Which of the following statements are TRUE? (Select all that apply) If two angles are vertical angles, then they are congruent.

If two angles are supplementary, their measures add to 180º.

If two angles do not form a linear pair, then the measures do not add up to 180º.

If the measures of two angles add up to 180º, then the angles form a linear pair.

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