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Mariana [72]
2 years ago
9

Calculate the area of a circle with radius of 2 cm

Mathematics
2 answers:
Volgvan2 years ago
7 0
Area= π × r²
<span>
π  = 3.14</span>
3.14 x 2²
<span>3.14 x 4 
</span>
Area ≈ 12.56
Mariulka [41]2 years ago
6 0
A = pi × r²

3.14 x 2²

3.14 x 4 

A = 12.56636 ≈ 12.56
 
hopefully this helps u and if u know the formula to solve it, it is super easy

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which equation is a point slope form equation for line AB? y+1=−32(x−4) y+1=32(x−4) y+1=−23(x−4) y+1=23(x−4) A graph with a line
lorasvet [3.4K]

Answer:

3

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Given that x and y are positive integers, solve the equation x² - 4y² = 13​
zvonat [6]
<h3>Answer:  x = 7 and y = 3</h3>

=====================================================

Explanation:

Apply the difference of squares rule

x² - 4y² = 13

x² - (2y)² = 13

(x - 2y)(x + 2y) = 13

Since x and y are positive integers, this means x-2y and x+2y are both integers as well.

The value 13 is prime. Its only factors are 1 and 13

Since the above equation shows 13 factoring into x-2y and x+2y, then we have two cases:

  • A) x-2y = 1 and x+2y = 13
  • B) x-2y = 13 and x+2y = 1

----------------

Let's consider case A

We have this system of equations

\begin{cases}x-2y = 1\\x+2y = 13\end{cases}

Add the equations straight down

  • x+x becomes 2x
  • -2y+2y becomes 0y = 0 which goes away
  • 1+13 becomes 14

Therefore we have 2x = 14 solve to x = 7

From here, plug this into either equation to solve for y

x-2y = 1

7 - 2y = 1

-2y = 1-7

-2y = -6

y = -6/(-2)

y = 3

You should get the same result if you used x+2y = 13

----------------

Since we've found that x = 7 and y = 3, notice how case B is not possible

Example:  x-2y = 13 becomes 7-2(3) = 13 which is false.

Also, x+2y = 1 would turn into 7+2(3) = 1 which is also false.

-----------------

Let's check those x and y values in the original equation

x² - 4y² = 13

7² - 4*(3)² = 13

49 - 4(9) = 13

49 - 36 = 13

13 = 13

The answer is confirmed.

4 0
2 years ago
Find the quotient. h^ 6 ÷h
Arada [10]
h^6:h=h^{6-1}=\boxed{h^5}
6 0
3 years ago
Read 2 more answers
If you could please help good sir...
Vladimir [108]

Answer:10

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Carl bought some stock at $25 a share the stock increased to 1 1/2 times its value how much is the stock per share please help t
Anestetic [448]
Do 25 divided by 1/2 to get your answer. Thanks! Brainly Team
6 0
3 years ago
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