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UncleCeyth
Middle School
PLEASE HELP
In the middle of the afternoon, the temperature outside was 0 °F. An hour later, the temperature had decreased by 12 °F. An hour after that, the temperature had decreased by another 4 °F. What increase in temperature is needed to return to the original temperature of 0 °F?
A
4 °F
B
8 °F
C
12 °F
D
16 °
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DarcySea
Answer:
D. 16 °F
Step-by-step explanation:
Given:
The initial temperature of the outside is 0 °F.
Decrease in the temperature in the first hour = 12 °F
Therefore, temperature after 1 hour = 0 - 12 = -12 °F
Now, decrease in the temperature in the second hour = 4 °F
Therefore, temperature after 2 hours = -12 - 4 = -16 °F
Let 'x' °F be added to the final temperature in order to bring it to 0 °F.
Therefore,
Adding 16 on both sides, we get:
Hence, we need to increase the temperature by 16 °F to attain the same initial temperature of 0 °F.
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