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juin [17]
3 years ago
11

Select the equation that represents the problem. Let × represent the unknown number.

Mathematics
2 answers:
skad [1K]3 years ago
7 0
Ddddd ddddddd ddddd dddd
kondor19780726 [428]3 years ago
5 0

Answer:

the is option d cause big number is divided by small ones.

Step-by-step explanation:

hope it's right

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MARKING BRAINLIEST
xz_007 [3.2K]

Answer:

secondary

Step-by-step explanation:

mixing two primary colors together always makes a secondary

6 0
2 years ago
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Unoccupied seats on flights cause airlines to lose revenue. Suppose a large airline wants to estimate its mean number of unoccup
Mkey [24]

The given sample's 95% confidence interval is 11.6 ± 0.5357. I.e., from the lower bound 11.06 to the upper bound 12.14. Its margin error is 0.5357.

<h3>How to find the confidence interval?</h3>

To find the confidence interval C.I,

  • Determine the mean(μ) of the sample
  • Determine the standard deviation(σ)
  • Determine the z-score for the given confidence level using the z-score table
  • Using all these, the confidence interval is calculated by the formula,  C. I = μ ± z(σ/√n) where n is the sample size and z(σ/√n) gives the margin error. So, we can also write C. I = mean ± margin error.

<h3>Calculation:</h3>

It is given that,

Sample size n = 225

Sample mean μ = 11.6

Standard deviation σ = 4.1

Since 95% confidence interval, z-score is 1.96

So, the required confidence interval is calculated by,

C. I = μ ± z(σ/√n) or mean ± margin error

On substituting,

C. I = 11.6 ± 1.96(4.1/√225)

     = 11.6 ± 1.96 × 0.2733

     = 11.6 ± 0.5357

So, the lower bound = 11.6 - 0.5357 = 11.065 and

the upper bound = 11.6 + 0.5357 = 12.135.

Thus, the confidence interval is from 11.06 to 12.14, and its margin error is 0.0537 for the population mean number of unoccupied seats per flight.

Learn more about confidence intervals here:

brainly.com/question/16236451

#SPJ4

3 0
2 years ago
Which formula is best used to prove that a figure has congruent sides?
Mazyrski [523]

Answer:

D

Step-by-step explanation:

Congruent sides mean that they have "EQUAL" lengths.

So, to prove to sides are congruent means that their lengths are equal.

Slope gives the slope of a line. So this can't be it.

Area gives the area of figure. Nothing to do with congruency of 2 lines.

Midpoint formula gives the coordinates of the midpoint. Nothing here.

Distance formula gives the length of sides. So, this is the one we can use to prove that a figure has congruent sides. We can place the figure in coordinate system and find the length of 2 respective sides using "distance formula"

Correct answer is D

3 0
3 years ago
What is the surface of the figure?<br><br> A. 136<br> B. 234<br> C. 236<br> D.246
Salsk061 [2.6K]
Is B. 224 in^2

2•(4•10+3•5)+3•10•2+(9•3)+(3•5)+(3•4)=224
3 0
3 years ago
All of the following expressions are equivalent except _____.
s2008m [1.1K]

Answer:

1.) x-7

Step-by-step explanation:

hope it helps

4 0
3 years ago
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