Mathematics
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OpenStudy (anonymous):
Circles M and K are congruent. QR is congruent to LN and OP is congruent to VW. Find x and y.
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OpenStudy (anonymous):
hartnn (hartnn):
QR =LN
8 = 3x+4y
hartnn (hartnn):
OP =VW
5y+13 = 2x
hartnn (hartnn):
can you try to solve those 2 equations simultaneously ?
OpenStudy (anonymous):
This is what I get: (0,-13/5) (1, -11/5)
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OpenStudy (anonymous):
from the second equation
hartnn (hartnn):
you know method of elimination ?
or substitution?
OpenStudy (anonymous):
elimination :)
hartnn (hartnn):
3x+4y =8
2x -5y =13
Multiply 1st equation by5
and 2nd equation by 4
OpenStudy (anonymous):
15x+20y=45
8x-20y=52
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hartnn (hartnn):
8*5 =...
OpenStudy (anonymous):
40 sorry!!!
hartnn (hartnn):
no problem :)
15x+20y=40
8x-20y=52
now add these two equations!
and see that 'y' gets eliminated magically!
OpenStudy (anonymous):
y=-1 x=4??
hartnn (hartnn):
correct! :) good work
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OpenStudy (anonymous):
THANKYOUUU! would you PLEASE help me with another one :)??
hartnn (hartnn):
sure
OpenStudy (anonymous):
thankyouu
OpenStudy (anonymous):
Circles M and K are congruent. QR is congruent to LN and OP is congruent to VW. Find x and y.
hartnn (hartnn):
could u set up the equations ?
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OpenStudy (anonymous):
y=2x-3
y=x-1?
hartnn (hartnn):
good!
OpenStudy (anonymous):
which would lead to x=2 and y=1?
hartnn (hartnn):
correct :)
OpenStudy (anonymous):
:O thankyouuu!! but this one is different would you please explain it to me?
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OpenStudy (anonymous):
Find mBC if Angle A is equal to 18° and mDC measures 48°
hartnn (hartnn):
i'm not sure about that sorry, can you please ask it as a new question ? others will surely hep you :)
OpenStudy (anonymous):
I will thankyouu!!