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4 years ago

X + 3y - 2z - w = 5

Mathematics

1 answer:

Sunny_sXe [5.5K]4 years ago

7 0

(x,y,z,w)=(0,2,-3,4) Thats the answer I hope this actually helps your problems and .. good luck! ^^

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(23.01) In a randomized comparative experiment on the effect of dietary calcium on blood pressure, researchers divided 58 health

Paul [167]

Answer:

$113.7-2.154\frac{9.1}{\sqrt{29}}=110.06$

$113.7+2.154\frac{9.1}{\sqrt{29}}=117.34$

And the 96% confidence is given by (110.06; 117.34)

Step-by-step explanation:

Information given

$\bar X=113.7$ represent the sample mean

$\mu$ population mean (variable of interest)

s=9.1 represent the sample standard deviation

n=29 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=29-1=28$

The Confidence is 0.96 or 96%, the significance is $\alpha=0.04$ and $\alpha/2 =0.02$ , and the critical value would be $t_{\alpha/2}=2.154$

Replacing the info we got:

$113.7-2.154\frac{9.1}{\sqrt{29}}=110.06$

$113.7+2.154\frac{9.1}{\sqrt{29}}=117.34$

And the 96% confidence is given by (110.06; 117.34)

5 0

4 years ago

Please answer this ??

Vadim26 [7]

The answer is 24.5. Just plug the numbers in

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3 years ago

Solve for x: 4x^2 + 2(2x + 2)^2 = 100

balu736 [363]

Would it be 4(1)^2+2(2(1)+2)^2=100

8 0

3 years ago

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TriangleA′B′C′ is the image of triangleABC after a dilation.

hammer [34]

Answer:

Step-by-step explanation:

The image A’B’C’ is scaled down by a factor of 1/3

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3 years ago

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Answer:

Step-by-step explanation:

$3+75t-16t^{2} =h\\\\$

we evaluate when t=2

$3+75(2)-16(2)^2=h\\\\3+150-64=h\\\\h=89$

so it's 89 feet

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3 years ago

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