Solve for x. negative six x plus nine is equal to negative twenty onefirs one i will make them brainliest

How can we find the measure of an exterior angle if we know the measurement of an interior angle

The value √10 and √15 are plotted on the number line

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).