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1 year ago

HELPPPPPPPPPPPPP ME PLEASEEEEEE

Mathematics

1 answer:

julia-pushkina [17]1 year ago

6 0

Answer:

Step-by-step explanation:

x/7 <2

Multiply both sides if the inequality by 7

x/7×7 < 2×7

Then cancel out the 7s from x/7×7 to get x by itself

now

x < 14

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3 1/6 divided by 2 1/9

Natasha_Volkova [10]

3 1/6 = 19/6
2 1/9 = 19/9
19/6 / 19/9 = 19*9/19*6 = 9/6 = 3/2

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2 years ago

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How many solutions exist for the given equation?

katrin2010 [14]

$1(x + 12) = 4x - 1\\x+12=4x-1\\13=3x\\x=\frac{13}{3} \\x=4\frac{1}{3}$

This equation has only one solution

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P.S. Hello from Russia

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2 years ago

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Lesson 9 problem set <br> 5.1

Elodia [21]

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3 years ago

a major metroplitan newspaper selected a simple random sample of 1,600 readers from their list of 100,000 subscribers. they aske

Arisa [49]

Answer:

The 99% confidence interval for the proportion of readers who would like more coverage of local news is (0.3685, 0.4315).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 1600, \pi = 0.4$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4 - 2.575\sqrt{\frac{0.4*0.6}{1600}} = 0.3685$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4 + 2.575\sqrt{\frac{0.4*0.6}{1600}} = 0.4315$

The 99% confidence interval for the proportion of readers who would like more coverage of local news is (0.3685, 0.4315).

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2 years ago

Solve the system of linear equations by elimination. 12x - 7y = -2 8x + 11y = 30

Sergio039 [100]

Answers: (y = 2) and (x = 1)

Steps:

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3 years ago