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Brrunno [24]
3 years ago
13

According to a 2015 Census Bureau survey, 75,511 of the 822,959 residents of Baltimore County, Maryland, were enrolled in colleg

e. Consider a sample of 800 residents of Baltimore County, Maryland in 2015 selected at random. Which of the following is closest to the expected value of the number in the sample enrolled in college?
Mathematics
1 answer:
quester [9]3 years ago
6 0

Answer:

73.4

Step-by-step explanation:

-Given that 75,511 out of 822,959  residents enrolled in the college, the probability of success  is calculated as:

P_{enrollment}=\frac{Enrollment}{Total \ Residents}\\\\=\frac{75511}{822959}\\\\=0.09176\\\\p=0.09176

#We know that this is a binomial distribution with p=0.09176 and n=800, Expected value is calculated as:

E(X)=np, n=800, p=0.09176\\\\=0.09176\times 800\\\\=73.4

Hence the expected value E(X)=73.4

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Answer:

17.5%

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Use the quadratic formula to find the solutions to the equation x^2-3x+1=0
Gnom [1K]

Answer:

x_{1}=\frac{+3+\sqrt{5} }{2}\\\\x_{2}=\frac{+3-\sqrt{5} }{2}

Step-by-step explanation:

Using:

x=\frac{-b+-\sqrt{b^{2}-4*a*c} }{2*a}

we will have two solutions.

x^2-3x+1=0

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x_{1}=\frac{+3+\sqrt{-3^{2}-4*1*1} }{2*1}\\\\x_{2}=\frac{+3-\sqrt{-3^{2}-4*1*1} }{2*1}

We have two solutions:

x_{1}=\frac{+3+\sqrt{5} }{2}\\\\x_{2}=\frac{+3-\sqrt{5} }{2}

4 0
3 years ago
What is the equation for a line passing through (-2,3) and perpendicular to y= -1/2+1 ?
nata0808 [166]

Answer:

y=2x+7

Step-by-step explanation:

<u><em>The correct question is</em></u>

what is the equation for a line passing through (-2,3) and perpendicular to y= -1/2<em>x</em>+1 ?

Remember

If two lines are perpendicular, then their slopes are opposite reciprocal (the product of their slopes are equal to -1)

The slope of the given line is m=-1/2

so

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we have

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substitute

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Favorite chip Answers v

Step-by-step explanation:

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3. How many said BBQ was their favorite?62/100 or 31/50 or 62%

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alukav5142 [94]

Answer:

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Now the selling price of the iPad including VAT

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