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MA_775_DIABLO [31]
3 years ago
14

One less than five times a number is fewer than twenty-four

Mathematics
2 answers:
Natasha2012 [34]3 years ago
5 0

1-5x<24

x is equel to or more than 5

Lana71 [14]3 years ago
3 0

1 - 5x < 24

Hope this helps you

Brainliest would be appreciated

-AaronWiseIsBae

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A sample of 50 drills had a mean lifetime of 12.17 holes drilled when drilling a low-carbon steel. Assume the population standar
zmey [24]

Using the z-distribution, it is found that the 95% confidence interval for the mean lifetime of this type of drill, in holes drilled, is (10.4, 13.94).

We are given the <u>standard deviation for the population</u>, hence, the z-distribution is used. The parameters for the interval is:

  • Sample mean of \overline{x} = 12.17
  • Population standard deviation of \sigma = 6.37
  • Sample size of n = 50.

The margin of error is:

M = z\frac{\sigma}{\sqrt{n}}

In which z is the critical value.

We have to find the critical value, which is z with a p-value of \frac{1 + \alpha}{2}, in which \alpha is the confidence level.

In this problem, \alpha = 0.95, thus, z with a p-value of \frac{1 + 0.95}{2} = 0.975, which means that it is z = 1.96.

Then:

M = 1.96\frac{6.37}{\sqrt{50}} = 1.77

The confidence interval is the <u>sample mean plus/minutes the margin of error</u>, hence:

\overline{x} - M = 12.17 - 1.77 = 10.4

\overline{x} + M = 12.17 + 1.77 = 13.94

The 95% confidence interval for the mean lifetime of this type of drill, in holes drilled, is (10.4, 13.94).

A similar problem is given at brainly.com/question/22596713

6 0
3 years ago
Find the area of a circle with a diameter of 16 inches. Use 3.14 for pi.
Daniel [21]

Answer:

200.96‬

Step-by-step explanation:

A = πr²

A = 3.14 x 8²

A = 3.14 x 64

A = 200.96‬

7 0
3 years ago
Read 2 more answers
PLEASE HELP!!! thank you :)
IRINA_888 [86]

Answer:

(0,20) (16,8) (8,4) so A

Step-by-step explanation:

By default it is dilating centered at the origin because not specified. Therefore you just multiply every coordinate by the scale factor, in this case 2. Hope this helped!

6 0
3 years ago
Read 2 more answers
ABCD is a parallelogram. Find the values of x and y. Solve for the value of z, if z=x−y.
slava [35]

Answer:

C

Step-by-step explanation:

Parallel and opposite sides of a parallelogram are equal. Hence, we can say:

x + 30 = 2x - 10

and

2y-10 = y +10

Solving first one, we get:

x + 30 = 2x - 10

30+10 = x

x = 40

Also

2y - 10 = y + 10

y = 10 + 10

y = 20

Now, z = x - y, so

z = 40 - 20 = 20

Answer C is right.

3 0
3 years ago
Please Help!! <br> I really need to pass
sesenic [268]

Answer:

None of these

Step-by-step explanation:

The lines aren't parallels so none of these property's can be applied

5 0
3 years ago
Read 2 more answers
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