The taxi charges $2.10 for every mile along with $0.90 for extra miles. After ridding 13 miles, the fee exceeds the $20 dollars that you brought. After paying the driver, how much of your $20 is left

After paying the driver $6.20 left.

Step-by-step explanation:

This question is incomplete, here is the complete question :

"The taxi charges $2.10 for the first mile and $0.90 for each additional mile. After  riding 13 miles, you decide that the fare is going to be more than the $20 you have with  you. So, you tell the driver to stop and let you out. Then you call a friend and ask your  friend to come and pick you up. After paying the driver, how much of your $20 is left."

The taxi charges $20 for the first mile and $0.90 for each additional miles.

Then the fare for riding x miles = (2.10 + 0.90x)

If x = 13 miles

then total fare = 2.10 + 0.90 × 13

                       = 2.10 + 11.70

                      = 13.8

If I have $20 with me ten after riding 13 miles money left with me

= 20 - 13.80

= $6.20

After paying the driver $6.20 left.

no this is a nonlinear negative