My guess would be guess A
        
                    
             
        
        
        
Answer:
-x+2
Step-by-step explanation:
3x+(2−4x) 
=3x+2-4x
=3x-4x+2
=-x+2
I hope this helps!
 
        
                    
             
        
        
        
Answer:
3 gallons
Step-by-step explanation:
Let
x ----> the amount of pure acid (100% solution) in gallons
Remember that



we know that

solve for x


therefore
3 gallons of pure acid should be mixed with 3 gallons of a 20% acid solution in  order to get a 60% acid solution
 
        
             
        
        
        
You first separate the triangle from the rectangle. Then multiply one side be one side. 
        
             
        
        
        
Answer:
A) rational number
Step-by-step explanation:
56 is a rational number because it can be expressed as the quotient of two integers like 56 ÷ 1.