Answer:
2.8571428571429
Step-by-step explanation:
8n - 3.9
Given
- (- 8n + 3.9 ) ← multiply each term in the parenthesis by - 1
= 8n - 3.9
7-(-4)= Positive
-3+(-2)= Negative
5-8= Negative
-10 +12= Positive
C
tanA = = = = → C
