6apples for $1.00; 15 apples d dollars ? round to the nearest hundredth

What is the missing constant term in the perfect square that starts with x^2 -20x

The vertices of a rectangle are given in the columns of the matrix . if is found to perform a transformation, what are the coordinates of the transformed rectangle? (0, 0), (0, –3), (–3, –3), (–3, 0) (0, 0), (0, 3), (3, 3), (3, 0) (0, 0), (0, 3), (–3, –3), (–3, 0) (0, 0), (0, 3), (–3, 3), (–3, 0)

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left