What’s -4•9-3=

And the dot is multiplication!

Answer:

24 centimetre

hope it is helpful

It is important to consider the scale of measurement and the specific characteristics of the variables when selecting an appropriate statistical test.The tests can be classified as follows:

1. A researcher measures the proportion of schizophrenic patients born in each season.

This test is nonparametric. The scale of measurement is categorical, as the seasons (spring, summer, fall, winter) represent distinct categories rather than continuous numerical values. Therefore, parametric assumptions, such as normality and equal variances, do not apply to this measurement.

2. A researcher measures the average age that schizophrenia is diagnosed among male and female patients.

This test is parametric. The scale of measurement is continuous and numerical (age in years). Parametric tests, such as t-tests or ANOVA, can be applied when working with continuous data, assuming the data meet the required assumptions (e.g., normality, independence, and equal variances).

3. A researcher tests whether frequency of Internet use and social interaction are independent.

This test can be both parametric or nonparametric, depending on the measurement scale and the specific statistical test used. If the variables are measured on a nominal or ordinal scale, nonparametric tests, such as the chi-square test, would be appropriate. If the variables are measured on a continuous scale, parametric tests, such as logistic regression, could be employed.

4. A researcher measures the amount of time (in seconds) that a group of teenagers uses the Internet for school-related and non-school-related purposes.

This test is parametric. The scale of measurement is continuous (time in seconds), and parametric tests, such as t-tests or ANOVA, can be utilized to compare means or variances, assuming the required assumptions are met.

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Answer: D. The membership increases by 50 members in each of the six warmest months and decreases by 50 members in each of the other six months.

Step-by-step explanation: Because it is a linear function it needs to fluctuate so by using process of elimination D is the only answer that would look like a linear function by having that curved line we are looking for in a function.

The coefficient of the first term of the polynomial is 1.

Polynomials are algebraic expressions of the following form:

f = Σ (cₙ · xₙⁿ)

Where:

The order of the terms of a polynomial is usually from the left to the right. Then, the first term of the polynomial x + 9 · y³ + 4 is x = 1 · x, whose coefficient is equal to 1.

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Answer:

PLS SOMEONE ANSWER MY QUESTION

Step-by-step explanation:

Answer:

13 sides, 1380 degrees

Step-by-step explanation:

180 / 3 =60

so every side is 60 degrees

8 : 1080

+60 =

9 : 1140

+60

10 : 1200

+60

11 : 1260

+60

12 : 1320

+60

13 : 1380

done!

To sketch the curve of the function f(x) = x(x - 4)^3, we can follow these steps: Determine the intercepts:

x-intercept: Set f(x) = 0 and solve for x:

0 = x(x - 4)^3

This gives x = 0 and x = 4 as the x-intercepts.

y-intercept: Set x = 0 and evaluate f(x):

f(0) = 0(0 - 4)^3 = 0

Analyze the behavior around critical points:

Critical point: x = 4 (from the factor (x - 4)^3)

At x = 4, the function changes direction from decreasing to increasing.

Determine the end behavior:

As x approaches positive or negative infinity, the function also approaches positive or negative infinity, respectively. This indicates no horizontal asymptotes.

Sketch the graph:

Start by plotting the intercepts and the critical point on a coordinate plane.

x-intercepts: (0, 0) and (4, 0)

y-intercept: (0, 0)

Critical point: (4, f(4))

Based on the behavior analysis and the shape of the equation, we know that the curve will pass through the x-intercepts and the y-intercept and change direction at the critical point. The curve will resemble a cubic function with a root at x = 4.

The sketch will show a downward curve from the left side, passing through the x-axis at x = 0, reaching its minimum value at x = 4, and then curving upwards towards positive infinity.

Note: It's always helpful to use additional graphing tools or software to get a more accurate representation of the curve.

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Answer:

For question 3b the answer is no because the common difference is 4

Step-by-step explanation:

6,10,14,18,22,26,30,34

It will be 34 not 33

The amount that Martina's offered salary is less than what she requested is $6,500.

To determine how much less Martina's offered salary is compared to her requested salary, we need to calculate the difference between the two amounts.

Martina requested a salary of $500 per week. To calculate her annual requested salary, we can multiply $500 by the number of weeks in a year (52 weeks):

Requested salary = $500/week * 52 weeks/year = $26,000/year

Martina was offered a salary of $19,500 per year. To find the difference between the offered salary and the requested salary, we subtract the offered salary from the requested salary:

Difference = Requested salary - Offered salary

= $26,000 - $19,500

= $6,500

Therefore, the amount that Martina's offered salary is less than what she requested is $6,500.

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Answer:

$85

Step-by-step explanation:

445-20=425 425 ÷5= 85

The correct option for the range of the piecewise function g(x) is (-∞, +∞).

Thus, option (A) is correct.

In the given piecewise function, g(x), we have two parts:

Part 1: g(x) = \(x^2 - 5\) for x < -3

Part 2: g(x) = 2x for x ≥ -3

For Part 1, the function g(x) = \(x^2 - 5\) represents a downward-opening parabola with the vertex at (-∞, -5)

and, the range extending from -5 to +∞.

So, for x < -3, the range is [-5, +∞).

For Part 2, the function g(x) = 2x represents a linear function with a slope of 2.

As x approaches -3 from the right (x ≥ -3), the function extends from -∞ to +∞.

So, for x ≥ -3, the range is (-∞, +∞).

To find the overall range of the piecewise function, take union of the ranges from both parts.

Thus, the overall range is (-∞, +∞).

Therefore, the range is (-∞, +∞).

Thus, option (A) is correct.

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Answer:

15x^4y^3z^2

Step-by-step explanation:

The answer is:

Work/explanation:

The difference is the result of subtracting one number from another one.

So the difference of twice a number and 9 means we subtract twice a number (let n be that number) and 9: 2n - 9

Next, 5 times that difference is 5(2n - 9)

Finally, this equals 7 : 5(2n - 9) = 7

__________________________________________________________

Use the distributive property

\(\sf{5(2n-9)=7}\)

\(\sf{10n-45=7}\)

Add 45 on each side

\(\sf{10n=7+45}\)

\(\sf{10n=52}\)

Divide each side by 10

\(\sf{n=\dfrac{52}{10}}\\\\\\\sf{n=\dfrac{26}{5}}\)

The correct answer is option O: 5 V.

To determine the average voltage (Vavg) given a peak-to-peak voltage (Vpp) of 10 V, we need to consider the relationship between Vavg and Vpp in an alternating current (AC) waveform.

The average voltage of an AC waveform is related to its peak-to-peak voltage by the formula: Vavg = 0.5 * Vpp.

Applying this formula to the given Vpp of 10 V, we can calculate the Vavg as follows: Vavg = 0.5 * 10 V = 5 V.

The average voltage is equal to half of the peak-to-peak voltage, resulting in an average voltage of 5 V for a Vpp of 10 V.

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The error in Han’s thinking is that he takes 0.5 as the power of x instead of coefficient

Polynomial expressions are mathematical statements that are represented by variables, coefficients and operators

The polynomial expression is given as

The product of 10x^4 and 0.5x^3 to get 5x^7

The above implies that

10x^4 x 0.5x^3 = 5x^7

From the question, we have

Han says that 0.5^3 is not a polynomial because 0.5 is not an integer.

The above statement is false, because 0.5 is not a power of x; but instead it is a coefficient

So, the error in Han’s thinking is that he takes 0.5 as the power of x instead of coefficient

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Answer:

The angle swept by the swing is 120 degrees

Step-by-step explanation:

Here, we are given the radius of the circle that makes the arc, and the length of the arc

Mathematically, we are to find the central angle

That would be;

The length of an arc is;

theta/360 * 2 * pi * r

theta is the central angle we are looking for and r in this case is 2.1 m

Thus, we have it that;

theta/360 * 2 * 22/7 * 2.1 = 4.4

theta = (360 * 4.4 * 7)/(2 * 22 * 2.1)

theta = 120 degrees

The possible sources of inaccuracy that could have an impact on your results are -

While conducting a scientific experiment, numerous errors—either systematic or random—could happen.

Thus, more measuring is done when the bias is smaller and more measuring is done when the uncertainty is smaller.

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The CLI option on the MODEL statement of an MLR analysis in PROC GLM produces confidence intervals for the mean response at all predictor combinations in the dataset. b

The CLI option stands for "Confidence Level of Intervals," and it specifies the level of confidence for the confidence intervals produced.

By default, the CLI option is set to 0.95, which means that the confidence intervals produced will have a 95% level of confidence.

These confidence intervals provide a range of values within which the true mean response at a particular combination of predictor values is expected to fall with a specified level of confidence.

They can be useful for assessing the uncertainty associated with the estimated mean response at different combinations of predictor values and for making inferences about the relationships between predictors and the response variable.

The CLI option, which stands for "Confidence Level of Intervals," defines the degree of confidence in the confidence intervals that are generated.

The CLI option's default value of 0.95 designates a 95% degree of confidence for the confidence intervals that are generated.

With a given degree of confidence, these confidence intervals show the range of values within which the real mean response for a specific set of predictor values is anticipated to fall.

They can be helpful for determining the degree of uncertainty surrounding the predicted mean response for various combinations of predictor values and for drawing conclusions on the connections between predictors and the response variable.

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Answer:

jeez human -4+1

Hope this helps

Answer:

x = 2

Step-by-step explanation:

5 ÷ 2 1/2 =

5 x 2/5 = 10/5 = 2

Answer:

I think it is 2

Step-by-step explanation:

5 ÷ 2 1/2 =2

If the plant is n inches then,

the actual plant = 2n feet.

The ratio of the scale of an original thing to a new object that is a representation of it but of a different size is known as a scale factor (bigger or smaller).

Given:

The garden club at central middle school is planting a flower bed.

A scale drawing of the flower is shown.

The scale 1 in:2 ft

The scale factor,

the model = 1 inch

Then the actual plant = 2 feet.

If the plant is n inches then,

the actual plant = 2n feet.

Therefore, If the plant is n inches then, the actual plant = 2n feet.

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In population 1, allele a is being selected for over allele b, while in population 2, allele a has been introduced through gene flow and is also favored by selection.

In population 1, natural selection is likely occurring, which means that certain alleles that provide a reproductive advantage to individuals are being selected for, while others are being selected against. In this case, allele a is being favored over allele b, which could be due to a variety of factors such as environmental conditions or interactions with other genes.

In population 2, it appears that gene flow has occurred, which is the transfer of genetic material from one population to another. This can happen through migration, hybridization, or other means. As a result of this gene flow, allele a has been introduced into population 2.

It is also noted that allele a is favored by selection in population 2. This could be due to a variety of reasons, such as the same environmental conditions as in population 1 or simply because the presence of allele a in population 1 has already provided a selective advantage, which is now also benefiting population 2.

Overall, the combination of gene flow and natural selection in population 2 has allowed allele a to become established and favored, even though it was not present in the population originally. This example demonstrates how genetic processes such as selection and gene flow can shape the genetic composition of populations over time

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Answer:

Amount of loan pay = $6.840 (Approx.)

Step-by-step explanation:

Given:

Amount of loan borrow = $4,500

Rate of interest = 15% = 0.15

Number of year = 3 year

Find:

Amount of loan pay

Computation:

Future value = Present value[1+r]ⁿ

Amount of loan pay = Amount of loan borrow[1+r]ⁿ

Amount of loan pay = 4,500[1+0.15]³

Amount of loan pay = 4,500[1.15]³

Amount of loan pay = 4,500[1.52]

Amount of loan pay = $6.840 (Approx.)

This problem involves finding the probability that the actual costs for maintenance and repairs in a certain electricity company will exceed the budgeted amount of C450.

We can standardize the distribution of the weekly costs using the z-score formula given:

z = (x - μ) / σ

where x is the budgeted amount, μ is the mean, and σ is the standard deviation.

Substituting the given values, we get:

z = (450 - 400) / 20 = 2.5

Using the z-table, we can find the probability that the actual costs will exceed the budgeted amount as:

P(z > 2.5) = 1 - P(z < 2.5)

From the z-table, we find that P(z < 2.5) = 0.9938

Therefore:

P(z > 2.5) = 1 - 0.9938 = 0.0062

Hence, the probability that the actual costs for maintenance and repairs in the electricity company will exceed the budgeted amount of C450 is 0.0062 or approximately 0.62%.

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The variance of the sample mean is 12/35 = 0.3429.. This is a result of uniform distribution.

The uniform distribution is a continuous probability distribution and is concerned with events that are equally likely to occur. When working out problems that have a uniform distribution, be careful to note if the data is inclusive or exclusive.

According to the question, we have

Sample size (n) = 36; uniform continuous distribution has a maximum of 14 and a minimum of 2.

The notation for the uniform distribution is

X U(a,b), where  a=  the lowest value of x  and  b=  the highest value of x. The probability density function is f(x) = 1/(ba ) fo axb .

b = 14 and a = 2.

Variance in uniform distribution = (b-a)² / 12.

Put the value of a and b, 

Variance = ( 14-2)²/12 = 12

Sample variance is used to calculate the variability of sample sets.

The variance of the sample means = variance / (sample size- 1) 9= (b-a)²/ (n-1)

= 12/35= 0.342

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Answer:

\(f'(x)=\displaystyle -\frac{e^x}{(1+e^x)^2}\cos\biggr(\frac{1}{1+e^x}\biggr)\)

Step-by-step explanation:

Recall the power series \(\sin(x)=\displaystyle \sum\limits^\infty_{n=0}(-1)^n\frac{x^{2n+1}}{(2n+1)!}\).

In this case, \(x\) is replaced with \(\displaystyle \frac{1}{1+e^x}\), so our power series actually works out to be \(\displaystyle \sin\biggr(\frac{1}{1+e^x}\biggr) =\sum\limits^\infty_{n=0}(-1)^n\frac{\bigr(\frac{1}{1+e^x}\bigr)^{2n+1}}{(2n+1)!}\)! Amazing, huh?

Now, we find the derivative of the function by using the chain rule:

\(\displaystyle \frac{d}{dx}\sin\biggr(\frac{1}{1+e^x}\biggr)=\frac{d}{dx}\biggr(\frac{1}{1+e^x}\biggr)*\cos\biggr(\frac{1}{1+e^x}\biggr)=-\frac{e^x}{(1+e^x)^2}\cos\biggr(\frac{1}{1+e^x}\biggr)\)

You didn't specify if you just wanted the derivative of the series to be a function or a series, so I'm going to assume you want the function. Let me know if there's more to your problem.

Answer:

Rational Number

Step-by-step explanation:

It is not a natural number as natural numbers are the counting numbers we use and therefore only encompass positive integers,which - 2.75 is not. Whole numbers and integers do not include decimals and fractions, therefore - 2.75 is not included either does to its decimal. Finally it is a rational number because it can be properly expressed as a fraction (-2.75/1). Therefore it is just a rational number from this list.

Hope this helped!