Answer:
slope = -1
Step-by-step explanation:
parallel lines have the same slope,
y = -x – 4
=> y = -1(x) -4
           ↑ slope
y = mx + b
      ↑ slope
 
        
             
        
        
        
The answer is x=20.  Hope this helps.
        
             
        
        
        
First do 48.50-21 then divide that amount by 5. Then that’s how much each pair of socks cost so 
48.50-21=27.50 
27.50%5=$5.50 so rx=$5.50
        
                    
             
        
        
        
Answer:
42 is an area
Step-by-step explanation: