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2 years ago

3n-(2 + n) what value makes this expression equal to 6? A.5 B.6 C.3 D.4

2 answers:

6 0

The answer is D. If you substitute those values for n, you should be able to find that 4 makes the expression equal to 6.

Ne4ueva [31]2 years ago

6 0

<span>3n-(2 + n)
= 3n - 2 - n
= 2n - 2

if this </span>2n - 2 equal to 6 then

2n - 2 = 6
2n = 8
n = 4

answer
<span>D.4</span>

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Answer:

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Step-by-step explanation:

The phrase that starts with "if" is the hypothesis for conditional statement. The phrase that starts with "then" is conclusion for the statement.

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3 years ago

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2 years ago

A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which are defective. Step 2 of 2 :

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Answer:

The 80% confidence interval for the population proportion of disks which are defective is (0.059, 0.079).

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

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This means that $n = 1067, \pi = \frac{74}{1067} = 0.069$

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The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.069 - 1.28\sqrt{\frac{0.069*0.931}{1067}} = 0.059$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.069 + 1.28\sqrt{\frac{0.069*0.931}{1067}} = 0.079$

The 80% confidence interval for the population proportion of disks which are defective is (0.059, 0.079).

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2 years ago

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2 years ago

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professor190 [17]

Total amount of fencing
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2 years ago