Ronaldo has five times blancas amount 
Juan has twice the amount
Plus blancas one times her amount that is 8 time blances amount. If Blanca has 1/8 of 500 then Juan has 1/4 and 1/4 of 500 is 125
        
             
        
        
        
Hello!
She placed 6 ribbons
2 at the ends and 5 every 3 meters
        
             
        
        
        
8 because when you flip one coin there is 2 outcomes: heads and tails. Therefore if you flip 3 of them it is 2*2*2=8
        
             
        
        
        
The partial products are: 42 x 28 = (40 + 2) x (20 + 8) = 40 x 20 + 40 x 8 + 2 x 20 + 2 x 8 
= 800 + 320 + 40 + 16 Hope this helped.