For this case, what you should see is which lines contain point O.
 We have then that the lines that contain this point are:
 EC
 AD
 BO
 We note that three lines contain point O.
 Therefore, three lines intersect at the same point.
 Answer: 
 4. 3
        
                    
             
        
        
        
Answer:
D
Step-by-step explanation:
2y=10x
Divide both sides by 2.
y=5x
Now substitute this into the second equation.
 
        
                    
             
        
        
        
Answer: bd=8 dc=2 and ae=4 so value of ab=16
Step-by-step explanation:
 
        
             
        
        
        
Answer:
The 3rd one, The 1st one and The last one.
Step-by-step explanation: