At the barber shop, Oliver's haircut was $15. He gave the barber a 18% tip. how much is the tip? what is the total amount?

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

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.