Help please.

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

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

Can anyone me get through my algebra 2 class? the only class i need to graduate..