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.


Tags 
half, rightt 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Upper halfplane to lower halfplane  lime  Complex Analysis  2  July 2nd, 2011 09:51 PM 
Half life of N2?  usyer  Physics  3  June 4th, 2011 05:47 PM 
Happy Half Tau Day!!!!!!!  The Chaz  New Users  1  March 14th, 2011 08:16 AM 
HalfLife  jerakahol  Algebra  10  January 10th, 2011 03:27 PM 
Half life  Mustangguy93  Calculus  1  October 11th, 2009 02:56 PM 