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ankoles [38]
3 years ago
12

What is the radius of the circle shown below? x^2+y^2-2x+6y+9=0

Mathematics
1 answer:
aliina [53]3 years ago
8 0

Answer:

  1

Step-by-step explanation:

The graph below shows the radius to be 1.

__

If we rewrite the equation to standard form, we have ...

  (x^2 -2x +1) +(y^2 +6y +9) = -9 +1 +9

  (x -1)^2 +(y +3)^2 = 1

The square of the radius is 1, so the radius is 1.

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William estimated 140 by placing the point on the number line which is true about his estimate
ziro4ka [17]

Answer:

Step-by-step explanation:

Step-by-step explanation:

Familiarize yourself with perfect squares in the neighborhood of 140:

10^2 = 100

11^2 = 121

12^2 = 144

Note that 140 is much closer to the perfect square than it is to the perfect square 121.  The value of √140 must lie closer to 12 than to 11.

Place a point on the number line about 3/4 of the way from 11 to 12.

8 0
3 years ago
4 people can paint a house in 6 hours.
ahrayia [7]

Answer:

24 hours

Step-by-step explanation:

4 people can do the work in 6 hours

4*6 = 24 work hours

It will take 1 person 24 work hours to complete the job

7 0
3 years ago
Read 2 more answers
To determine the size of a sample, the standard deviation of the population must be estimated by either taking a plot surveying
levacccp [35]

Answer:

a) true

Step-by-step explanation:

6 0
4 years ago
X = -4 -3x + 2y = 4​
Virty [35]
Y =8
3(-4) +2y=4
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+12 +12
2y =4+12=16
2y\2= 16/2
Y= 8 :)
7 0
3 years ago
What term refers to the value that occurs midway in a series of numbers (that is, the middle case)?
Serggg [28]
The median.
Hopes this helps! 
8 0
3 years ago
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