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2 years ago

HELP ME PLEASE FOR BRAINLESTT!!

Mathematics

2 answers:

timurjin [86]2 years ago

7 0

Answer:

See below.

Step-by-step explanation:

The answer is D. The solution is when the two lines intersect, or are satisfied.

-hope it helps

murzikaleks [220]2 years ago

5 0

Answer:

The solution of a system of linear equations is:

D. The values of the variables that satisfy both equations.

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Does the diagram below represent balanced or unbalanced forces

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3 years ago

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g100num [7]

Answer:

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Step-by-step explanation:

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2 years ago

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In a manufacturing process a random sample of 9 bolts manufactured has a mean length of 3 inches with a standard deviation of .3

Serggg [28]

Answer:

The correct option is (C) (2.769, 3.231).

Step-by-step explanation:

The confidence interval for mean when the standard deviation is not known is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\frac{s}{\sqrt{n}}$

Given:

$\bar x = 3\\s=0.3\\n=9\\\alpha =1-0.95=0.05$

Compute the critical value as follows:

$t_{\alpha/2, (n-1)}=t_{0.05/2, (9-1)}=t_{0.025, 8}=2.31$

**Use a <em>t</em>-table.

The 95% confidence interval for true mean length of the bolt is:

$CI=\bar x\pm t_{\alpha/2, (n-1)}\frac{s}{\sqrt{n}}\\=3\pm 2.31\times \frac{0.30}{\sqrt{9}}\\ =3\pm 0.231\\=(2.769, 3.231)$

Thus, the 95% confidence interval for true mean length of the bolt is (2.769, 3.231).

The correct option is (C).

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3 years ago

Calcular los perimetros de las siguientes figuras porfa ayúdenme ya

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Answer:

solo suma todos los valores x+4(3)+(x+x)

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en el tercero x-3+(2x+5)+(2x+5)

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3 years ago

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Since 18 is one twentieth of the angle of a full circle, 360, the circumference is 20 times the arc distance of 15, or 300

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3 years ago