It all depends on the importance of the variable its self. Its important to solve it so you know what the variable is and its important to solve one at a time because its impossible to solve a variable completely if you have two of them

8 0

4 years ago

A charity organization is collecting trash from the highway. The bags are placed in one box and weighed. Use the table to write

tatuchka [14]

6 bags=38 pounds heeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

8 0

4 years ago

Anyone really good in math help me out pleaseeee

Jlenok [28]

Answer:

Hi there!

The answer to this question is: A

y= [x] + 5

8 0

3 years ago

Find the area of the surface. the part of the paraboloid z=4-x^2-y^2 that lies above the xy-plane

11Alexandr11 [23.1K]

Parameterize the surface (call it $\mathcal S$ ) by

$\mathbf s(u,v)=\langle u\cos v,u\sin v,4-u^2\rangle$

with $0\le u\le2$ and $0\le v\le2\pi$ . Then the surface element is

$\mathrm dS=\|\mathbf s_u\times\mathbf s_v\|=u\sqrt{1+4u^2}\,\mathrm du\,\mathrm dv$

The area of $\mathcal S$ is then given by the surface integral

$\displaystyle\iint_{\mathcal S}\mathrm dS=\int_{v=0}^{v=2\pi}\int_{u=0}^{u=2}u\sqrt{1+4u^2}\,\mathrm du\,\mathrm dv$
$=\displaystyle2\pi\int_{u=0}^{u=2}u\sqrt{1+4u^2}\,\mathrm du=\dfrac{(17^{3/2}-1)\pi}6\approx36.1769$

6 0

3 years ago