Answer: y= -x + 7 
Solution:
Step 1 : find the slope using the equation using the pair of coordinates that are given i.e A (−7,14)  B (−21,28) ( name them A and B respectively so they can be easily named as x1, y1 and x2,y2 respectively)
m = y2-y1/x2-x1
m = 28-14 / -21 -( -7)
m =  14 / -14
m = -1 
Step 2 : Find the y intercept using the line of equation (use and one of the given coordinates either A or B)
Using A ( -7, 14)
y= mx+ b 
14 = (-1)(-7) + b
14= 7 + b
14-7 = b
7 =b
So,
y=mx+b
Insert m and b
y= -x + 7
 
        
             
        
        
        
Each Person Pays $6.95 ! 
83.40/12=6.95
        
                    
             
        
        
        
Answer: 8 weeks
Step-by-step explanation:
20 - 4 = 16
16 / 2 = 8
 
        
                    
             
        
        
        
Answer:3218680
 cms
Step-by-step explanation: multiply 20x160934