Question

Which expression can be used to determine the volume of water in a rain barrel after d days if there were 198.6 gallons of water in the barrel and 12.2 gallons are used each day

Answer 1

Explanation:

x = days y= amount of water in barrel

- 12.2 x = water used in 'x' days

subtract this from the water already in the barrel to get

y = 198.6 - 12.2x gallons