Could someone explain this please! The age of Mike's brother is 12 less than 4 times Mike's age. The sum of their ages is 28. Find the ages of Mike and his brother.
Mike is (a) and his brother is [b].

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