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3 years ago

The area of the circle is 132.7 square centimeters. What is the diameter

1 answer:

7 0

Equating the formula (d is the diameter)

$\pi$ d^2/4 = 132.7
d^2 = 132.7*4/ $\pi$
d = $\sqrt{169.044586}$
d = 13.0017147331
d= 13cm

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4 * x² - (6+y) when x = -2 and y = -9

aalyn [17]

Answer:

4 * (-2)^2 - (6+(-9))

= 4 * 4 - (-3)

= 16 - (-3)

= 16 + 3

= 19

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2 years ago

Write the standard form of the equation of the circle described below.

Luden [163]

Equation of circle is $x^2+(y+2)^2=26$

Step-by-step explanation:

The standard form of the equation of circle is:

$(x-h)^2+(y-k)^2=r^2$

where (h,k) is the center of the circle and r is the radius of circle.

We need to find the radius of circle r by using distance formula:

$r=d=\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2}\\r=d=\sqrt{(-5-0)^2+(-1-(-2))^2}\\r=d=\sqrt{(-5)^2+(1)^2}\\r=d=\sqrt{25+1}\\r=d=\sqrt{26}$

r=√26

and r^2= 26

Putting values of r^2=26 and value of center (h,k)=(0,-2)

the equation of Circle is:

$(x-h)^2+(y-k)^2=r^2\\(x-0)^2+(y-(-2)^2=26\\x^2+(y+2)^2=26$

Keywords: Equation of circle

Learn more about Equation of circle at:

#learnwithBrainly

4 0

3 years ago

David conducted a study of how many college students consume coffee everyday. What type of study is this and why?

Hitman42 [59]

Answer: David conducted (an observational study) because (it studies human behavior) and (the sample is not manuipulated).

Step-by-step explanation:

hope this helps! (:

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3 years ago

Find the Volume of this Prism

Dovator [93]

2400cm. Because it is a triangular prism and with that you need to multiply the different ones and get 2400

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3 years ago

Read 2 more answers

The sum of sixfifths of a number and 2 is 14

CaHeK987 [17]

Answer:

six fifths= 6/5

let the number be g.

Then; 6/5 (g) + 2 = 14.

6g/5 + 2 = 14.

Multiply through by 5.

(6g/5)*5 + 2(5) = 14(5)

6g + 10 = 60

6g = 60 - 10

6g = 50

g = 50/6

8 0

3 years ago