Answer:
First find out the how many gallons of water does it use each hour .
To prove
As given
An ice machine uses 3 gallons of water every 9 hours.
3 gallons of water = 9 hours
Water uses by ice machine in one hours = 0.33 gallons (Approx)
Now find out how many hours does it take to use one gallon .
As given
An ice machine uses 3 gallons of water every 9 hours.
3 gallons of water = 9 hours
Hours take by ice machine to use one gallons of water = 3 hours.
Answer: John runs 5 m/s
Step-by-step explanation: Divide 100 by 20 and you get 5.
Also you are dividing the meters he runs by the seconds he runs.
y = x2 - 8x + 19