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lubasha [3.4K]
3 years ago
14

Solve for x. 4≥10−7x x≥−2 x≤−2 x≥2 ( I think this is the correct answer) x≤2

Mathematics
2 answers:
Allisa [31]3 years ago
6 0
<span>= -4 ≥ 10 − 7x         [ changed 4 to -4 on the request of questioner ]
Subtract 10 from both sides, 
= -4 - 10 </span>≥ -7x + 10 - 10
= -14 ≥ -7x

Divide both sides from -7, 
= -14/-7 ≤ -7x/-7    [ sign changed as we use "-" here ]
= x ≥ 2

In short, Your Answer would be x ≥ 2 which is Option C

Hope this helps!
Sloan [31]3 years ago
6 0
<span>4 ≥ 10−7x

Place like terms together

7x </span><span>≥ 10 - 4</span>

7x <span>≥ 6

x </span><span>≥ 6/7

The answer is  </span>x <span>≥ 6/7

Cross check the question properly and go through the steps.
</span>
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Natalka [10]

Using the t-distribution to build the 99% confidence interval, it is found that:

  • The margin of error is of 3.64.
  • The 99% confidence interval for the population mean is (19.36, 26.64).

<h3>What is a t-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm t\frac{s}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • t is the critical value.
  • n is the sample size.
  • s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed 95% confidence interval, with 21 - 1 = 20 df, is t = 2.086.

The other parameters are given as follows:

\overline{x} = 23, s = 8, n = 21

The margin of error is given by:

M = t\frac{s}{\sqrt{n}} = 2.086\frac{8}{\sqrt{21}} = 3.64

Hence the bounds of the interval are:

\overline{x} - M = 23 - 3.64 = 19.36

\overline{x} + M = 23 + 3.64 = 26.64

The 99% confidence interval for the population mean is (19.36, 26.64).

More can be learned about the t-distribution at brainly.com/question/16162795

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7 0
2 years ago
(6 1/3-1/6x 36=?<br> 221/6<br> 216<br> 222<br> 242
scoundrel [369]

Answer:

<em>-(6 1/3-1/6x 36=216</em>

Hope I helped

8 0
3 years ago
Plz help me solve problems 9 and 10 thxxxxx I appreciate it
Olegator [25]
Question 9 answer is 0.375
Question 10 answer is 0.03125
8 0
3 years ago
Roberto decorates retangular signs. One sign is 2/3 foot long and 1/4 foot wide. Another sign is 1/2 long and 1/3 foot wide. It
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Answer:

It'll take him 1/4 hours to decorate the two signs.

Step-by-step explanation:

In order to know how long Roberto will take to decorate all the signs we need to find their surface area, since they're rectangular their area is given by the product of their dimensions.

First sign:

area1 = (2/3)*(1/4) = 2/12 = 1/6 foot²

Second sign:

area2 = (1/2)*(1/3) = 1/6 foot²

The total area he has to paint is the sum of their individual areas, so we have:

total area = area1 + area2 = 1/6 + 1/6 = 2/6 = 1/3 foot²

To find out how long he'll take to decorate this area we can use a rule of three as shown bellow:

3/4 hour -> 1 foot²

x hour -> 1/3 foot²

x = (3/4)*(1/3) = 1/4 hours

3 0
4 years ago
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Answer:

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Step-by-step explanation:

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