Answer:
56.3°
Step-by-step explanation:
If the total is 107.3° just subtract 51° to get 56.3°
 
        
             
        
        
        
3.8 is the answer you already figured it out
        
             
        
        
        
Answer:
m<FED=60, m<DEN=120
Step-by-step explanation:
m<FED=60
This is because <GEN and <FED are vertical angles.
Vertical angles are always congruent.
Vertical angles are formed by a pair of intersecting lines, and are the angles directly across from one another.
m<DEN=120
This is because <DEN and <GEN are supplementary.
Supplementary angles add up to 180 degrees. 
We know this because a straight line is always 180 degrees.
So:
m<DEN+m<GEN=180
m<DEN+60=180
m<DEN=120
 
        
             
        
        
        
Answer:
0.5 < x < 16.5
Step-by-step explanation:
8.5 - 8.0 < x < 8.5 + 8.0 =
0.5 < x < 16.5
<em>Hope that helps! :)</em>
<em></em>
<em>-Aphrodite</em>