For which system of equations is (2, 2) a solution?
a.
–3x + 3y = 0
x + 6y = 10

b.
–2x + 5y = –6
4x – 2y = 4

c.
5x – 2y = –6
3x – 4y = 2

d.
2x + 3y = 10
4x + 5y = 18

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 is the difference between the points (4, 7) and (4, -5)? a. 0 units b. 2 units c. 4 units d. 12 units

For each polynomial, determine the degree and write the polynomial in descending order. a. –4x^2 – 12 + 11x^4 b. 2x^5 + 14 – 3x^4 + 7x + 3x^3