

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

Arational number that is equivalent to -20/4?