Answer:
-8 :)
Step-by-step explanation:
Answer:
Step-by-step explanation:
Sum of all angles of triangle = 180
39 + 102 + x = 180
141 + x = 180
Subtract 141 from both sides
x = 180 - 141
x = 39
1 -2 pretty sure thats the one
The additive identity property states that for every number a, you have

You're showing this property when you write
