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3 years ago

8(-2+ 7) + 10(7n + 4)

Mathematics

2 answers:

bulgar [2K]3 years ago

7 0

Answer:

70n + 80

Step-by-step explanation:

You need to multiply the numbers in the parentheses first then you can simplify.

Can I have BRAINLIEST please?

Hope this helps!

Effectus [21]3 years ago

4 0

Answer:

70n+80

Step-by-step explanation:

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Answer:

Step-by-step explanation:

Given that,

μ = 25.1

σ = 0.26

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Chart is more appropriate than $\bar x$ and R - chart for controlling process average and variability

so we use

$\bar x \\\text {and}\\\mu$ charts

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so, control unit for $\bar x$ chart are

upper control limit = $\mu +2\times\frac{ \sigma}{\sqrt{n} }$

lower control limit = $\mu -2\times\frac{ \sigma}{\sqrt{n} }$

control limit = μ

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upper control limit =

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lower control limit =

$25.1-2\times \frac{0.26}{\sqrt{11} } \\\\=24.9432$

Upper control limit and lower control limit are in between the specification limits , that is in between 24.9 and 25.6

so, process is in control

c) if we use 3 sigma limit with n = 11

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lower control limit = $\mu -2\times\frac{ \sigma}{\sqrt{n} }$

$25.1-3\times\frac{0.26}{\sqrt{11} } \\\\=24.8648$

control limit is 25.1

Then, process is in control since upper control limit and lower control limit lies between specification limit

So, process is in control

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