For number one the second card must be positive or he would have to put it back if its negative for number 2 the card must be 3 4 5 because negative 2 plus 3 is 1 which is positive and negative 2 plus 4 and 5 would allow her to keep her cards. for the third one danny could have pulled a negaitive 1 2 3 4 and 5. oh dude i forgot to put decimals but still the same thing
        
             
        
        
        
Step-by-step explanation:
 is similar to
 is similar to  so we can write the ratio
 so we can write the ratio

Solving for x, we get

 
        
             
        
        
        
That has to be impossible because you can’t get any solution that would possible add to 6