The third one is the correct answer
Answer:
I would solve this as Simplify the matrix.
Step-by-step explanation:
I would do 5+9
Then i would do 16+2
Then the 4 would be by it self
14=18=4
Then if you need to solve it more then i would just add 14 18 and 4 together
N=10
3n-8=32-n
+8 +8
3n=40-n
+n +n
4n=40
Divide
n=10
Answer:
AB ≈ 35.93
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos3.5° =
=
= 
Multiply both sides by 36
36 × cos3.5° = AB, thus
AB ≈ 35.93 ( to 2 dec. places)