When you graph a system of linear equations, why does the intersection of the two lines represent the solution of the system?

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).

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did