Solve the system of equations.

x + y + z = 9
-2x + y + 2z = 3
x - 4y - z = 2

With this question! what is process of elimination? ? p.s. my brothers acc got banned so add his new one @ yamauchiyamyam17

Describe the relationship between the angles of similar triangles and the sides of similar triangles

The mass of a marine organism, in pounds, p years after it is born is given by the polynomial function r(p) = -4p2 + 300p. find the mass when p = 20 years.