Given angle a b c , in which line ad bisects angle bac. if m angle b=64 and m angle c =42, determine m angle bad.

Which expression gives the area of the triangle shown below

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

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.