Answer:
Each dark chocolate tuffle was $6.
Step-by-step explanation:
This question can be solved by a system of equations.
Four white chocolate truffles (W) cost the same as three dark chocolate truffles (D).
So 
The parent bought 3 white chocolate truffles(W) and 6 dark chocolate truffles (D), and spent $49.50.


So






Each dark chocolate tuffle was $6.
 
        
                    
             
        
        
        
The like terms: 5x^3 and x^3
        
             
        
        
        
They used the river for trade, transportation, and agriculture
        
             
        
        
        
Answer: A
Step-by-step explanation: The Answer Would Be A. The Equation Shown Is Both A Relation And A Function.
 
        
                    
             
        
        
        
Answer:
She made $195 in extra money
Step-by-step explanation:
486+254=740
740-545=195