Aproblem states that ursala earns $9 per hour to write an expression that tells how much money ursala earns for h hours joshua wrote 9 over h sarah wrote 9h whose expression is correct and why

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?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Which of the binomials below is a factor of this trinominal? x^2-13+30