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cutiecomittee123
 one year ago
x^2+4y=100
4yx^2=20
How in the world so I solve this system of equations please help fast!
Do I use substitution? I don't clearly see how I would solve for x or y in either equation.
cutiecomittee123
 one year ago
x^2+4y=100 4yx^2=20 How in the world so I solve this system of equations please help fast! Do I use substitution? I don't clearly see how I would solve for x or y in either equation.

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you can use substitution because x^2 on the first equation is positive and negative on the second equation. They will cancel out

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0*as i was, the 4y's will cancel out

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0so add them together

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yup x^2(x^2)=2x^2 and then 100(20)=120 2x^2=120 120/2=60 x^2=60 and then take the square root

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0yeah so square root of 60 = x

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0exactly, and whatever x equals you plug it into to one of the equations to find y

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0I plugged it into the second equation and it worked. So does that mean there is only one solution?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0no the number you plugged in is the answer for x. The answer you got after you plugged it in is y

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0remember, there is an x and a y so there has to be at least 2 answers, one for each letter

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0Yeah so (sqrt60, 10) is the only solution?

cutiecomittee123
 one year ago
Best ResponseYou've already chosen the best response.0I got the answer wrong it was actually (6,4) :(((
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