NicholausBlackmon
  • NicholausBlackmon
Please help me! What is the solution set to the following system? x+y=3 X^2+Y^2=9
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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ParthKohli
  • ParthKohli
how do you think you'll go about this? can you try substituting one variable in terms of the other?
NicholausBlackmon
  • NicholausBlackmon
i wanted to try substituting but i didnt think it would work because the answers here are like this (x,y) and (x,y). Its asking for two sets of answers
NicholausBlackmon
  • NicholausBlackmon
i know how to get the first set but then how would i start to get the second?

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More answers

ParthKohli
  • ParthKohli
Think about it like this: when you use substitution for two-variable linear equations, you solve for only one variable. Then you substitute the value you found BACK into the equation to find the value of the other variable.
NicholausBlackmon
  • NicholausBlackmon
(0,-3),(3,0) (0,3),(-3,0) (0,3),(3,0) (0,-3),(-3,0) these are the answers. see what i mean?
NicholausBlackmon
  • NicholausBlackmon
I think its (0,3),(-3,0)
ParthKohli
  • ParthKohli
You're given the answers. Why not try to substitute these into the equations and see which ones are correct? ;P
ParthKohli
  • ParthKohli
Does (-3, 0) satisfy x + y = 3? See what I'm talking about?
NicholausBlackmon
  • NicholausBlackmon
I see what you are saying. I was so clueless. Thanks!
NicholausBlackmon
  • NicholausBlackmon
I think the only answer is (0,3), (-3,0)
NicholausBlackmon
  • NicholausBlackmon
yea. its the only one that works
ParthKohli
  • ParthKohli
Again, I ask: does (-3, 0) satisfy x + y = 3?
NicholausBlackmon
  • NicholausBlackmon
wait...no
ParthKohli
  • ParthKohli
Why/why not?
NicholausBlackmon
  • NicholausBlackmon
because -3+0 doesnt equal 3
ParthKohli
  • ParthKohli
Correct.
NicholausBlackmon
  • NicholausBlackmon
OHH. ITS (0,3), (3,0)
ParthKohli
  • ParthKohli
Amazing. Yeah
NicholausBlackmon
  • NicholausBlackmon
i've been up for 34 hours taking finals. sorry
NicholausBlackmon
  • NicholausBlackmon
I neede to get this done before i took my math final
NicholausBlackmon
  • NicholausBlackmon
neded*
NicholausBlackmon
  • NicholausBlackmon
needed* geez

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