2 years ago

Which expression results in a rational number?

Mathematics

2 answers:

Elodia [21]2 years ago

8 0

Answer:

the fourth expression is a rational

natulia [17]2 years ago

3 0

the fourth expression is a rational

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bonufazy [111]

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Step-by-step explanation:

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1 year ago

During the summer , you want to earn at least $150 per week. You can earn$10 per hour working for a farmer, and $5 per hour baby

almond37 [142]

X = nr. hrs working for a farmer;
y = nr. hrs. babysitting;
x + y <= 25;
10x + 5y >= 150

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3 years ago

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Construct the 95% confidence interval for the population mean using the appropriate distributions. a. A random sample of 50 peop

SSSSS [86.1K]

Answer: 95% confidence interval would be (26.01,29.39).

Step-by-step explanation:

Since we have given that

n = 50

Mean = 27.7

Standard deviation = 6.12

We need to construct 95% confidence interval for the population.

so, z = 1.96

So, it becomes,

$\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=27.7\pm 1.96\times \dfrac{6.12}{\sqrt{50}}\\\\=27.7 \pm 1.69\\\\=(27.7-1.69,27.7+1.69)\\\\=(26.01,29.39)$

Hence, 95% confidence interval would be (26.01,29.39).

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3 years ago

When she just turned 22, Rae purchased 145 shares of Stock A for $25 per share; 87 shares of Stock B for $38 per share; 46 share

Damm [24]

Answer:

170

Step-by-step explanation:

you have to divide

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2 years ago

If half of Allen's test score plus 8 equals 50. What did Allen score on his test? Let s, represent Allens score.

dmitriy555 [2]

50-8=42(half of his score)
42*2=84(whole score)
s=84

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2 years ago