Synthetic division: a jet flies 400 mph 
A jet flies to the west for a distance of approximately 830 miles,
  starting at Point A and ending at Point B. The jet is moving at 400
  mph, on average. A strong wind comes from the north at 40 mph. In
  minutes, how long would it take for the jet to reach its final
  destination at Point B?

I'm not quite sure why I'm having issues with this question. I think it might have to do with the part with the wind, unless it's as deceptively simple as doing synthetic division with 400/830? 

The plane's overall speed is $400$ mph. 

Hint: Using the Pythagorean Theorem, if the plane's westward speed is $v$,
  we know that $v^2+40^2=400^2$

We also know that the plane has to travel $830$ miles WEST. 
