which phrase describes an unknown or changeable quantity?

Answer:2 o’clock in the afternoon
Step-by-step explanation:
The time is constantly changing where as 4 quarts will always be a gallon, 3 feet and 7 inches will always be the same length, and the height of that buildingx1/2 will come to the same number.
Answer: The height of the building times 1/2
Step-by-step explanation:
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