Answer:
B : -2
Step-by-step explanation:

Just do a line crossing another in a angle of 90°
1 is linear pair with 2, 2 is linear pair with 3, 3 is linear pair with 4 and 4 is linear pair with 1.
What is the commutative property of multiplication?
Answer:
1
Step-by-step explanation:
Step 1:
5 + ( - 2 ) + ( - 5 ) + ( - 3 ) + 1 + 5 Equation
Step 2:
5 - 2 - 5 - 3 + 1 + 5 Open parenthesis
Step 3:
5 - 10 + 1 + 5 Subtract
Step 4:
- 5 + 1 + 5 Subtract
Answer:
1 Add and Subtract
Hope This Helps :)