Answer: -24.8 or 24 4/5
Explanation:
How to find the mean: add up ALL the number you want or need then DIVIDE by how many there are.
So: -28 + -26 + - 13 + -39 + -18 = -124
You are not done though.
You HAVE to divide -124 by 5.
so your mean should be -24.8 degrees feriheit,