A62 1/2 pound bags of concrete mix has 3/5 of its weight made up and sand and small stones. the stones make up 1/4 of the weight. what is the weight of the stones in the bag of concrete

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.

Determine the standard form of the equation of the line that passes through (-2,0) and (8,-5)

Find the axis of symmerty for x y=x squared -4x-8