Determine the vertex of the parabola:
y = 5x2 - 20x + 13
5, -7)
(2, -7)
(-7, -2)
(-2, -7)

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?

Find the area of the unshaded square

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)