A pizza delivery worker purchased a used motor scooter that had been driven 12,100 miles. He drives the motor scooter only on days he is working, during which he drives an average of 50 miles per day. After d days of pizza delivery, the motor scooter has been driven a total of 25,000 miles. Which of the following equations best models this situation?

Sir or Madam, uh ... can't answer your question

Step-by-step explanation:

"Which of the following equations best models this situation?"

What does this mean, you don't give us any answer choices!

I know there's no equations given but maybe this could work.

Possible answer: (25,000 - 12,100) / 50 = d

25,000 (end amount of miles)

subtracted by 12,100 (before added miles)

This will give you the amount the worker drove.

Since there's no known amount of days the worker has delivered, you want to divide.

The difference of the two would be divided by the 50 miles to find the amount of days.

So I think the best equation would be

(25,000 - 12,100) / 50 = d