Answer:
4. 4m+6h≤40       5. 20m+40h≥200      6. a. 4=m  4=h   b. 5=m  3=h
Step-by-step explanation:
4. Since you know that she can't work more than 40 hours a week and you also know that it takes her 4 hours to mow a lawn and 6 hours to clean a house. This is added together to make the inaquality above.