Answer:
D
Explanation:
$2.50 is the initial charge, so it's not affected by the amount of miles of the trip, therefore the x, which represents miles, would not be next to $2.50. This eliminates A
x has no relation to 2.50 so it wouldn't be in parentheses together, that eliminates B
You have to add 2.50 to the total, not subtract it from the total. That eliminates C
By process of elimination we end up with the answer being D