can the measure of a complement of an angle ever equal exactly half the measure of the supplement of an angle

Liam's parents are driving three times as fast as liam is biking, but they left later than he did. if his parents caught up with him two hours after he left, how much later than liam did they leave?

Standard deviation of 19,29,21,22,23

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41