Johann and marta shopped at a vintage toy store johann bought 3 blue marbles and 5 green marbles and paid 11 dollars marta bought 4 blue marbles and 2 green marbles and paid 10 dollars which system of equations can be used to find the prices of the blue and green marbles

This isn't better than the last time you were warned.

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm