X+y=0 3x−2y=10 which of the following ordered pairs (x, y) satisfies the system of equations above?

Try this option (it is only one way): note, that (1) means 2(x+y)=0*2, (2) means 2x+2y+3x-2y=10.answer: (2; -2)

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

Hope this ; )