Question

The mean temperature for the first 4 days in January was 7°C.
The mean temperature for the first 5 days in January was 9°C.
What was the temperature on the 5th day?

Answer 1

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Explanation 1

Answer:

-1°C

Step-by-step explanation:

Now we are given the mean temperature for the first 4 days in January was 9°C

So, Now we are given that  the mean temperature for the first 5 days in January was 7°C

So, Temperature on 5th day = Sum of temperatures of first 5 days -Sum of temperatures of first 4 days

Temperature on 5th day = 35°C-36°C = -1°C

Hence the temperature on the 5th day was -1°C

Explanation 2

Ok to make this easy, do 4 days as 9°C. So 9+9+9+9=36 / 4 = 9. So that's the first 4 days. Then the 5th day, the mean dropped to 7°C so that means the temperature dropped. -1 is your answer and you can check this by doing 9+9+9+9+(-1) = 35 / 5 = 7°C.

Answer 2

Answer:

answer:

a) 35

step-by-step explanation:

5 + [5 × (4 + 2)]

start with the inner most parentheses

5 + [5 × (6)]

then the next set of parentheses

5+ 30

then we can add

35

hope it helps you...