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Zanzabum
3 years ago
6

SOMEONE PLEASE HELP ME ASAP PLEASE!!​

Mathematics
1 answer:
kogti [31]3 years ago
8 0
Y = 4/5 + (-2)
Explanation: try this out yourself to see if it works
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∫∫(x+y)dxdy ,d là miền giới hạn bởi x²+y²=1
igor_vitrenko [27]

It looks like you want to compute the double integral

\displaystyle \iint_D (x+y) \,\mathrm dx\,\mathrm dy

over the region <em>D</em> with the unit circle <em>x</em> ² + <em>y</em> ² = 1 as its boundary.

Convert to polar coordinates, in which <em>D</em> is given by the set

<em>D</em> = {(<em>r</em>, <em>θ</em>) : 0 ≤ <em>r</em> ≤ 1 and 0 ≤ <em>θ</em> ≤ 2<em>π</em>}

and

<em>x</em> = <em>r</em> cos(<em>θ</em>)

<em>y</em> = <em>r</em> sin(<em>θ</em>)

d<em>x</em> d<em>y</em> = <em>r</em> d<em>r</em> d<em>θ</em>

Then the integral is

\displaystyle \iint_D (x+y)\,\mathrm dx\,\mathrm dy = \iint_D r^2(\cos(\theta)+\sin(\theta))\,\mathrm dr\,\mathrm d\theta \\\\ = \int_0^{2\pi} \int_0^1 r^2(\cos(\theta)+\sin(\theta))\,\mathrm dr\,\mathrm d\theta \\\\ = \underbrace{\left( \int_0^{2\pi}(\cos(\theta)+\sin(\theta))\,\mathrm d\theta \right)}_{\int = 0} \left( \int_0^1 r^2\,\mathrm dr \right) = \boxed{0}

3 0
2 years ago
Translate and solve: eight more than the product of three and a number is -13
Murrr4er [49]
Ok, so let’s take the given phrase.
Eight more than the product of 3 and a number is -13. A translation to numbers looks like this:
3x + 8 = -13
Now, let’s solve for x. We can start the process by subtracting 8 from both sides.
3x = -21
now, we will divide each side by 3 to isolate the variable, thus solving for x.
x = -7
6 0
3 years ago
what is the altitude corresponding to the side of length 8.5 CM in a parallelogram whose area is 34 CM square
Crazy boy [7]
Area = length of base × altitude
34 = 8.5 × a
34 = 8.5a
a = 34/8.5
a = 4

The altitude of the corresponding side is 4 cm
4 0
2 years ago
You roll a 6-sided die two times.<br> What is the probability of rolling a 2 and then rolling a 3?
docker41 [41]

Answer:

The answer is 1/3 or 4 out 12

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
What is the mean of the data set?<br> 108, 305, 252, 113, 191
irinina [24]

Go to the third pic for your answer. I got problem 4 wrong but it shows the correct answer.

7 0
3 years ago
Read 2 more answers
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