Answer:
The correct option is C ) 109.5°
Therefore,

Step-by-step explanation:
Given:
In Triangle DEF
d = 10
e = 18
f = 12
To Find
angle E = ?
Solution:
In Triangle DEF , Cosine Rule says

Substituting the values we get


Therefore,

............As it is in Second Quadrant
Therefore,

Z=-3 is the correct answer. Use math papa if you need help with the steps on how we got z=-3
Answer:
B.) $58
Step-by-step explanation:
350-89-18-27-38-120 = 58