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belka [17]
2 years ago
7

Find the circumference of the circle

Mathematics
2 answers:
Alika [10]2 years ago
7 0

Answer:

The answer is 22 centimeters.

Step-by-step explanation:

How to find the circumference:

Radius squared times pie.

I hope this helped!!!

harkovskaia [24]2 years ago
3 0
The circumstances is.. 21.99

Rounding it to be 22

Hope this helps!!
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Noah is standing 5 feet from a tree that is 12 feet tall. If Noah is looking at
Anastaziya [24]

Answer:

7

Step-by-step explanation:

5 0
3 years ago
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 9.24 divided by 6
daser333 [38]

Answer:

1.54

Step-by-step explanation:

a calculator provides the precise answer efforessly

5 0
2 years ago
A coin is tossed 1000 times and heads showed up 625 and tails 375
Mnenie [13.5K]

Answer:

Heads: 5/8

Tails: 3/8

Step-by-step explanation:

The probability of getting tails is 375/1000 OR 3/8.

The probability of getting heads is 625/1000 OR 5/8.

4 0
3 years ago
When graphing a system of equations with no solution the y-intercept of the two lines will be?
Varvara68 [4.7K]

Answer:

The answer is B

Step-by-step explanation:

5 0
2 years ago
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