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Mathematics: Post your doubts here!

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Someone please help me with Paper 31, I need the solution for 8, 9 and 10. I need it before tomorrow please.
 
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I gave AS math but my P1 score was not good but i did well in stats. If i just give my P1 exam and be absent for my stats exam, will cie take my stats score from my AS level???
 
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We had to show a point of reflection, hence we have x1,y1 as (-1,3) and we found a midpoint (3,9) by sim. equation,
So, as to find midpoint we do (x1+x2)/2, and (y1+y1)/2,
similarly,
We know have to find x2 and y2, we have x1 y1 and midpoint :)
so (x1,y1, + x2,y2)/2 = midpoints
=(-1,3 + x2,y2) = 2(3,9)
=(-1,3 + x2,y2) = (6,18)
x2=(6-(-1))=7
y2=(18-3)=15

so reflection on (7,15)

You can find the answer here as well :¬
s.png
 
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