Answer: the answer is 4
Step-by-step explanation:
This is because to find the average you have to add all the digits together and then divide by how many digits there are so
20+14+9+8=51 now adding a negative number is the same as subtracting a positive so 51-8= 43-11= 32-4= 28 now that we know the sum of all the digits is 28 we divide by how many digits there where and there was 7 digits one for each day so 28/7=4 so you have your answer
