3 years ago

Need help on this please any one

Mathematics

2 answers:

Marat540 [252]3 years ago

8 0

If you use y=mx+b that should help you get it

LiRa [457]3 years ago

6 0

Try the app Desmos. Basically a graph and you type t he equation in.

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saul85 [17]

Answer:

49.5

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3 years ago

Show that ( 2xy4 + 1/ (x + y2) ) dx + ( 4x2 y3 + 2y/ (x + y2) ) dy = 0 is exact, and find the solution. Find c if y(1) = 2.

fredd [130]

$\dfrac{\partial\left(2xy^4+\frac1{x+y^2}\right)}{\partial y}=8xy^3-\dfrac{2y}{(x+y^2)^2}$

$\dfrac{\partial\left(4x^2y^3+\frac{2y}{x+y^2}\right)}{\partial x}=8xy^3-\dfrac{2y}{(x+y^2)^2}$

so the ODE is indeed exact and there is a solution of the form $F(x,y)=C$ . We have

$\dfrac{\partial F}{\partial x}=2xy^4+\dfrac1{x+y^2}\implies F(x,y)=x^2y^4+\ln(x+y^2)+f(y)$

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$\implies F(x,y)=x^2y^3+\ln(x+y^2)=C$

With $y(1)=2$ , we have

$8+\ln9=C$

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3 years ago

Calculate the perimeter of the rectangle if the length is 7cm and the height is 2cm

stepan [7]

Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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mrs_skeptik [129]

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3 years ago