Abox contains 3 plain pencils and 5 pens. a second box contains 6 color pencils and 2 crayons. one item from each box is chosen at random. what is the probability that a pen from the first box and a crayon from the second box are selected?

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