What number would go in the blank? (3 • 5) • 2 = 3 • (__ • 2)

10

5

2

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).

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

Determine if the equation defines y as a function of x: 2xy = 1. yes o no