Calculați a)-11+(-120)
b)18+(-17)
c)+13(+34)
d)-15+(-27)
e) +56+(+27)
f)-32+(-181)

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