Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Solve the following system.
4x^2 + 9y^2 =72
x^2  y^2 = 5
The solutions are?
 one year ago
 one year ago
Solve the following system. 4x^2 + 9y^2 =72 x^2  y^2 = 5 The solutions are?
 one year ago
 one year ago

This Question is Closed

thejoshfishBest ResponseYou've already chosen the best response.0
i've tried to do this at least 5 times. i don't understand it at all
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
dw:1337656235090:dw
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
dw:1337656263685:dw
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
dw:1337656308816:dw
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
or multiply the second equation by 4
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
dw:1337656338440:dw
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
dw:1337656365038:dw
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
dw:1337656398578:dw
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
\[4x^2+9y^2=72\] \[4(x^2y^2)=4(5)\]
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
dw:1337656433069:dw
 one year ago

thejoshfishBest ResponseYou've already chosen the best response.0
there's supposed to be 2 solutions: The solutions are: (_,_) & (_,_)
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
\[4x^2+9y^2=72\] \[4x^2+4y^2=20\] add them together to get \[13y^2=52\]
 one year ago

thejoshfishBest ResponseYou've already chosen the best response.0
trust me, i've gotten all the solutions possible. but the answer is still wrong.
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
\[y^2=\sqrt{\frac{52}{13}}\]
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
the solutions are : sqrt(52/11) and sqrt(107/11)
 one year ago

thejoshfishBest ResponseYou've already chosen the best response.0
but there's 4 solutions.
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
@ outkast i think y = sqrt(52/11) u wrote y^2 = sqrt(52/13) ?
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
yeah i think there might be aproblem with your's mine is correct i thinkkk let me check
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
yeah mine is correct .. by elimination
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
u can write it as : dw:1337656633671:dw
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
i'ma cheat *grabs calculator
 one year ago

thejoshfishBest ResponseYou've already chosen the best response.0
lol, i've done that too! ^
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
ahh wait mathslover you have 7 instead of 9
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
hey sorry , i took 4x^2 + 7y^2 but it is 4x^2 + 9y^2 , therefore the 4 solutions are : dw:1337656820684:dw
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
i believe you made a 9 really badly and thought it was a 7 the first equation is 4x^2+9y^2=72
 one year ago

brinetheryBest ResponseYou've already chosen the best response.1
For y, I got y= +/ sqrt (52/13)
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
thats right now for x
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
yes sorry , y = + 2 , 2 x = +3 , 3
 one year ago

mathsloverBest ResponseYou've already chosen the best response.1
@Outkast3r09 x = +3 , 3 right ?
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
\[x^2(2^2)=5\] \[x^2(2^2)=5\]
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
\[x^24=5\] \[x^24=5\]
 one year ago

radarBest ResponseYou've already chosen the best response.1
\[\sqrt{52/13}=\pm2\]\[x ^{2}=9\]\[x=\pm3\]
 one year ago

brinetheryBest ResponseYou've already chosen the best response.1
I was slow, I was using a crappy calculator.
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
does this mean it's a multiplicity of 2?
 one year ago

brinetheryBest ResponseYou've already chosen the best response.1
@thejoshfish did you try putting in y= +/ sqrt (52/13) and x=+/ 3?
 one year ago

brinetheryBest ResponseYou've already chosen the best response.1
@Outkast3r09 it means 3*3 and (3)(3).
 one year ago

thejoshfishBest ResponseYou've already chosen the best response.0
i sure did. haha trust me, i tried everything. i'm so fed up. but you guys are wonderful.
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
those are your answers are you using like owl or whatever
 one year ago

brinetheryBest ResponseYou've already chosen the best response.1
Talk with your instructor. I'm taking statics and have the instructor's manual. They're wrong way more times than I'd like them to be. I think the grad students who write the manuals aren't getting enough sleep.
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
Online web learning
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
what does it say the answers are josh?
 one year ago

thejoshfishBest ResponseYou've already chosen the best response.0
alpha omega academy
 one year ago

thejoshfishBest ResponseYou've already chosen the best response.0
it doesn't tell me. but thanks for helping.
 one year ago

Outkast3r09Best ResponseYou've already chosen the best response.2
sometimes those sites have like a function button with like + and what not . that could be the problem or try 3,3 , 2 ,2
 one year ago

brinetheryBest ResponseYou've already chosen the best response.1
If you have to take the higher level physics series, they might make you use MasteringPhysics. Have fun with that! Groans.
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.