A plane begins flying due east from an airport at the same time as a helicopter begins flying due north from the airport. After half an hour, the plane and helicopter are 260 mi apart, and the plane is five times the distance from the airport as the helicopter.
What would be the equation that can be used to determine d
if d is the distance flown by the chopper, then
d^2 + (5d)^2 = 260^2