Answer: 
j=10.8
Step-by-step explanation:
First, you want to get rid of that 1, so to do that, you add 1 to each side, so you have j/4=2.7. Next, to get rid of the division, you need to multiply by 4 instead, so if you multiply each side by 4 to cancel out the division, you're left with j=10.8
 
        
             
        
        
        
Answer:
39.9km a day
Step-by-step explanation:
Add up the four kilometers cycled and you should get 159.6km cycled in total.  Divide that number by 4 to get 39.9km as a result.  So she's wrong.
 
        
                    
             
        
        
        
12= -12
-1/2= 1/2
.25 =-.25
-27=27
0=0
        
             
        
        
        
Tenth: 243.9
hundreth: 243.88
ten: 240
hundred:200
hope this helps
        
             
        
        
        
Answer: 18
Step-by-step explanation: