Two times the sum of a number and 18 is at most -17

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

Pls! does anybody know a shortcut for answering these types of questions in the future?

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes