In this equation y represents the total gallons of water in the pool the 500 represents the water that goes into the pool in an hour. X represents the number of hours and 3000 represents the water that was already in there.
The answer is 192sq.cm. REASONING: This would be by multiply the length by the height in order to get the area. 12*19 is equal to 192. PLEASE MARK BRAINIEST!! Have a good day!