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3 years ago

What’s 2(a+b) if a=2 and b=3

Mathematics

2 answers:

GalinKa [24]3 years ago

5 0

Answer:

10.

Step-by-step explanation:

2(a+b)

= 2(2+3)

= 2(5)

= 10

Hope this helped!

Lesechka [4]3 years ago

4 0

Answer:

Step-by-step explanation:

2(2+3) FOIL

2x2=4

2x3=6

4+6=10

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LenKa [72]

If x=5 the answer is 0

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3 years ago

Surface integrals using a parametric description. evaluate the surface integral \int \int_{s} f(x,y,z)dS using a parametric desc

DiKsa [7]

You can parameterize $S$ using spherical coordinates by

$\vec s(u,v)=\langle6\cos u\sin v,6\sin u\sin v,6\cos v\rangle$

with $0\le u\le2\pi$ and $0\le v\le\frac\pi2$ .

Take the normal vector to $S$ to be

$\dfrac{\partial\vec s}{\partial\vec v}\times\dfrac{\partial\vec s}{\partial\vec u}=36\langle\cos u\sin^2v,\sin u\sin^2v,\cos v\sin v\rangle$

(I use $\vec s_v\times\vec s_u$ to avoid negative signs. The orientation of the normal vector doesn't matter for a scalar surface integral; you could just as easily use $\vec s_u\times\vec s_v=-(\vec s_v\times\vec s_u)$ .)

Then

$f(x,y,z)=f(6\cos u\sin v,6\sin u\sin v,6\cos v)=36\sin^2v$

and the integral of $f$ over $S$ is

$\displaystyle\iint_Sf(x,y,z)\,\mathrm dS=\int_0^{\pi/2}\int_0^{2\pi}36\sin^2v\left\|\frac{\partial\vec s}{\partial v}\times\frac{\partial\vec s}{\partial u}\right\|\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^{\pi/2}\int_0^{2\pi}(36\sin^2v)(36\sin v)\,\mathrm du\,\mathrm dv$

$=\displaystyle2592\pi\int_0^{\pi/2}\sin^3v\,\mathrm dv=\boxed{1728\pi}$

7 0

3 years ago

The data in the table can be entered into a calculator to determine a linear equation of best fit where x represents the number

Yakvenalex [24]

Based on the data given, the conclusion that can be drawn from the correlation coefficient associated with the linear equation is C. There's a weak negative correlation between the variables.

<h3>How to illustrate the information?</h3>

From the information given, it can be seen that the value of y is increasing with the increase in the value of x.

This implies that the correlation is positive. Also, the change in the values of y with x are scattered a lot.

Therefore, the conclusion that can be drawn from the correlation coefficient associated with the linear equation is that there's a weak negative correlation between the variables

Learn more about data on:

brainly.com/question/4219149

#SPJ1

7 0

2 years ago

Please help me no links

Sauron [17]

Its 81 good job on the question

8 0

3 years ago

Read 2 more answers

Can anybody help me on this assignment I've been working on it for weeks and I can't get the slope

mr Goodwill [35]

Answer:

Y=7/3x+3

Step-by-step explanation:

you start at the y intercept which is b. you would then do a rise over run, starting with the lowest value ont the grid. you will count 7 up, and then you do run, which is counting across. you will get 3. your answer is y=7/3x+3

6 0

3 years ago