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Free_Kalibri [48]
2 years ago
10

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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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).

7 0
3 years ago
Calcular los perimetros de las siguientes figuras porfa ayúdenme ya​
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Answer:

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

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If the distance between two points (ab) on a circle is 15 cm and the angle between those two cities is 18˚, what is the circumfe
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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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