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geniusboy [140]
3 years ago
13

Identify the center and radius of each circle x^2 + y^2 + 4x + 12 - 8 = 0

Mathematics
1 answer:
Elanso [62]3 years ago
8 0

Answer:

we have the centre as:

(−2,0)

radius √12=2√3

Explanation:

The standard equation of a circle is

(x−a)2+(y−b)2=r2

where (a,b)

is the centre, and

r is the radius,

we thus have to complete the square on the given equation.

x2+y2+4x−8=0

rearrange slightly

x2+4+y2−8=0(x2+4+2)+y2−8−22=0(x+2)2+y2−12=0(x+2)2+y2=12

comparing with

(x−a)2+(y−b)2=r2

we have the centre as:

(−2,0)

radius

√12=2√3

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Step-by-step explanation:

Step 1: Solve the fraction

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10/9 x 10/9 = 100/81

Convert fraction to decimals

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At a manufacturing plant where switches are made, it is a known fact that 2% of all switches are defective. If two switches are
olchik [2.2K]

Answer:

The probability that exactly one switch is good is

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6 0
3 years ago
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2 years ago
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lutik1710 [3]
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6 0
3 years ago
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Answer:

Step-by-step explanation:

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