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3 years ago

Write a formula for perimeter and area of a circle Thank you !

Mathematics

2 answers:

Oduvanchick [21]3 years ago

7 0

Answer:

Perimeter of a circle = 2 π r = π D.

Area of a circle is pi times the radius squared (A = π r²).

Ratling [72]3 years ago

3 0

Answer:

The area of a circle is πr2 and the perimeter (circumference) is 2πr

thank you 

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Partial fraction decomposition 20x+9/25x^2+20x+4

ozzi

Step-by-step explanation:

We have

$\frac{20x + 9}{25 {x}^{2} + 20x + 4 }$

Let's factor the denomiator first,

the denomaitor is a perfect square so we get

$\frac{20x + 9}{(5x + 2) {}^{2} }$

Now, we must think of two fractions that

$\frac{a}{(5x + 2) {}^{2} } + \frac{b}{5x + 2}$

We use a perfect square term for one fraction, then a linear one for the next, because if we set both of the denomiator to the same factor, we would get a inconsistent system.

So right now, we have

$\frac{a}{(5x + 2) { }^{2} } + \frac{b}{5x + 2} = \frac{20x +9 }{25 {x}^{2} + 20x + 4 }$

$a + (5x + 2)b = 20x + 9$

$5b (x)= 20$

$a + 2b = 9$

$b = 4$

so that means that a is

$a + (2)(4) = 9$

$a + 8 = 9$

$a = 1$

So our equation is

$\frac{1}{(5x + 2) {}^{2} } + \frac{4}{5x + 2}$

6 0

2 years ago

At 1:00 p.m. u have 24 megabytes of a movie. At 1:15 p.m. u have 96 megabytes. What is the downloads rate in megabytes per minut

guajiro [1.7K]

Answer:

I believe it is 4.8

Step-by-step explanation:

96-24= 72

72/15 minutes= 4.8

5 0

2 years ago

4+x*100%-41-y/14*9(23/78)*6289-2.987075347=

geniusboy [140]

Answer:

wenus.

Step-by-step explanation:

4 inches. hduruuruthtututuu4u4

8 0

3 years ago

What x2-21x-100 in standard form

NARA [144]

Answer:

(x -25)(x+4)

Step-by-step explanation:

x²-21x -100

x²-25x+4x-100

x(x-25)+4(x-25)

(x+4)(x-25).

4 0

3 years ago

For more than three times a number is greater than 22

TiliK225 [7]

Answer:

Four more than three times a number is greater than twenty-two.What is the number?

The number is greater than 6.

Step-by-step explanation:

Given:

Four more than three times a number is twenty-two.

Let the number be 'x'.

Three times of 'x' = '3x'

Four more means further four is added.

So,

The number is $3x+4$

According to the question.

⇒ $3x+4=22$

⇒ $3x+4-4=22-4$ ...Subtracting 4 on both sides

⇒ $3x=18$

⇒ $x=\frac{18}{3}=6$ ...Dividing 6 on both sides

Now if it says that it is greater than 22 then we will use $>$ sign.

So the number is greater than 6 'x' > 6.

5 0

3 years ago