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Maurinko [17]
2 years ago
13

100 POINTS!!!! I anwered A and B i just need help with C

Mathematics
1 answer:
laila [671]2 years ago
6 0

Answer:

You need to draw a data chart and plug in the coordinates brainliest?

Step-by-step explanation:

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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
Alenkasestr [34]

The formula for calculating the area of a circle is expressed as;

A = πr²

  • Area of the pond = πr²
  • Area of the path = Area of the path + pond - area of pond
  • Area of path = π(r+1.5)² - πr²

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

π(r+1.5)² - πr² = πr²

Add πr² to both sides

π(r+1.5)² - πr² + πr² =  πr² + πr²

π(r+1.5)² = 2πr²

(r+1.5)² =   2r²

Expand the parenthesis

r²+3r + 2.25 = 2r²

r²+3r + 2.25 - 2r² = 0

-r² + 3r + 2.25 = 0

r² - 3r - 2.25 = 0

Multiply through by 2

2r² - 6.0r - 4.5 = 0

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

<em />

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

3 0
3 years ago
Find the circumference of circle with a radius of 63mm. Use 22/7 for pi
Mariulka [41]

Answer:

396

Step-by-step explanation:

circumference of a circle is 2 x pi x r = 2 x 63 x (22/7) = 396

5 0
3 years ago
Read 2 more answers
Monica receives a flat rate of $25 and an hourly rate of $15 when she works. Which of the following equations represents the tot
shutvik [7]

Answer

d=25+15x I think

                   

5 0
3 years ago
Need help !!!!!!!!!!!!!!!!!!!
Lesechka [4]

Answer:

I'm guessing the answer is B againn XD

must be a lucky day for B!!

8 0
3 years ago
Can someone help me with this?? If you can't see the picture don't bother to answer.
Georgia [21]
J is correct. the scale is balanced, so x = 1. there are 9 1’s on the right, and 6 1’s on the left. there are 3 more blocks, and they would have to each be 1.
7 0
3 years ago
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