Mathematics
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OpenStudy (anonymous):
Variable y varies directly with x2, and y = 72 when x = 6.
Enter the constant of variation for the quadratic variation equation.
y = ___x^2
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OpenStudy (anonymous):
@dtan5457
OpenStudy (dtan5457):
72=k(6^2)
solve for k, which is the same question as the last one you just posted lol
OpenStudy (anonymous):
36?
OpenStudy (dtan5457):
72=k(36)
OpenStudy (dtan5457):
k=36?
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OpenStudy (anonymous):
So 36 is what I put in?
OpenStudy (dtan5457):
Does 36 times 36=72?
OpenStudy (anonymous):
Oh!
OpenStudy (dtan5457):
No...36 times_____=72?
OpenStudy (anonymous):
I forgot the last step. 2?
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OpenStudy (anonymous):
@dtan5457
OpenStudy (dtan5457):
Yeah, it's 2.
OpenStudy (anonymous):
Thank you:)
OpenStudy (dtan5457):
y=kx^2
32=k(4^2)
32=k(16)
what is k?
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OpenStudy (anonymous):
2?
OpenStudy (dtan5457):
Yes
so your function would be y=2x^2
OpenStudy (dtan5457):
just find which graph has that
OpenStudy (anonymous):
D?
OpenStudy (dtan5457):
Both pictures are the same thing lol
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OpenStudy (dtan5457):
All I see is A and B
OpenStudy (anonymous):
Oh I didnt mean to do that one sec
OpenStudy (dtan5457):
It appears as if one of the answers are already there, but why not post just to make sure..
OpenStudy (anonymous):
OpenStudy (anonymous):
Do you see it @dtan5457
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OpenStudy (anonymous):
Please help It's my last question.
OpenStudy (anonymous):
@dtan5457
OpenStudy (dtan5457):
y=2x^2
Definitely not D..
One of d's points are 3,3
If you plug 3 into that function, you get 18 as y..
OpenStudy (anonymous):
b?
@dtan5457
OpenStudy (anonymous):
a?