Complete the ordered pair so that it is a solution of2/3 x + y - 1 = 0.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

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.