Write a problem based on the given information. 7.) c = cost per pound of plain coffee beans
C + 3 = cost per pound of flavored coffee
beans 2c + (c + 3) = 21

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