The 6: 00 am temperatures for four consecutive days in the town of lincoln were -12.1 c, -7.8c, -14.3 c, and -7.2c. what was the average 6: 00 am temperature for the four days

To find the average you have to add all the numbers up together, and then divide the sum of those number by how many numbers there were.
1) -12.1+-7.8+-14.3+-7.2= -41.4
2) -41.4/4 = -10.35 
3) Final Answer= -10.35 C