Angle RSU is complementary to angle UST. Angle QSR is congruent to angle RSU. Lines Q, R, U, and T extend from point S from left to right. Angle R S T is a right angle. Which statement is true about angles UST and QSR? They are complementary. They are supplementary. They are congruent. They are obtuse.

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

Someone me what is the area of this figure? 18m 18m 8m 16m

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.