Answer:
Step-by-step explanation:
1. no-has decimal
2. yes, simplifies to -2
3. yes
4. yes
5. no-2.1
Answer:
C. 
Step-by-step explanation:
We have been given a triangle. We are asked to find the measure of angle Z using Law of cosines.
Law of cosines:
, where, a, b and c are sides opposite to angles A, B and C respectively.
Upon substituting our given values in law of cosines, we will get:








Now, we will use inverse cosine or arc-cos to solve for angle Z as:



Therefore, the measure of angle Z is approximately 51 degrees.
Hiiiiiiiiiiiiiiiiiiiiiiiii
Answer:
the third slide CRACKED me up XDDD
Step-by-step explanation: