2 years ago

Please help I’m being timed on this! ://

Mathematics

1 answer:

Llana [10]2 years ago

3 0

Answer:

its going to be D (x,y) - (x-2,y-4)

Step-by-step explanation:

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Evaluate the surface integral. ??s (x2 y2 z2 ds s is the part of the cylinder x2 y2 = 4 that lies between the planes z = 0 and z

kondor19780726 [428]

The surface $S$ can be parameterized by

$\mathbf r(\theta,z)=(2\cos\theta,2\sin\theta,z)$

where $0\le\theta\le2\pi$ and $0\le z\le2$ . Then the surface integral can be computed with

$\displaystyle\iint_S(x^2+y^2+z^2)\,\mathrm dS$
$\displaystyle=\int_{\theta=0}^{\theta=2\pi}\int_{z=0}^{z=2}(4\cos^2\theta+4\sin^2\theta+z^2)\|\mathbf r_\theta\times\mathbf r_z\|\,\mathrm dz\,\mathrm d\theta=\dfrac{128\pi}3$

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2 years ago

-4x - 28y=56 4x + 14y=-28

ddd [48]

Adding the 2 equations will eliminate x because -4x + 4x = 0
so we get
-14y = 28
y = -2
plug this into the second euqtion:-
4x + 14(-2) = -28
4x - 28 = -28
x = 0

answer is x = 0 , y = -2

4 0

3 years ago

Please help, basic algebra. Find the value of x

Lesechka [4]

Answer:

X= 53

Random comment:

Hopefully i've helped you good luck.

4 0

3 years ago

Read 2 more answers

Help ;-; Im almost overdue and I'n only on Q.13/24