Need Help on this math problem. Thank you

Question

A water tank has a leak. Each hour it loses 5 liters of water.

Determine which of these statements can be used to find the water the tank lost over time.

Answer Choices

A. Let w=5×t where w represents water lost and 5×t represents the product of the rate per hour and the amount of time for which water is lost.


B. Let w=5+t where w represents water lost and 5+t represents the sum of the rate of loosing water and amount of time .


C. Let w=5−t where w represents water lost and 5−t represents the amount of time .


D. Let w=5÷t where w represents water lost and 5÷t represents the rate per hour.

Answer 1

Try substituting.  Since the tank loses 5 liters each hour, substitute 1 for t in each equation.  Which ones give you 5 for w?  Now substitute 2 for t.  In 2 hours the tank will lose 10 liters (5+5), so which equation gives you 10 for w?  Now you have your answer.