I need your help if the airplane was at altitude of 800 feet above sea level. It landed at airport 45 feet below sea level. Which is the highest level?

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?

How many solutions does the nonlinear system of equations graphed bellow have?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36