Answer:
1. Jonas Jenkins is the president-elect.
2. We found twenty-nine errors in the document.
3. My father has the most up-to-date computer available.
4. Her time-worn excuses are getting old.
5. I anticipate thirty-six guests at the wedding.
6. Two-thirds of the class is home with the flu.
Step-by-step explanation:
Hyphens are used to bring together compound words. These compound words may have been written separately or as a word. They can be used to combine compound numbers as in thirty-six and twenty-nine. They can be used to bring together two adjectives acting as a single word as in time-worn.
They can be used as line breaks and in-between syllables. Hyphens ease understanding and pronunciation of compound words.