The triangles in each pair are similar. Find the unknown measures. PLS HELP!!

How many grams the dog will eat in 3 days?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

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.