The mean temperature for the first 7 days in January was 6 °C.

The temperature on the 8th day was -3 °C.

What is the mean temperature for the first 8 days in January? please hurry i need the answer real quick thx

Step-by-step explanation:

In order to find the mean temperature for the first 8 days of January, we have to calculate the weighted average.

We have the following data:

- The mean temperature for the first 7 days was 6 °C. this means that we have

with a weight of (7 days)

- The temperature on the 8th day was -3 °C, this means that we have

with a weight of (1 day only)

So we can calculate the mean temperature using the weighted average, so we have:

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