Round to the nearest tenth if necessary

Can someone answer this question? : )

For the feasibility region shown below find the maximum value of the function p=3x+2y

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