Last week, the ratio of laptops to desktops sold at a computer store was 23. Twenty-seven desktop models were sold. How many laptop models were sold?
The number of laptop models that were sold is

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