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 November 17th, 2006, 03:13 PM #1 Member   Joined: Nov 2006 From: BIG APPLE Posts: 63 Thanks: 0 HALF RIGHTT Solve the system of equations by graphing: y = 5x - 7 and y - 5x = 8 ok for this my answer came out to be half right...help please this is what i did: y - 5(0) = 8 y - 0 = 8 y = 8 points> (0,8 ) 7 - 5(1) = 8 y - 5 = 8 add 5 y = 13 points> (1,3) y = 5(0) - 7 7 = -7 points>(0,-7) y = 5(1) - 7 y = 5 - 7 y = -2 points>(1,-2) now what why did i get half right? and then i graphed teh points
 November 25th, 2006, 05:57 AM #2 Newbie   Joined: Nov 2006 From: Dhaka, Bangladesh Posts: 2 Thanks: 0 y = 5x - 7 and y - 5x = 8 these two equations has no solutions. if you graph them, you'll see that they are parallel lines and don't intersect at any point. and so the equations you mentions don't have any solutions. the first equation is y = 5x - 7 y - 5x = -7...................(1) the second equation is y - 5x = 8....................(2) comparing (1) and (2), we get, -7 = 8 which is absurd. thats why. the equations don;t have any solutions.
 November 27th, 2006, 08:12 AM #3 Member   Joined: Nov 2006 From: BIG APPLE Posts: 63 Thanks: 0 thanks took too long i already had the asnwer already gave it in but thanks
 December 5th, 2006, 04:23 AM #4 Senior Member   Joined: Dec 2006 Posts: 1,111 Thanks: 0 In general, in graphing exercises, if you get weird results and everything else looks fine, you are probably facing parallel lines, degenerate conics, or something like that.

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