Five carpenters working at the same rate can finish a school's furniture order in 8 days. what part of the order will one carpenter complete in 4 days?

  of the order.

Step-by-step explanation:

1. You have that number of carpenters decreases from 5 carpenters to 1 carpenter. Therefore, this decreases by the following factor:

2. The number of days decreases from 8 days to 4 days. Then, the factor is:

3. The order is a furniture, therefore, you can solve the problem as following, where is the part of the order completed by one carpenter in 4 days:

8(-10x+3.5y-7)

8×-10x + 8×3.5y + 8×-7

-80x + 28y - 56

therefore

-80x+28y-56 is the correct answer