A layup yard has five tracks with a total capacity of 55 cars. If 8 cars are laid up on one track and 6 cars on each of the other four, how many additional cars can the yard hold?

To find out how many additional cars the layup yard can hold, first calculate the total number of cars currently laid up. There are five tracks in the yard with a total capacity of 55 cars.

On one track, there are 8 cars laid up. On each of the other four tracks, there are 6 cars laid up. So, the total cars laid up on those four tracks is 4 tracks × 6 cars = 24 cars.

Now, add the cars from the one track with 8 cars: 8 cars + 24 cars = 32 cars currently laid up in the yard.

Next, to find out how many additional cars the yard can hold, subtract the current number of cars from the total capacity: 55 cars (total capacity) - 32 cars (currently laid up) = 23 cars.

Therefore, the yard can hold an additional 23 cars. This is why the correct answer is indicated as 23 cars.