Question 974005
The swimming pool in Bob’s backyard holds 10 gallons of water. A gallon of water costs d dollars and takes m minutes to come out of the hose. If it takes Bob 5 minutes to fill his swimming pool, which of the following expressions represents the amount of water, in gallons, that was already in the pool before he started to fill it?
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The cost is not relevant.
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5 minutes * 1 gal/min = 5 gallons
10 - 5 = 5 gallons already in this gigantic pool.