Solve each quadratic equation using the most efficient method. 3x2+21x=0

Joanie watched 1 out of three of a movie in the morning

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.

John has 1/2 pound of oranges to share with julie. if they share the oranges equally, how much will each of them have?