Hi! i think it’s d, just by process of elimination!! it cant be any of the others, and d estimates to be right.
        
             
        
        
        
Answer:
)Alex picks more red cards than black cards, 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
6x+21 (Maybe)
Are you doing the buddy method, how is your teacher wanting to do this, When you respond I might have the correct answer
(buddy method) Multiply the 2x and 7 by the 3 giving you 6x+21 and then that's it you cant do anything else but I don't know if that's how you're teacher wants it done.
 
        
                    
             
        
        
        
Answer:
<h2>The triangle is not right triangle</h2>
 
Step-by-step explanation:
The steps in the above photo 
I hope that is useful for you :)