John bought 4 Bubba Burgers and 3 sodas for $28.75. Sarah bought 5 Bubba Burger and 6 sodas for $41. Algebraically determine the cost of 1 burger. (If you answer was 13 dollars and 50 cents, you would enter it below as $13.50 - make sure you include the dollar sign.)

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