How do I solve for:

B=.10(90,000-.40(90,000-B))

and

B=.10(90,000-.40(90,000-.40(90,000- B)-B)

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).

The measure of an angle is 117°. what is the measure of a supplementary angle?

What are the solutions to the following equation? |m| = 8.5 the value of m is equal to 8.5 and because each distance from zero is 8.5.