Guys Please help I have no idea what the answer is

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?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter