Given: △ABC, m∠A=60° m∠C=45°, AB = 9
Find: Perimeter of △ABC
Area of △ABC
ABC is scalene

43lbs of tomatos cost $387. how much would 41lbs cost

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^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.