With a headwind, a plane traveled 390 mi in 1.5 h. let x represent the plane’s speed (excluding wind speed) and let y represent the wind speed in miles per hour.
which equation models this situation?
390 = 1.5x – 1.5y
390 = 1.5x – y
390 = 1.5x + 1.5y
390 = 1.5x + y

With a headwind, a plane traveled 390 mi in 1.5 h. Let x represent the plane’s speed (excluding wind speed) and let y represent the wind speed in milesper hour. 

Which equation models this situation? 

390 = 1.5x – 1.5y
390 = 1.5x – y
390 = 1.5x + 1.5y
390 = 1.5x + y
lastoneistheanswer.