Each of the first 4 pit stops a race car driver makes loses ten seconds off the leader. The pit crew makes adjustments, and at each of the next two pit stops he gains 7 seconds on the leader. How much time is the driver off the leader? show work

A. - 40 seconds

B. 14 seconds

C.-26 seconds

D. - 54 seconds

First off we start by the four first pit stops.

Begin at 0 seconds, then subtract 10 seconds from 0 seconds every pit stop.

Stop 1: 0-10 = - 10 seconds

Stop 2: - 10-10 = - 20 seconds

Stop 3: - 20-10=-30 seconds

Stop 4: - 30-10 = - 40 seconds

Now we are - 40 seconds from the leader. Since the pit crew has made adjustments for the next two stops, we add 7 seconds.

Stop 5: - 40+7 = - 33 seconds

Stop 6: - 33+7 = - 26 Seconds from leader.

The answer is C) - 26 seconds