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40points for this)The temperature at the end of the day was 64 degrees. The temperature had increased twice during the day, once by 8 degrees and another time by 4 degrees. Which expression shows what the temperature was at the start of the day? 64 – 8 – 4, 64 + 8 – 4,64 – 8 + 4, 78 + 5 + 7

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r3t40
Hi,

[tex]t + 8 + 4 = 64 \\ t = 64 - (8 + 4) \\ t = 64 - 12 = 52 \\ t = 52[/tex]

Out of given expressions you have those would be correct:

64 - 8 - 4

and this one if in brackets...

64 - (8 + 4)

Hope this helps.
r3t40