Katrina drinks 0.5 gallons of water per day. which expression shows how to find the number of cups of water she drinks in a week

The expression is as follows: x = 8y

Explanation:

1 gallon is 16 cups, therefore 0.5 gallons is 8 cups. If we denote x as the cups of water and "y" are the days, therefore, the equation is:

x = 8y

If y = 7, which is 7 days a week, therefore, the number of water rates you drink will be equal to:

x = 8x7 = 56 cups

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