Alene wants to buy a pencil pouch the cost 16.00. She must also pay 5% sales tax. If she pays with a $20 bill, how much change will she receive back

20 ! need which shows a difference of squares? 10y^2-4x^2 16y^2-x^2 8x^2-40x+25 64x^2-48x+9

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

David is spreading mulch on a triangular area of his flower bed. the coordinates of the vertices of the area are (1, 3), (9, 3), and (4, 6). what is the area of the triangle if each square has an area of 3 square feet?