Art's swimming pool contains 20,000 gallons of water. He drains the pool at a rate of 5 gallons per minute. Write the equation that represents the number of gallons of water, y, remaining in the pool after x minutes.

The answer is the third choice

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post