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EastWind [94]
3 years ago
11

What is -2.9 = 3f + 4.3

Mathematics
1 answer:
PolarNik [594]3 years ago
8 0

-2.9 = 3f + 4.3\\3f+4.3+2.9=0\\3f+7.2=0\\3f=-7.2\\f=-7.2/3\\f=-2.4

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2 years ago
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The answer is P>9 The number line (if needed is)

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From a random sample of 58 businesses, it is found that the mean time the owner spends on administrative issues each week is 21.
zzz [600]

Answer: (20.86, 22.52)

Step-by-step explanation:

Formula to find the confidence interval for population mean :-

\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}

, where \overline{x} = sample mean.

z*= critical z-value

n= sample size.

\sigma = Population standard deviation.

By considering the given question , we have

\overline{x}= 21.69

\sigma=3.23

n= 58

Using z-table, the critical z-value for 95% confidence = z* = 1.96

Then, 95% confidence interval for the amount of time spent on administrative issues will be :

21.69\pm (1.96)\dfrac{3.23}{\sqrt{58}}

=21.69\pm (1.96)\dfrac{1.7}{7.61577}

=21.69\pm (1.96)(0.223221)

\approx21.69\pm0.83

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Hence, the 95% confidence interval for the amount of time spent on administrative issues = (20.86, 22.52)

7 0
3 years ago
The library has 65,400 art books and 9,600 science book what part off all books are science books?
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2 years ago
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nydimaria [60]

Based on the information given, the number of tokens that will be bought if a child has $20 will be 70.

Since a child can buy 21 tokens for $6, the cost of one token will be:

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Therefore, if a child has $20, the number of tokens that will be gotten will be:

= $20 / $0.2857143

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Therefore, 70 tokens will be bought.

Read related link on:

brainly.com/question/25776703

8 0
2 years ago
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