A rule to calculate the fare, in dollars (${\char"24}$), for a taxi journey is:
Multiply the distance in miles by 2.42.42.4 then add ,555
The distance of a taxi journey is 15 miles.
Work out the fare, in dollars (${\char"24}$), for this journey.
The fare for a different taxi journey is $19.40{\char"24}19.40$19.40.
Work out the distance, in miles, of this journey.
