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V125BC [204]
3 years ago
6

If × = 6 what is 5×-(3+9)

Mathematics
2 answers:
Nadya [2.5K]3 years ago
5 0
The answer is 18 because 5x6 is 30 and 9+3=12 and 30-12 is 18
olga nikolaevna [1]3 years ago
4 0
<span> 5×-(3+9)
Substitute 6 for x
5(6)-(3+9)
Add 9 to 3
5(6)-12
Multiply 5 by 6
30-12
Final Answer: 18</span>
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The diameters of bolts produced in a machine shop are normally distributed with a mean of 5.71 millimeters and a standard deviat
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Answer:

The bolts with diameter less than 5.57 millimeters and with diameter greater than 5.85 millimeters should be rejected.

Step-by-step explanation:

We have been given that the diameters of bolts produced in a machine shop are normally distributed with a mean of 5.71 millimeters and a standard deviation of 0.08 millimeters.    

Let us find the sample score that corresponds to z-score of bottom 4%.  

From normal distribution table we got z-score corresponding to bottom 4% is -1.75 and z-score corresponding to top 4% or data above 96% is 1.75.

Upon substituting these values in z-score formula we will get our sample scores (x) as:

z=\frac{x-\mu}{\sigma}

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Therefore, the bolts with diameters less than 5.57 millimeters should be rejected.

Now let us find sample score corresponding to z-score of 1.75 as upper limit.

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1.75*0.08=x-5.71

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Therefore, the bolts with diameters greater than 5.85 millimeters should be rejected.

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Learn more about Triangle:

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