Evaluate the following expressions: (13.7) + 25.4 + (-39 1/5) please show work thank u:)

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).

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4