Answer: x = 9/4 = 2.25 minutes
Step-by-step explanation: To find out how many minutes it will take to pump 3/4 of a gallon when the pump is pumping 1/3 of a gallon every minute, you can use a simple proportion:
(1/3 gallon) / (1 minute) = (3/4 gallon) / (x minutes)
Now, you can cross-multiply and solve for x:
(1/3) * x = (3/4)
To solve for x, multiply both sides by 3:
x = (3/4) * (3/1)
x = 9/4
So, it will take 9/4 minutes to pump 3/4 of a gallon. To express this as a decimal, divide 9 by 4:
x = 9/4 = 2.25 minutes
Therefore, it will take 2.25 minutes to pump 3/4 of a gallon.