Answer:
they drink 1.667 gallons a week. it takes about 6.5 days to drink a whole gallon
Step-by-step explanation:
take 10/6 to get 1.667 then how many days would it take to drink 1 whole gallon
we have
5x+4=2x+9
5x-2x=9+4
3x=13
x=13/3
The answer is A.16
2.5/0.4= 6.25
100/6.25= 16