Asporting goods store is having a closeout on a certain style of running shoes. they are marked 55% off the regular price. the regular price is $79.95. find the amount of the discount and the sales price.

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

Math it's appreciated. (picture provided)

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