Solve using the quadratic function:
x^2-5x+8=0
A. x = 1, 4
B. x = 2, 4
C. No real solutions
D. x = -5, 8

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

In the triangle below, what is the length of the side opposite the 60° angle?

Which graph represents an exponential decay function?