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# Maths Core 1 help please? watch

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1. How do you delete a thread?
2. Perpendicular means it is the invert and negative of the line above so for example the gradient of line 1 is 2x so the perpendicular gradient of line 2 would be -1/2x do the rest for yourself.
3. (Original post by Super199)
Tututut. Shouldn't really be posting full solutions especially if they are incorrect!
Is it incorrect?
4. (Original post by TajwarC)
Is it incorrect?
Yup . Check your gradient of the original equation again. Why did you divide by 2 and not 4?
5. (Original post by Super199)
Yup . Check your gradient of the original equation again. Why did you divide by 2 and not 4?
KNEW IT! lemme edit..
6. (Original post by TajwarC)
KNEW IT! lemme edit..
Shouldn't be giving out full solutions though. It doesn't benefit the OP, instead give them hints on how to start or where they are going wrong
7. (Original post by Super199)
Shouldn't be giving out full solutions though. It doesn't benefit the OP, instead give them hints on how to start or where they are going wrong
8. (Original post by TajwarC)
KNEW IT! lemme edit..
Don't edit, delete it. You can't give full solutions here.
9. (Original post by hannasmith1997)
find the gradient of this line 4y+2x-3=0

line 2 is perpendicular to line 1 (above) and passes through point (2,5). write the equation for this line in the form y=mx+c

Thank you!
Well to begin with you want to re-arrange the equation to get y=mx+c, and then you want the y co-efficient to be 1 (hint divide everything by 4). The x- coefficient gives the gradient.

Line 2 is perpendicular so it will have a gradient of -1/gradient of the first line. You then need to use the equation y-y1=m(x-x1), substitute the gradient (m) and the co-ordinates, and then simplify to get the equation.

Hope it helps

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Updated: January 22, 2014
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