okay i found it. thanks alot
Solve the given problems by determinant. Set up appropriate systems of equations. all numbers are accurate to at least two significant digits
A person spent 1.10h in a car going to an airport, 1.95h flying in a jet, and 0.520h in a taxi to reach the final destination. the jet's speed averaged 12.0 times that of the car, which averaged 15.0 km/h more than the taxi. what was the average speed of each if the trip covered 1140km?