A grocery store sells 1 pound of chicken for $3 and 1 pound of pork for $4. If one day it sells a total of 15 pounds of meat and makes $50, how many pounds of chicken and pork
did it sell?

How do i do this using elimination 2x+3y=12 x-y=6

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.

Could someone me with this question i’ve been stuck on it for 20 minutes