Answer:
12 - 12
Explanation:
If the temperature was originally 12°C it decreases by 12° then 12 - 12.
From 12:00 midnight to 6:00 am, the temperature decreased by 12°C. If the original temperature was 12°C.
Question: Which expression can be used to represent this situation?
12:00 midnight temperature = 12 °C.
6:00 am temperature decreased by 12 °C.
So 12 - 12.
Hope this helps (sorry if I'm wrong)