Solve the system of linear equations algebraically

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).

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t