2 years ago

What value of w that makes the equation true 2/3(w+3) = 7

Mathematics

1 answer:

alexdok [17]2 years ago

3 0

The answer is 7.5 or 15/2

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kvv77 [185]

Answer:

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Step-by-step explanation:

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3 years ago

Whats 9+10 ?<br>A)12<br>B)21<br>C)19<br>D)9

Ostrovityanka [42]

Answer: 21

Step-by-step explanation: (If you're serious it's 19)

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3 years ago

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The general solution of 2 y ln(x)y' = (y^2 + 4)/x is

Sav [38]

Replace $y'$ with $\dfrac{\mathrm dy}{\mathrm dx}$ to see that this ODE is separable:

$2y\ln x\dfrac{\mathrm dy}{\mathrm dx}=\dfrac{y^2+4}x\implies\dfrac{2y}{y^2+4}\,\mathrm dy=\dfrac{\mathrm dx}{x\ln x}$

Integrate both sides; on the left, set $u=y^2+4$ so that $\mathrm du=2y\,\mathrm dy$ ; on the right, set $v=\ln x$ so that $\mathrm dv=\dfrac{\mathrm dx}x$ . Then

$\displaystyle\int\frac{2y}{y^2+4}\,\mathrm dy=\int\dfrac{\mathrm dx}{x\ln x}\iff\int\frac{\mathrm du}u=\int\dfrac{\mathrm dv}v$

$\implies\ln|u|=\ln|v|+C$

$\implies\ln(y^2+4)=\ln|\ln x|+C$

$\implies y^2+4=e^{\ln|\ln x|+C}$

$\implies y^2=C|\ln x|-4$

$\implies y=\pm\sqrt{C|\ln x|-4}$

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2 years ago

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butalik [34]

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3 years ago

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What is 9-14 lolol.

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Lolz lolz is lolz lolz 782

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2 years ago

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