Answer:
[tex]8.875\°C[/tex]
Step-by-step explanation:
Let
x ----> the mean temperature for the first 8 days in January
we know that
The mean temperature for the first 7 days in January multiplied by 7 is equal to the sum of the temperatures for the first 7 days
9(7)=63°C
so
The sum of the temperatures for the first 7 days plus the temperature on the 8th day, all divided by 8 is equal to the mean temperature for the first 8 days in January
[tex]x=\frac{63+8}{8}=8.875\°C[/tex]
