Answer:
792 ounces
Step-by-step explanation:
At the time when the containers hold the same amount of water the value of y in the equations is the same, so
Solve the quadratic equation:
Take only the positive solution since x is positive (minutes)
Now, compute the amount of water y by replacing x = 12 in any of the two equations, for example in container A which is easier to calculate
y = 62(12) + 48 = 792
The correct answer is then 792 ounces