Identify a benchmark you can use to find an equivalent percent for 4/10

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?

Statement: if two distinct planes intersect, then their intersection is a line. which geometry term does the statement represent? defined term postulate theorem undefined term

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²