Final answer:
The equation that represents how much you pay in total for the month if x is equal to the number of times you go to the gym is Total cost = $20 + $2x.
Step-by-step explanation:
The equation that represents how much you pay in total for the month if x is equal to the number of times you go to the gym is:
Total cost = Monthly fee + (Bottled water cost) * (Number of times you go to the gym)
In this case, the monthly fee is $20 and the bottled water cost is $2. Therefore, the equation would be:
Total cost = $20 + $2x
Where x represents the number of times you go to the gym.