Is it possible for a cubic polynomial function to have a zero?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

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).

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?