Question

9.The temperature on a certain morning is -11℃ at 5 a. m. If the temperature drops 3 degree at 6 a.m. and rises 5 degree at 8 a.m. and again drops 3 degree at 9 a.m. What is the temperature at 9 a.m.?
(1 Point)​

Answer 1

Answer: -7ºC

Initial temperature = -11ºC

Then it decreased by 3 degree.

then it increased by 5 degree.

Then it is decreased by 3 degree.

Then it must increase by 5 degree.

Final temperature = -11 -3 +5 -3 +5

                              = -7ºC

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Answer 2

Answer:

-12°C

Step-by-step explanation:

We know that Temperature at Morning 5a.m was -11°C

Now, at 6 a.m its drops by 3°C,

So, now the temperature is -11 - 3 = -14°C

Now, at 8 a.m it rises by 5°C,

So, now the temperature is -14 + 5 = -9°C

Now, at 9 a.m it drops by 3°C

so, now the temperature is -9 - 3 = -12°C

Thus, the temperature at 9 a.m is -12°C

We can do it in another easily method,

we know that the temperature was initially -11°C, and then drops by 3°C, rises by 5°C and again drops by 3°C

So, the final temperature = -11 - 3 + 5 - 3 = -12°C

Hope it helped and you understood it........All the best