Answer:
1. She was so self-motivated that she was named to the all-star team six times.
2. Twenty-four tutors worked in the Writing Center; two-thirds of them were women.
3. He grew up with the idea of a dog-eat-dog world and slowly developed an anything-goes attitude toward life.
Step-by-step explanation:
1. She was so self motivated that she was named to the all star team six times.
2. Twenty four tutors worked in the Writing Center; two thirds of them were women.
3. He grew up with the idea of a dog eat dog world and slowly developed an anything goes attitude toward life.
The bold above sentence's is where we needed to add hyphens.