What value, a, needs to be added to create a perfect-square quadratic?
x² - 6x + a

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)