After school, Tony biked toward the mountains at a constant rate of 8 mph. An hour later, Terry biked the same route at a constant rate of 12 mph. Let t = Length of time Tony had been biking when Terry caught up. Which expression represents how long Terry had been biking when he caught up with Tony? A. t+l B. t-l C. l-t D. t/l

What sums are equal to 6/12? choose all answers that are correct a.6/12+6/12+6/12+6/12+6/12+6/12 b.2/12+1/12+1/12+2/12 c.5/12+1/12 d.1/12+1/12+1/12+3/12 plz : )

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.

Find │7│. a. 1 over 7 b. –7 c. 7 asap i always mark brailiest who me so