Answer:
90 because i took this before and i know
 
        
             
        
        
        
Step-by-step explanation:
The exterior angle is the sum of the opposite interior angles of the triangle.
Therefore, m<D +m<C = 118°
 
 => 8y+3 +3y+5 = 118°
 => 11y = 118° - 8°
 => 11 y = 110°
 => y = 10°
m<D = 8y+3
 = 8(10)+3 = 83°
m<C= 3(10)+5 = 35°
m<DEC = 180° -118° = 62°
 
 
 
        
             
        
        
        
Answer:
3(x-4)
Step-by-step explanation:
3×4=12 and 3 also goes into 3x
 
        
             
        
        
        
The question is asking us to find the sum. To do this, let's first write the original equation and then take it from there.

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Use distributive property:
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Combine Like Terms:

Therefore, the answer to your question is 
-4x² + 3x + 4. Hope this helps and have a fantastic day!