Last week rachel walked 2 3/5 miles per day on each of the 7 days. during the same week, she also jogged 5 3/4 miles per day on 4 days. what was the total number of miles rachel walked and jogged last week?

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