Combine like terms to create an equivalent expression

What is the value of r of the geometric series?

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).

The total number of dental clinics total for the last 12 months was recorded