Question

500 gallons of water is being drained at a rate of 4 gallons per hour, If y is the number os gallons of water in the tank after being drained for x hours, which equation represents the situation?

Answer 1

The correct equation would be y = 4x - 500.

Explanation:

y = The number of gallons in the tank after being drained for x hours

x = The number of hours that the tank is being drained

500 = The number of gallons in the tank

4 gallons = the number of gallons that are being drained per hour

y = 4x - 500

Correct answer: 0 = 4 (125) - 500

500 / 4 = 125

Answer 2

4x + y = 500

Explanation:

Given:

Volume of water = 500 gallons

Water drained rate = 4 gallon per hour

Find:

Equation

Computation:

Total volume of water left in tank = y

Number of hour water drained = x

So,

Volume of water - Total volume of water left in tank = Water drained rate[Number of hour water drained]

500 - y = 4x

So,

Water drained;

4x + y = 500