Answer:
300x-200
Step-by-step extplanation:
A round-trip flight means that you travel back and forth to the same place. So, if you have the expression for a one-way flight, you have to multiply it by 2 to get the expression for the round-trip flight:
2(150x-100)
300x-200
The expression that represents the distance for a round-trip flight is 300x-200.
