Select the correct answer from each drop-down menu. Consider this expression.
(a + 9) (* - 2) - 9x - 6
What expression is equivalent to the given expression?
-

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