Comments on: Mr Riedel’s Year 12 class – Straight Lines http://www.shsmaths.com/2007/11/mr-riedels-year-12-class-straight-lines/ Tue, 07 Feb 2012 21:11:26 +0000 hourly 1 http://wordpress.org/?v=3.0.4 By: Mr Riedel http://www.shsmaths.com/2007/11/mr-riedels-year-12-class-straight-lines/comment-page-1/#comment-2125 Mr Riedel Fri, 09 Nov 2007 08:02:14 +0000 http://shsmaths.wordpress.com/2007/11/02/mr-riedels-year-12-class-straight-lines/#comment-2125 Claire, Q8 b) To find the coordinates make the equation for l1 equal to the equation for l2 by re-writing l2 as y=8-x. So 8-x=1.5x-2 (I've used 1.5 here because I can't input the fraction 3 over 2 easily.) Solve to find the x coordinate and then substitute this value into one of the equations to find the corresponding y coordinate. The other questions will respond to the same basic method. Hope this helps. Mr Riedel Claire,
Q8 b)
To find the coordinates make the equation for l1 equal to the equation for l2 by re-writing l2 as y=8-x.

So 8-x=1.5x-2 (I’ve used 1.5 here because I can’t input the fraction 3 over 2 easily.)

Solve to find the x coordinate and then substitute this value into one of the equations to find the corresponding y coordinate.

The other questions will respond to the same basic method.

Hope this helps.

Mr Riedel

]]> By: Mr Riedel http://www.shsmaths.com/2007/11/mr-riedels-year-12-class-straight-lines/comment-page-1/#comment-2124 Mr Riedel Thu, 08 Nov 2007 22:56:41 +0000 http://shsmaths.wordpress.com/2007/11/02/mr-riedels-year-12-class-straight-lines/#comment-2124 Claire, I'm so sorry I was on a trip today so I don't have a copy of C1 at home. I'll try to give an answer as soon as I'm in school in the morning. Mr Riedel Claire,
I’m so sorry I was on a trip today so I don’t have a copy of C1 at home. I’ll try to give an answer as soon as I’m in school in the morning.
Mr Riedel

]]> By: claire.f http://www.shsmaths.com/2007/11/mr-riedels-year-12-class-straight-lines/comment-page-1/#comment-2126 claire.f Thu, 08 Nov 2007 12:16:05 +0000 http://shsmaths.wordpress.com/2007/11/02/mr-riedels-year-12-class-straight-lines/#comment-2126 I was going to come and find you today to ask about the homework, but i am REALLY ill. so i started some maths but i got stuck. Ex 5F Q8 i can do a) and i got the right answer but then i dont know how to calculate the coordinates of point D and i had the same problem with 5 b) and actually i didnt get 2b) either. it is just finding the coordinates that i dont get I was going to come and find you today to ask about the homework, but i am REALLY ill.

so i started some maths but i got stuck.
Ex 5F Q8 i can do a) and i got the right answer but then i dont know how to calculate the coordinates of point D

and i had the same problem with 5 b)

and actually i didnt get 2b) either.

it is just finding the coordinates that i dont get

]]>