Clarence is 42 inches tall. His brother Charlie is 37 inches tall. How much taller is Clarence?

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 are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.