A recipe uses brown sugar and caster sugar in the ratio 3:2. What fraction of the sugar is caster?

Solving algebraic equations 2m+3=11

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.

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?