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Tracy K.

asked • 11/15/12

Parallel or Coincident lines

Which of the following pair of equations form parallel lines? and which form coincident lines? Please explain how you can tell which is which.

1. 2x + 2Y = 90 Parallel or Coincident? Why?

   y= 10 - x

2. y + x = 25  Parallel or Coincident? Why?

   2x = 50 - 2y

 

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