1. 1,2,3,6 2. 1,3,9 3. 1,2,5,10 4. 1,2,3,4,6,12 5. 1,3,7,21 6. 1,2,3,6,9,18 7. 8,16 8. 1,5,25 9. 1,31 10. 3x3 11. 5x5 12. 2x2x2 13. 14 is a composite number 14. 2x2x2 15. 3x5 16. 5 is a prime number 17. 20 is a composite number 18. 2x13
First turn 1/2 to 2/4 so you have a common denominator. Next turn the mixed numbers into improper fractions: 11 3/4 --> 47/4 and 8 2/4 --> 34/4 Subtract: 47/4 - 34/4 = 13/4 Divide: 13/4 = 3.25 3.25/2 --> 1.625 or 1 5/8 Therefore, he will have to place it 1 5/8 feet from each side
When using proportions to solve for unknown quantities, you need to keep the same units on the same side. This means keep "ft" on the top side and "mi" on the bottom side.
