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4 years ago

So I have a question, this : Insert 2 grouping symbols to make the equation true

Mathematics

1 answer:

kotykmax [81]4 years ago

3 0

Between 4 and 6 is where u put the grouping symbols!

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Which correctly describes a cross section of the right rectangular prism if the base is a rectangle measuring 15 inches by 8 inc

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Answer: 2,3, and the last one.... I think

Step-by-step explanation:

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3 years ago

15%of 250 <br> Pls give and step by step

pychu [463]

Answer:

Step-by-step explanation:

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3 years ago

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4,12,20, 28 nth term

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

Sound City sells the ClearTone-400 satellite car radio. For this radio, historical sales records over the last 100 weeks show 5

Harman [31]

Answer:

μ =2.23

$\sigma_x^2= 1.49$

$\sigma_x=1.22$

Step-by-step explanation:

Radio(x) weeks P(x)

0 5 5/100 = 0.05

1 27 27/100=0.27

2 27 27/100 = 0.27

3 27 27/100 = 0.27

4 9 9/100=0.09

5 5 5/100=0.05

We know that

Mean ,μ

$\mu =\sum x.P(x)$

μ = 0 x 0.05 + 1 x 0.27 + 2 x 0.27 + 3 x 0.27 + 4 x 0 .09 + 5 x 0.05

μ =2.23

$\sigma_x^2= \sum x^2\times P(x)-(\sum x.P(x))^2$

$\sigma_x^2= 0^2\times 0.05+ 1^2\times 0.27+ 2^2\times 0.27+ 3^2\times 0.27+ 4^2\times 0.09+5^2\times 0.05-2.23^2$

$\sigma_x^2= 1.49$

$\sigma_x= \sqrt{\sigma_x^2}$

$\sigma_x=1.22$

7 0

4 years ago