Mary is making pillows for her Life Skill class. She bought 2 ½ yards of fabric. Her total cost was $15. What was the cost per yard?

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

Find the power set of each of these sets, where a and b are distinct elements. a) {a} b) {a, b} c) {1, 2, 3, 4} show steps

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?