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DIA [1.3K]
2 years ago
15

Which equation represents a circle with a center of (6,-3) and a radius of 4?

Mathematics
2 answers:
Aleksandr [31]2 years ago
7 0

The answer is (x-6)^2+(y+3)^2=4

Troyanec [42]2 years ago
3 0

Answer: (x-6)2 + (y+3)2=4

Step-by-step explanation:

I’m smart like dat cuh

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The factors for x2 + 5x + 6 are x + 2 and x + 3.
Nookie1986 [14]
It is true that (x+2)(x+3) = x2 +5x + 6
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3 years ago
Does anyone know how to turn a fraaction percent into a decimal like this:
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3 divided by 8 and 17 divided by 30
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The probability can be written as:<br> Fraction <br> Decimal <br> Percent <br> All of the above
Alla [95]
All of the above. Sorry if this is wrong but in 99% sure it isn’t!!
5 0
3 years ago
A statistics student would like to estimate the average age of students at her college. she would like to be 85% confident that
Anna11 [10]

A statistics student would like to estimate the average age of students at her college. she would like to be 85% confident that her estimate includes the actual college population mean

It means confidence level is 0.85.

After taking survey the estimate of population standard deviation is found as 4.5 years. The given margin of error is 0.5 years

The sample size is obtained using formula

n= (\frac{z_{\alpha/2} std}{ME} )^{2}

Where std = standard deviation

alpha = 1 -c = 1-0.85 = 0.15

z(α/2) = z(0.15/2) = z(0.075)

It is the critical value of z such that area above z and below -z is 0.075

Use z score table to find the probability exactly or very close to 0.075 and note the corresponding z score value.

In z score table there is no accurate 0.075 probability value. The close value is 0.0749 which corresponds to z score -1.44

For calculation we take positive z score value.

So we get z(α/2) =1.44

Using all the given values into formula

n = [(1.44 * 4.5) / 0.5]^2

n = 167.96

Rounding it to nearest integer we get n=168

The number of people need to surveyed is n=168

7 0
3 years ago
Bill and Annie's ages add up to a total of 30 years. Bill is six years older than twice Annie's age. How old are Bill and Annie?
omeli [17]
Bill is 5 years old and annie is 6 years old so, you multiply 5×6=30
6 0
3 years ago
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