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3 years ago

573÷3 i feel like i did something wrong with the 27

Mathematics

2 answers:

Tom [10]3 years ago

7 0

You did everything right. The correct answer is 191

Hope this helps

slavikrds [6]3 years ago

3 0

Looks good to me. Honestly Keep it up

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What operation should be performed SECOND to solve this problem?

Molodets [167]

Answer
<span>B multiplication

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3 years ago

Show that (2xy3 + cos x)dx + (3x2 y2 − sin y)dy = 0 is exact, and find the solution. Find c if y(0) = π

Licemer1 [7]

We're looking for a solution of the form $F(x,y)=C$ . By the chain rule, this solution should have total differential

$\mathrm dF=\dfrac{\partial F}{\partial x}\,\mathrm dx+\dfrac{\partial F}{\partial y}\,\mathrm dy=0$

and the equation is exact if the mixed second-order partial derivatives of $F$ are equal, i.e. $\frac{\partial^2F}{\partial x\partial y}=\dfrac{\partial^2F}{\partial y\partial x}$ .

The given ODE is exact, since

$\dfrac{\partial(2xy^3+\cos x)}{\partial y}=6xy^2$

$\dfrac{\partial(3x^2y^2-\sin y)}{\partial x}=6xy^2$

Then

$\dfrac{\partial F}{\partial x}=2xy^3+\cos x\implies F(x,y)=x^2y^3+\sin x+f(y)$

$\dfrac{\partial F}{\partial y}=3x^2y^2-\sin y=3x^2y^2+\dfrac{\mathrm df}{\mathrm dy}$

$\dfrac{\mathrm df}{\mathrm dy}=-\sin y\implies f(y)=\cos y+C$

$\implies x^2y^3+\sin x+\cos y=C$

With $y(0)=\pi$ , we get

$\cos\pi=C\implies C=-1$

$\implies\boxed{x^2y^3+\sin x+\cos y=-1}$

6 0

3 years ago

HELP PLS ASAP I HAVE 6 MINUTES NO LINKS

Ainat [17]

you could say if you knew how many cubes there were in total, you could subtract them

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3 years ago

What is the value of a

liraira [26]

Answer:

b = 10

Step-by-step explanation:

In this question we have identified that b ( or short leg ) = 5 brainly.com/question/23589050

In the image provided in that question the, we are told that the hypotenuse = short leg times 2

If we have identified that the short leg = 5 then the hypotenuse = 5 * 2 which is equal to 10

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3 years ago

Which situation is best represented by the inequality below? 30x + 100 > 25x + 150

iris [78.8K]

Answer:

I think its the second one I might be wrong though

Step-by-step explanation:

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2 years ago

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