Write a word problem using 9 and 10 as factors. Write an equation to solve to problem

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).

How do i solve uniform motion problems?

In the diagram, gef and hef are congruent. what is the value of x