Which of the following are possible equations of a parabola that has no real solutions and opens downward? y > = -(x + 4)2 - 2 y > = -(x + 4)2 + 2 y > = -x2 - 2 y > = (x - 4)2 + 2 y > = -(x - 4)2 - 2

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school