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tamaranim1 [39]
2 years ago
5

Heellllllllllllllllllllppppppppppppppppppppppppppp

Mathematics
1 answer:
tatyana61 [14]2 years ago
4 0
The slope or also known as “m” equals 4/4 or 1 in simplified form.
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Find the minimum sample size necessary to be 99% confident that the population mean is within 3 units of the sample mean given t
SVEN [57.7K]

Answer:

The minimum sample size required is 207.

Step-by-step explanation:

The (1 - <em>α</em>) % confidence interval for population mean <em>μ</em> is:

CI=\bar x\pm z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

The margin of error of this confidence interval is:

MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}

Given:

MOE=3\\\sigma=29\\z_{\alpha /2}=z_{0.01/2}=z_{0.05}=2.576

*Use a <em>z</em>-table for the critical value.

Compute the value of <em>n</em> as follows:

MOE=z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=2.576\times \frac{29}{\sqrt{n}} \\n=[\frac{2.576\times29}{3} ]^{2}\\=206.69\\\approx207

Thus, the minimum sample size required is 207.

3 0
3 years ago
PLEASE HELP ME SOLVE FOR X
jeka57 [31]

Looks like the labeled angle is bisected, in which case we can apply the angle bisector theorem. For this triangle, it says

\dfrac x3=\dfrac{x+2}{x+4}

Solve for x:

x(x+4)=3(x+2)

x^2+4x=3x+6

x^2+x-6=0

(x+3)(x-2)=0

Then either x=-3 or x=2, but since x is a length, it must be positive. So <em>x</em> = 2.

8 0
2 years ago
1/6divid by 5 and I need help for my sis that is 2
elixir [45]

Answer:

The answer is 5/6

Step-by-step explanation:

1/6 x 5 is 5/6. You can do 1 x 5 which is 5. You don't need to multiply anything else. The answer is 5/6

6 0
3 years ago
Which angles are coterminal with 7pi/8?<br><br> Select each correct answer
Oksana_A [137]

Answer:

Step-by-step explanation:

-9pi/8

23pi/8

-25pi/8

I think its.

6 0
3 years ago
Choose the correct simplification of (4x − 3)(3x2 − 4x − 3).
tester [92]
(4x - 3)(3x^2 - 4x - 3) 

=4x\cdot \:3x^2+4x\left(-4x\right)+4x\left(-3\right)-3\cdot \:3x^2-3\left(-4x\right)-3\left(-3\right) 

=4x\cdot \:3x^2-4x\cdot \:4x-4x\cdot \:3-3\cdot \:3x^2+3\cdot \:4x+3\cdot \:3 

\mathrm{Simplify}\:4x\cdot \:3x^2-4x\cdot \:4x-4x\cdot \:3-3\cdot \:3x^2+3\cdot \:4x+3\cdot \:3:\quad 12x^3-25x^2+9 

=12x^3-25x^2+9
8 0
3 years ago
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