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Mathematics 12 Online
OpenStudy (howard-wolowitz):

MATH QUESTION!

OpenStudy (anonymous):

@Howard-Wolowitz i think it might be A,1 but i don't know for sure cuz it is a bit hard

OpenStudy (anonymous):

\[Y = \frac{ 21 }{ X }\] Beacuse\[3 = \frac{ 21 }{ 7 }\]

OpenStudy (anonymous):

i think

OpenStudy (anonymous):

I can't see it because its too small.

OpenStudy (howard-wolowitz):

@Michele_Laino

OpenStudy (howard-wolowitz):

click to zoom

OpenStudy (michele_laino):

hint: when y varie inversely with x, then we can write: \[yx = k\] where k is a constant

OpenStudy (michele_laino):

varies*

OpenStudy (anonymous):

@undeadknight26

OpenStudy (howard-wolowitz):

B

OpenStudy (howard-wolowitz):

wouldnt y=?

OpenStudy (howard-wolowitz):

y=kx

OpenStudy (michele_laino):

we have to subsstitute x=7 and y=3, so we have: 3*7=k what is the value of k?

OpenStudy (howard-wolowitz):

21

OpenStudy (michele_laino):

ok! So our formula, will become: \[yx = 21\]

OpenStudy (michele_laino):

that's your answer

OpenStudy (michele_laino):

so what is the right option?

OpenStudy (howard-wolowitz):

B

OpenStudy (michele_laino):

are you sure?

OpenStudy (howard-wolowitz):

21 / x

OpenStudy (michele_laino):

it is the third option! congrats!

OpenStudy (anonymous):

@brooklyn<3you it is against coc to tell direct answers

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