Answer:
Explanation:
I did this quickly so you'd get an answer so appologies for any errors.
1. The change from 7 gallons to 5 is -2/3 or -.667 a minute because it decreases 2 gallons in 3 minutes.
2. 5 gal = (2/3 gal/min)(x minutes)
x = 5(3/2) = 15/2 = 7.5 minutes to drain the remaining 5 gallons.
3. There was 10 gallons when the tank is full
That is 3 gallons more than the 7 gals there when Jada arrived.
(2/3)(x) = 3
x = 3(3/2) = 9/2 = 4 1/2 minutes
4 1/2 minutes before Jada arrived