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3 years ago

!!! WILL GIVE BRAINLIEST !! AND 15 POINTS PLS ANSWER !!!

Mathematics

1 answer:

12345 [234]3 years ago

6 0

Answer:

Step-by-step explanation:

It looks like it is, but in math, looks like isn't good enough. you only know two sides HJ = LK and LJ = LJ

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Evaluate the given integral by making an appropriate change of variables, where R is the region in the first quadrant bounded by

Whitepunk [10]

$\displaystyle\iint_R\sin(384x^2+486y^2)\,\mathrm dA$

Notice that Given that $R$ is an ellipse, consider a conversion to polar coordinates:

$\begin{cases}x(r,\theta)=\frac r8\cos\theta\\y(r,\theta)=\frac r9\sin\theta\end{cases}$

The Jacobian for this transformation is

$J=\begin{bmatrix}\frac18\cos\theta&-\frac r8\sin\theta\\\frac19\sin\theta&\frac r9\cos t\end{bmatrix}$

with determinant $\det J=\frac r{72}$

Then the integral in polar coordinates is

$\displaystyle\frac1{72}\int_0^{\pi/2}\int_0^1\sin(6r^2\cos^2t+6r^2\sin^2t)r\,\mathrm dr\,\mathrm d\theta=\int_0^{\pi/2}\int_0^1r\sin(6r^2)\,\mathrm dr\,\mathrm d\theta=\boxed{\frac{\pi\sin^23}{864}}$

where you can evaluate the remaining integral by substituting $s=6r^2$ and $\mathrm ds=12r\,\mathrm dr$ .

5 0

3 years ago

There were 300 seats in the school gym. Of the all the seats 120 had stripes and the rest had polka dots on them. What percentag

iragen [17]

300-120 = 180
180/300 = 60%

So 60%

8 0

3 years ago

Can somebody help me with this question ?? :)

S_A_V [24]

Answer:

x = 44°

Step-by-step explanation:

Since this is an isosceles triangle, the other angle that isn't defined is also 68°. So, since all the angles add up to 180°,

x + 68(2) = 180

x + 136 = 180

x = 44°

8 0

3 years ago

Read 2 more answers

You roll one 6sided dle, what is the probability of getting a 3, given that you know the number is odd?

katovenus [111]

Answer:

1/6

Step-by-step explanation:

Total number of outcome = 6. This is because it has 6 sides from number 1 to 6.

A) Probability of getting number 3 = 1/6 . This is because we have only one 3 in the outcome.

B) probability of getting odd number = total number of odd number ÷ total outcome .

The odd number are 1,3,5.

Therefore prob(odd) = 3/6 =1/2

I hope this was helpful, please mark as brainliest

4 0

3 years ago

Read 2 more answers

Help me please. 50 points!

natima [27]

Answer:

B for sure!

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers