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MaRussiya [10]
3 years ago
6

(x-13.4)^{2}+(y+2.6)^{2} = 100(x−13.4) 2 +(y+2.6) 2 =100left parenthesis, x, minus, 13, point, 4, right parenthesis, squared, pl

us, left parenthesis, y, plus, 2, point, 6, right parenthesis, squared, equals, 100 What is its center?
Mathematics
1 answer:
vazorg [7]3 years ago
6 0

Answer:

The center of the circle is (13.4, - 2.6).

Step-by-step explanation:

Circle:

  • The diameter of a circle is 2 times of its radius.
  • The area of a circle is \pi r^2, where is the radius of the circle.
  • The circumference of a circle is 2\pi r, where r is radius of the circle.

We know that,the equation of circle is in the form

(x-\alpha)^2+(y-\beta)^2= r^2

where (\alpha, \beta) is the center of the circle and r is the radius of the circle.

Given equation of circle is

(x-13.4)^2+(y+2.6)^2=100

The center of the circle is (13.4, - 2.6).

The radius of the given circle is \sqrt{100} units=10 units.

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20. A frock is marked Rs. 228 at a discount of 20% is given on it. What is the discount and
Darina [25.2K]

Answer and step-by-step explanation:

20. Because the discount is 20% of the given price so the discount would be"

228/100*20

= 45.6 Rs

Its selling price would be:

228 + 45.6 = 273.6 Rs

21. Sales tax would be:

450/100*5

= 22.5 Rs

Total price in bill = 22.5 + 450 = 472.5 Rs

22. 10% tax of 3300 would be:

3300/100*10 = 330 Rs

Price before tax = 3300 - 330 = 2970 Rs

23. He spent in total of:

2500 + 500 = 3000Rs

He sold for 3300 Rs

He gain 3300 - 3000 = 300 Rs profit

His loss gain percent = 3300/3000 * 100 = 110%

24. On the first bike, he earn:

2500/100*20 = 500 Rs

On the second bike, he lose:

2500/100*25 = 625 Rs

He lose in total of 625 -500 = 125 Rs

his loss percentage = (2500+500) + (2500 - 625) / 5000* 100

= 100% - (2500+500) + (2500 - 625) / 5000* 100

= 100% - 97.5%

He lose 2.5% money

Hope this helped :3

5 0
3 years ago
The volume of a spherical balloon is increasing at the constant rate of 8 cubic feet per minute. How fast is the radius incresin
OverLord2011 [107]

Answer:

Rate of increase of radius = 0.0064 ft/sec

Rate of increase of surface area = 1.61 ft^2/sec

Step-by-step explanation:

Given that:

Rate of change of volume of a spherical balloon = 8 cubic feet per minute

\dfrac{dV}{dt} = 8 ft^3/min

Radius, r = 10 feet

To find:

The rate of change of radius at this moment and rate of change of surface area at this moment?

Solution:

First of all, let us have a look at the formula:

1.\ V = \dfrac{4}{3}\pi r^3\\2.\ A =4\pi r^2

Now, differentiating the volume and area, we get:

\dfrac{dV}{dt} = \dfrac{4}{3}\times 3 \pi r^2 \dfrac{dr}{dt}\\\Rightarrow \dfrac{dV}{dt} = 4 \pi r^2 \dfrac{dr}{dt}

\dfrac{dA}{dt} = 4\pi \times 2 r \dfrac{dr}{dt}\\\Rightarrow \dfrac{dA}{dt} = 8\pi r \dfrac{dr}{dt}

\dfrac{dV}{dt} = 8 = 4\pi r^2 \dfrac{dr}{dt}\\\Rightarrow 8 = 4\times 3.14 \times 10^2 \dfrac{dr}{dt}\\\Rightarrow 2 =  3.14 \times 10^2 \dfrac{dr}{dt}\\\Rightarrow \dfrac{dr}{dt} = 0.0064\ ft/sec

\dfrac{dA}{dt} = 8\times \pi \times r \dfrac{dr}{dt}\\\Rightarrow \dfrac{dA}{dt} = 8\times 3.14 \times 10 \times 0.0064\\\Rightarrow \dfrac{dA}{dt} = \bold{1.61 \ ft^2/sec}

7 0
3 years ago
What is numerical value?
aniked [119]

Answer: A real number. Absolute value.

Example: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. If a value is an alphanumeric, it contains letters and numbers. 2.

5 0
3 years ago
Read 2 more answers
(-5)-(-4)-(-1) hillllllllbj
Lynna [10]
The answer is zero because -5+4 is -1 and -1 - - 1 is -1 + 1 and that’s 0

5 0
4 years ago
If points c, d, and e are on a line and cd =20 and ce = 32 what are the possible values of de
vivado [14]

In this question it is given that the values of CD and CE are 20 and 32 respectively.

Since the length of CE is greater then of CD, so C and D could not be the end points.

Therefore, either D and E are the endpoints or C and E are the endpoints.

If D and E are the endpoints, then DE is the sum of 20 and 32 which is 52.

And if C and E are the endpoints, then DE is the difference of CE and CD that is 12.

So the possible values of DE are 12 and 52.

6 0
3 years ago
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