You need to choose a shipping company. ship fast charges $2.00 per package plus $1.00 per pound. speedy delivery charges $3.00 per package plus $0.50 per pound. for what package weight do both companies charge the same price? what is the equation for fast ship? and for speedy delivery? solve using equations.

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.