Answer:
15
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
42 
Step-by-step explanation:
because it took 7 tubes of red for one painting and when she does 6 you would multiply 6x7 and it would equal 42.
 
        
             
        
        
        
The answer is d which is 6/5
        
             
        
        
        
3u + 4u + 2u = 9u 
9u = 90
1u = 90/9 = 10
since black is 2u ( from the ratio given)
2u = 10 x 2 = 20
Answer : 20cm of the pole is painted black.
The bar diagram is in the picture :)