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Alona [7]
2 years ago
11

A number, x, rounded to 1 decimal place is 3.7 Write down the error interval for x.

Mathematics
1 answer:
zhuklara [117]2 years ago
6 0

Answer:

3.65 ≤ x < 3.75.

Step-by-step explanation:

Lowest  value = 3.65 and highest is < 3.75.

3.65 ≤ x < 3.75.

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Solve for x 26=3x+2x-9
umka2103 [35]
Combine like terms on the right side:

3x + 2x = 5x
26 = 5x - 9

Add 9 to both sides:

35 = 5x

Divide both sides by 5 to get x by itself:

x = 7

The value of x is 7.


8 0
4 years ago
105,159 rounded to the nearest ten thousand
IceJOKER [234]
If you look at the hundereds place you see it is under the number 5 which means you would drop 1, 5, & 9 and the answer would be 105,000. If the number was above 5 you would have had to make it 106,000.

7 0
3 years ago
Como calcular el 15% de 300
ArbitrLikvidat [17]
300 x .15 y te dará la respuesta
4 0
3 years ago
You are interested in estimating the the mean age of the citizens living in your community. In order to do this, you plan on con
AlladinOne [14]

Using the z-distribution, a sample size of 180 is needed for the estimate.

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

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

The margin of error is given by:

M = z\frac{\sigma}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • z is the critical value.
  • n is the sample size.
  • \sigma is the standard deviation for the population.

In this problem, we have a 98% confidence level, hence\alpha = 0.98, z is the value of Z that has a p-value of \frac{1+0.98}{2} = 0.99, so the critical value is z = 2.327.

The population standard deviation is of \sigma = 23, and to find the sample size, we have to solve for n when M = 4.

Hence:

M = z\frac{\sigma}{\sqrt{n}}

4 = 2.327\frac{23}{\sqrt{n}}

4\sqrt{n} = 2.327 \times 23

\sqrt{n} = \frac{2.327 \times 23}{4}

(\sqrt{n}) = \left(\frac{2.327 \times 23}{4}\right)^2

n = 179.03.

Rounding up, as a sample size of 179 would result in an error slightly above 4, a sample of 180 is needed.

More can be learned about the z-distribution at brainly.com/question/25890103

#SPJ1

8 0
2 years ago
The length of a rectangle is 7x + 5 and the width is 5x - 2 . Cameron cut with side length (2x + 3) from the rectangle . Which e
kotykmax [81]

Answer:

The remaining Area of the Original rectangle is 5x

Step-by-step explanation:

That's what I think it is hope I'm right

3 0
3 years ago
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