The sum of two numbers is 17 and their difference is 5 what are the two answers

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?

What are the vertical asymptotes of the function f(x) =5x+5/x2 + x-2

Agrain trader buys the following amounts from three suppliers: 3,200 pounds, 5,100 pounds and 700 pounds. what is the total weight of his purchase?