Xz is a common external tangent to circles w and y. what is the distance between the two centers of the circles? round to the nearest hundredth.

Is a currency whose value is tied to another currency, meaning that the exchange is fixed

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).

Need this asap if anyone can i would be very grateful. if you could show workings that would really