Answer:
a: 
Step-by-step explanation:



 
        
                    
             
        
        
        
I got 1:4 
What I did was added all the catfish samples which was 15. Then I added all the samples together and got 60. I then put them in the ratio and simplified them.
15:60
1:4
 
        
                    
             
        
        
        
Factorial is the correct answer because in combinations the order does not matter
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
y + 5 = -2(x + 3)
y + 5 = -2x - 6
y = -2x - 11