1 answer:
            
              
              
                
                
 
a. f(a) =5a+12
we have 1. a=6
Therefore, where ever we find a we'll substitute in 6
f(6) =5(6) +12
6f=30+12
6f=42
so therefore 1. a=6 will match c on the right
2. a=2
f(2) =5(2) +12
2f = 10+12
2f = 22
therefore 2. a=2 will match a on the right
3. a=4
f(4) =5(4) +12
4f=20+12
4f=32
therefore 3. a=4 will match d on the right
4. a=5
f(5) =5(5) +12
5f=25+12
5f=37
therefore 4. a=5 will match b on the right
 
 
                                
             
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true 
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i hope that helped you
 
        
             
        
        
        
5x^2 + 6x +13.88 is what is is simplified hope it helped a bit 
        
                    
             
        
        
        
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Lo siento pero tengo que hacer una pregunta urgente.