8 * 6 + (12-4) / 2 equals to what

What point is the projection of q on a) r b) s c) t

For each proportion find the unknown number x 1/5/8=×/15

Astudent draws two parabolas both parabolas cross the x axis at (-4,0) and (6,0) the y intercept of the first parabolas 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