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Neporo4naja [7]
3 years ago
11

Please help me with this statistics question!!

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
4 0

a statistic question is with multiple answers

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Solve number 8 please
beks73 [17]

Answer:

see explanation

Step-by-step explanation:

the equation of a circle in standard form is

(x - h)² + (y - k )² = r²

where (h, k ) are the coordinates of the centre and r is the radius

given

x² + y² - 8x + 8y + 23 = 0

collect the x and y terms together and subtract 23 from both sides

x² - 8x + y² + 8y = - 23

using the method of completing the square

add ( half the coefficient of the x / y terms )² to both sides

x² + 2(- 4)x + 16 + y² + 2(4)y + 16 = - 23 + 16 + 16

(x - 4)² + (y + 4)² = 9 ← in standard form

with centre = (4, - 4 ) and r = \sqrt{9} = 3

this is shown in graph b

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1 year ago
Biologists want to know how many fish are in a certain lake. On January 1, they removed 430 fish from the lake and tagged them.
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3 years ago
This is my hardest one so far. plz help.
SVETLANKA909090 [29]

x - 27 = 62 → ( add 27 to both sides )

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x = 89

drag first box then box with x = 89


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