Your lunch came to $9.76 if you want to leave a 15% tip how much will you pay in total

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.

What is 10+10+20 about the origin the square root of a triangle.

Keith runs 5 miles in 38 minutes. at the same rate, how many miles would he run in 57 minutes