I answered all of them for you.
2) 16 - 27 = (-11) So, the final temperature was negative 11 degrees, or -11 degrees.
3) The average is the same thing as the mean. You calculate the mean by adding all the numbers up, and dividing them by how many numbers there are.
1 + 16 + 21 + (-4) + 22 + (-2) + 7 = 61; 61 / 7 = 8.71 (rounded to nearest decimal place).
4) (-42) - 7 = (-49). So the temperature the second day was -49 degrees.
5) 93 - 9 = 84. temperature the day before was 84 degrees.
Hope this all helps, have a wonderful evening.
