1. Warm ups

2. Work Problems Objective: To solve work problems involving rational expressions.

3. Use this formula:

4. Work Notes Paper Let’s do the 2 problems on your notes paper together.

5. Problem 1(on notes paper) It would take Nora 3 h to chop down a tree in front of her house. Her younger brother would need 6 h to do the same job. How much time would it take them if they worked together?

6. Problem 2 3) Working alone, Danielle can sweep a porch in 13 minutes. Gariella can sweep the same porch in 15 minutes. Find how long it would take them if they worked together.

7. Problem 3 4) It takes Kali 12 minutes to sweep a porch. James can sweep the same porch in 13 minutes. Find how long it would take them if they worked together.

8. Problem 4 5) It takes Daniel 15 hours to pick forty bushels of apples. Shawna can pick the same amount in 11 hours. If they worked together, how long would it take them?

9. Problem 5 (on notes paper) Working alone, Sean can cultivate a field in 6 h. If his brother Ian helps him, it will only take 3.5 h to cultivate the field. How long will it take Ian to do the job alone?

10. Example 6 Working together, Michelle and Dana can pick forty bushels of apples in 7 hours. Had she done it alone it would have taken Michelle 15 hours. Find how long it would take Dana to do it alone.

11. Problem 7 Working together, Erica and Tracy can tar a roof in 5 hours. Had she done it alone, it would have taken Erica 11 hours. How long would it take Tracy to do it alone?

12. Problem 8 Working together, Serene and Summer can plant flowers in 6 minutes. Had she done it alone it would have taken Summer 10 minutes. Find how long it would take Serene to do it alone?

13. Homework Worksheet: ▫Work Problems Worksheet #1