An airplane is at an elevation of 35000 ft. when it starts it's descent at a 20 degree angle of depression. what is the direct distance between the airplane and the airport in miles?

Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?