Answer:
The third exterior angle is 
Step-by-step explanation:
Given


Required
The third exterior angle 
The exterior angles of a triangle add up to 360 degrees.
So:

Make
the subject

Substitute known values


I believe the answer is 15 because if you divide 270/18 you get 15 <span />
Answer:
3
Step-by-step explanation:
add up all data values to get the sum count the number of values in your data set divide the sum by the count
Yes and for a. You can just put y=x [y=1x is bascually the same but just the 1 isnt needed]