Ross has to fill up a 300 gallon tank. There are already 75
gallons of water in the tank, and the pump Ross uses can fill
25 gallons of water per hour. How many hours does he need
to finish the task?
hours

He needs 9 hours  to finish the task.

Step-by-step explanation:

Hi, first we have to subtract the gallons of water already in the tank (75) to the total capacity of the tank (300).

300-75 = 225

He needs to fill 225 gallons.

Since the pump Ross uses can fill 25 gallons of water per hour, the proportion is :

25 g / 1h

For 225 gallons:

225 g / x hours  

Solving for x

25/1 = 225/x

x= 225/ (25/1)

x = 9 hours

thats not a system of equations, that is a solution

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: