When using elimination to solve a system of equations, you first: A, eliminate the common coefficient and variable in both equations.

B. eliminate any variable in both equations.

C. eliminate both variables in both equations.

D. eliminate the coefficient in both equations.

Astudent draws two parabolas on graph paper. both parabolas cross the x-axis at (–4, 0) and (6, 0). the y-intercept of the first parabola is (0, –12). the y-intercept of the second parabola is (0, –24). what is the positive difference between the a values for the two functions that describe the parabolas? write your answer as a decimal rounded to the nearest tenth