What is the greatest common factor of 72x^2y and 18xy?
select one of the options below as your
a. 9x
b. 9xy
c. 18x
d. 18xy

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