Y = -1.33 * x - 3
y = -1.33 -3 *x
y = -4.33 *x
        
                    
             
        
        
        
16 cm.
This is because one side of the hexagon is half of one side of the square. Therefore, you multiply 8 by 2. 8x2 = 16
        
             
        
        
        
First, let x or any variable represent the number of paintings Kate initially has. After selling 12 of it, her paintings now becomes only x - 12. Then, she purchased 7 more making the number of her paintings become x - 12 + 7 = x - 5. This number tantamount to 21. 
                                           x - 5 = 21      ; x = 26
Thus, Kate initially had 26 paintings. 
        
             
        
        
        
21 students because if 6 represents 30% u add 6 two more time which equals 18 and 90% then u add 3 more because it is half of 6. when u add 3 more u will get 21 and 100%