Answer:
Step-by-step explanation:
Given
New mail carrier takes 4 hours for delivery i.e.
New mail carrier completes part of work in 1 hour
Old mail carrier takes 3 hours for delivery i.e.
mail carrier completes part of work in 1 hour
If they work together, they complete the work in x hours i.e.
Answer:
what?
Step-by-step explanation:
Step-by-step explanation:
Numbers: 330, 440, 550, 660 and so on all the way to 990