-3 2/7 + -6 1/6
Help with this please I dont know

Can (3,5 and square root 34) be sides on a right triangle?

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).

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x