What is the prime factorization for 180? A. 4 · 5 · 9
B. 2 2 · 5 · 9
C. 2 · 9 · 10
D. 2 2 · 3 2 · 5

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.

Find four solutions of the given function. write the solutions as ordered pairs. 4x – y = 4

20 points - ! gia decides to buy square tiles to cover her kitchen floor. the tiles are 18” square tiles and cost $3.85 each. how much will it cost to tile her kitchen if the measurements are 11’ x 12’?