How many times does 1 and 7/8 go into at least nine but less than 10?

Which of the following is the true for f(x) = 5cos

Asequence is defined recursively using the formula f(n + 1) =f(n) - 5. which sequence could be

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.