1. the ordered pair (2,7) is a solution of the equation: y - x = 5
a. true
b. false
2. the ordered pair (-3,10) is a solution of the equation: y + 4 = -2x
a. true
b. false

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