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Viktor [21]
3 years ago
8

Write an algebraic expression to model the unknown number situation. the difference of a number and seven A 1-column table with

5 rows. Column 1 is labeled Subtraction Words with entries decreased by, difference, fewer, less than, subtract. Which statements are true? Select all that apply. You can replace “a number” with a variable to represent an unknown value. You can replace “difference” with a division sign. You can replace “difference” with a subtraction sign. You can replace “seven” with 7. The correct expression is n – 7. The correct expression is 7 – n.
Mathematics
2 answers:
elena55 [62]3 years ago
8 0

Answer

A,C,D and E

Step-by-step explanation:

yulyashka [42]3 years ago
4 0

Answer:

A,C,D,E

Step-by-step explanation:

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The Wall Street Journal reported that automobile crashes cost the United States $162 billion annually (2008 data). The average c
ivanzaharov [21]

Answer:

n=(\frac{2.326(500)}{120})^2 =93.928 \approx 94

So the answer for this case would be n=94 rounded up to the nearest integer

Step-by-step explanation:

Information given

\bar X represent the sample mean

\mu population mean (variable of interest)

\sigma= 500 represent the population standard deviation

n represent the sample size  

Solution to the problem

The margin of error is given by this formula:

ME=z_{\alpha/2}\frac{s}{\sqrt{n}}    (a)

And on this case we have that ME =120 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

n=(\frac{z_{\alpha/2} \sigma}{ME})^2   (b)

The confidence2 level is 98% or 0.98 then the significance level would be \alpha=1-0.98=0.02 and \alpha/2=0.01, the critical value for this case would be z_{\alpha/2}=2.326, replacing into formula (b) we got:

n=(\frac{2.326(500)}{120})^2 =93.928 \approx 94

So the answer for this case would be n=94 rounded up to the nearest integer

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Which exspression is equivalent to :
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