The point a(5,11) is a reflected across the x axis what are the coordinates of a'?

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).

When turned about its axis of rotation, which shape could have created this three-dimensional object?

What are the coordinates of the midpoint of ab? ,1/2) /2,-1) ,-3/2) /2,-2)