A variable needs to be eliminated to solve the system of equations below. Choose the correct first step. 8x+9y= -82
-x-9y=89

Solve the system of equations. y= 2x y= x^2 - 15

Which number completes the system of linear inequalities represented by the graph? y> 2x – 2 and x + 4y 2 et 2 3 4

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.