Which two numbers are 7.5 units away from 0 on a number line?

Which of the following best describes the delian problem?

What is the approximate value of  x  in the equation below.–3.396–0.7080.3040.955

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