Ammar hikes 2 3/4 miles of nature trail in 1 hour and 15 minutes. how many miles of trail does ammar hike per hour?

Evaluate the given expression if m=45 |-3m|

G(x) = 2 sin(2x - π) + 4. using complete sentences, explain how to find the minimum value for the function.

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.