The expression will be 20°F - (-12°F)
From the information given, the highest and lowest temperature are represented below:
Highest temperature = 20°F
Lowest temperature = -12°F
Therefore, the difference between the highest and the lowest temperature will be:
= Highest temperature - Lowest temperature
= 20°F - (-12°F)
= 20°F + 12°F
= 32°F
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