An estimate for the number of ducks would be 62.
There were 30 the first day.
The second day, 8 of those 30 were there as well, so we subtract that from the 40 ducks and get 32.
Add 30 and 32 to get our estimate.
Based on the picture I would say:
-4 + -2 = -6
Answer:

Step-by-step explanation:

Dividing both sides by -7.


There is only one solution that satisfies the equation.