Answer:
84
Step-by-step explanation:
68 + 100 = 168
168/2 = 84
C is your answer.
Without calculating anything else, you can look at the minimum and maximum values in your data set of 6 and 35. C is the only one that has those correct.
Just make sure that the numbers are in order before you analyze.
8.102, 8.12, 8.1212, 8.2
Hope this helps!
Combine like terms the variables first. 4b-15b=-11b
-7+3=-4
-11b-4