Answer:
Each hiker carried the backpack for 1/5 of the total trail distance
Step-by-step explanation:
Three members of a teen hiking group hiked 3/5  of the entire Appalachian trail, each teen carried the backpack the same distance
=>  each teen carried the backpack for = (1/3) (3/5)  of total Distance = 1/5  
 
        
             
        
        
        
-4 (x - 5) + 3 (a - 7)
First, expand your problem. / Your problem should look like: -4x + 20 + 3a - 21
Second, simplify. / Your problem should look like: -4x + 3a - 1
Answer: -4x + 3a - 1 (C)
        
                    
             
        
        
        
Answer:
a letter
Step-by-step explanation: