Answer:
I would need to see the models to answer this question.
Answer:

Step-by-step explanation:

1800 gal converts to 7200 quarts, and divide that by 60 you get 120 quarts of water per second.
Answer: C is correct, 4x=8
Step-by-step explanation:
You will add the two equations...
4x-8=0
Now you need to move the -8 over, which reverses its sign to positive.
4x=8