What is the image of (4,-7) after a dilation by a scale factor of 22 centered at the origin?

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).

What ia the sum if the first 7 terms of the geometric series

Express -5 2/5 as an improper fraction.