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Old 05-6-2012, 09:08 PM   #1
AnUnknownDrummer
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Default [Precalc Algebra] Systems of Nonlinear Equations

Somewhere in my math I keep butchering this problem, I know it's really easy but my numbers aren't matching up.

1. y = 8 - x
2. y = sqrt(36 - x^2)

I need to graph by hand (which I did using a T-chart) and then solve for intersections algebraically.

I figured I could use the substitution method with #1:
y = 8 - x
y + x = 8
x = 8 + y
and substitute that value into #2:
y = sqrt(36 - [8 + y]^2)

after this my numbers don't add up. My math could be wrong before or after this point and I have no idea... Help?
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Old 05-6-2012, 09:11 PM   #2
dag12
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Default Re: [Precalc Algebra] Systems of Nonlinear Equations

silly you,
y+x=8 is
x=8-y
:P
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Old 05-6-2012, 09:13 PM   #3
AnUnknownDrummer
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Default Re: [Precalc Algebra] Systems of Nonlinear Equations

I hate my life... oh so much.


HAHAHAHA
Thank you!
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