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Vitek1552 [10]
2 years ago
15

I need help on this question as soon as possible. If anybody can give me the correct answer I’ll give brainly. I just need help.

This is my 2nd question and there is 11 questions

Mathematics
1 answer:
3241004551 [841]2 years ago
3 0

Answer:

The solution of the system is (6, 9).

Step-by-step explanation:

Solve one of the variables and substitute the answer for the other variable.

Select one of the problems and solve for x.

3x+y=27

Subtract y from both sides.

3x+-y=27

Divide both sides by three.

x=1/3(-y + 27)

Multiply 1/3 by -y + 27.

x = -1/3y + 9

Replace -y/3 + 9 for x in the other problem 3x-2y=0.

3(-1/3y + 9) - 2y = 0

Multiply 3 by -y/3 + 9.

−y+27−2y=0

Add -y to -2y.

−3y+27=0

Subtract 27 from both sides of the problem.

−3y=−27

Divide both sides by −3.

y=9

Replace 9 for y in x=−1/3​y+9.

x=−1/3*9+9

Multiply −1/3​ times 9.

x=-3+9

Add 9 to -3.

x = 6.

x = 6, y = 9.

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The diagram shows a circular pond, of radius r metres, surrounded by a circular path.The circular path has a constant width of 1
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The formula for calculating the area of a circle is expressed as;

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Since the  area of the path is equal to the area of the pond, hence;

π(r+1.5)² - πr² = πr²

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Expand the parenthesis

r²+3r + 2.25 = 2r²

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<em>This proves the required equation</em>

<em />

Learn more on area of composite figures here: brainly.com/question/15981553

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