helppppppppppppppppppppppp please

Given that sample standard deviation is zero. This indicates that the variance of sample is also zero as square of sample standard deviation is sample Variance. Variance is average of the squared deviations from mean. As shown in below formula

Since Variance = 0 , we substitute in formula and we get the sum of squares of deviations of all data points from mean should be zero. This is only possible if and only if all the data points in the data distribution are same as mean of the data distribution. In the case the variance and standard deviation will be zero.

Variance = Summation n to i = 1 \(\frac{(X_{1-X} )^2}{n-1}\)

        0 = Summation n to i = 1\(\frac{(X_{1-X} )^2}{n-1}\)

                Summation n to i \({(X_{1-X} )^2\) = 0

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Steps to solve:

3.9x + 1.4 = 17

~Subtract 1.4 to both sides

3.9x = 15.6

~Divide 3.9 to both sides

x = 4

Best of Luck!

We need to determine the convergence or divergence of the sequence with the given nth term.

if the sequence converges, find its limit. (if the quantity diverges, enter diverges.) an = sin(n) / n.

The limit of a function f(x) is L if, for any ε > 0, there is a positive integer N such that if n > N, then |f(n) - L| < ε.

It follows that if f(n) converges to L then f(n) is a bounded sequence,

i.e. there exists a constant M such that |f(n)| < M for all n. But if f(n) is unbounded then it does not converge to any real number.

So we need to check if the given sequence is bounded or not. We can take n = 2kπ where k is a positive integer. This sequence takes values of sin(n) between -1 and 1 infinitely often,

so, this sequence is unbounded and does not converge to any real number.

Therefore, the given sequence diverges. Hence the answer is "diverges".

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Equation V + Iwh , I = 32, w = 14, and h = 7, V = -3,136. The correct answer is B.

To solve for V in the equation V + Iwh, we can plug in the given values of I, w, and h, and then isolate V on one side of the equation. Here are the steps:

1. V + Iwh = V + (32)(14)(7)
2. V + 3,136 = V + 3,136
3. Subtract 3,136 from both sides of the equation: V = -3,136

The correct answer is option B: 3,136. Here is the solution in HTML format:

To solve for V in the equation V + Iwh, we can plug in the given values of I, w, and h, and then isolate V on one side of the equation. Here are the steps:

V + Iwh = V + (32)(14)(7)
V + 3,136 = V + 3,136
Subtract 3,136 from both sides of the equation: V = -3,136

The correct answer is option B: 3,136.

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Answer:

0

Step-by-step explanation:

ny^2 + 2y - 4 = 0

ny^2 + 2y = 4

y(ny + 2) = 4

y = 4

ny + 2 = 4

ny = 2, 0 = 2

The only possible solution to make this expression incorrect is if 0 = 2, so n is equal to 0.

Answer:  x = 13, and the angle measures are 131, 49, 131, 49.

Step-by-step explanation:

7x + 40 = 10x + 1

40 = 3x + 1

39 = 3x

x = 13

The obtuse angle is 131, and the acute one is 49.

Answer:

9 x 1/12 = 4 1/2.

Step-by-step explanation:

Times 9 by 1/2.

The simplified expression is 3(x√2 + √x), which means that the answer is (C) x²√2.

In mathematics, an expression is a combination of numbers, variables, operators, and functions that can be evaluated to produce a numerical value or another mathematical object such as a polynomial, equation, or inequality.

We can simplify the given expression by factoring out the greatest perfect square factor under each square root symbol. For the first term, √18x³, we can factor out √9x², which is 3x√2. For the second term, √9x, we can factor out √9, which is 3. Thus, we have:

√18x³ + √9x = √(9x²⋅2x) + √(9⋅x) = 3x√2 + 3√x

We can then factor out 3 from both terms:

√18x³ + √9x = 3(x√2 + √x)

Therefore, the simplified expression is 3(x√2 + √x), which means that the answer is (C) x²√2.

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The x-coordinate of the x-intercept of line k is -5/2.

Since this point lies on the x-axis, its y-coordinate is 0.

Given that the line has a y-intercept at the point (0, p), where p is a positive constant. This means that when x = 0, y = p.

As we know that the equation of the line can be written as y = mx + b, where m is the slope and b is the y-intercept.

Here, the slope is the negative of the fraction 2p/5, so the equation of line k is y = -2p/5 x + p.

Substitute y = 0 into the equation and solve for x:

0 = -2p/5 x + p

Subtract p from both sides and then multiply by 5/(-2p):

-2p/5 x = -p

x = (-p)(5/2p)

x = -5/2

Therefore, the x-coordinate of the x-intercept of line k is -5/2.

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Answer:

y = 22 2/3

x = 20

Step-by-step explanation:

y = 0, 4, 8, 12, 16, 20, 24

x = 3, 6, 9, 12, 15, 18, 21

Answer:

\(x^{2}+y^{2}-x\)

Step-by-step explanation:

combine like terms:

(3x²+2y²-3x) ₋ (2x²+y²- 2x)

3x² - 2x² = 1x² = x²

2y² - y² = 1y² = y²

(-3x) - (-2x) = -1x = -x

x² + y² -x

If the target behavior is recorded whenever it occurs at any point within the scoring interval, the measurement procedure used is called continuous recording or event recording. This method involves observing and recording each instance of the behavior without considering its duration or intensity.

Continuous recording is typically used when the target behavior is discrete and occurs relatively infrequently or has a short duration. With this measurement procedure, each occurrence of the behavior is recorded as a separate event, regardless of when it starts or ends within the scoring interval. Examples of behaviors that can be measured using continuous recording include vocalizations, hand clapping, or instances of aggression.

Continuous recording provides a comprehensive account of the frequency or rate at which the behavior occurs, allowing for a detailed analysis of its occurrence patterns. This method is particularly useful when a precise count of behavior instances is needed and when the duration or intensity of the behavior is not a focus of measurement.

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The graph below models the price of items after 120% markup at a small shop. Based only on the given graph, The function's domain is numbers between 5 and 30.

What is graph?

A graph is a structure that resembles a set of items in discrete mathematics, more specifically in graph theory, in which some pairs of the objects are conceptually "connected." The items are represented by mathematical abstractions known as vertices (sometimes known as nodes or points), and each pair of connected vertices is known as an edge (also called link or line).

A graph is typically shown diagrammatically as a collection of dots or circles representing the vertices and lines or curves representing the edges. One of the topics studied in discrete mathematics is graphs.

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Complete Question:

98.8 - 73.3 = 25.5 or

73.3 - 98.8 = -25.5

Answer:

11.74

Step-by-step explanation:

I hope this helps you

Answer:

$9.99

Step-by-step explanation:

The goal is to get d all by itself. To do that first subtract 5.22 on both sides. Then you have 3d=29.97. Then you need to get rid of the 3. Divide the 3 on both sides to get d=9.99. D represent a dozen, so one dozen bagels equals $9.99.

The standard form of the given numbers is 207360 × 10¹⁷.

The number system is a way to represent or express numbers.

A decimal number is a very common number that we use frequently.

Since the decimal number system employs ten digits from 0 to 9, it has a base of 10.

Any of the multiple sets of symbols and the guidelines for utilizing them to represent numbers are included in the Number System.

Given the numbers is  (5 x 1,000,000) (6 x 100,000) (4 x 10,000) (8 x 1,000) (3 x 100) (2 x 10) (4 x 0.1) (9 x 0.001)

Now standard form means we need to write the exponents form.

So,

5 x 6 x 4 x 8 x 3 x 2 x 4 x 9 = 207360

And

1,000,000 x  100000 x 10000 x 1000 x 100 x 10 x 0.1 x 0.001 = 10¹⁷

So, combine 207360 x  10¹⁷

Hence "The standard form of the given numbers is 207360 × 10¹⁷".

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Answer:

Step-by-step explanation:

Divide (157 riders) by (18 riders/ride):  8.72 groups of 18 riders.  This can be interpreted as "8 full groups of 18 riders PLUS 0.72(18 groups), or 12.96 riders"  which rounds off to "8 full groups of 18 riders PLUS just under 13 riders in an additional group"

In summary:

8 full groups of 18 riders,

plus, additionally,  

less than a full group of riders, namely, 13 riders.

Note that 8(18) + 13 = 157.  This checks out correctly.

You should spend 30 minutes on the elliptical trainer and 10 minutes on the stationary bike.

To solve this problem, we need to set up a system of equations. The first equation will represent the total time spent on the elliptical trainer, and the second equation will represent the total time spent on the stationary bike.

The first equation is: 8x + 6y = 300

The second equation is: x + y = 40

We can solve for x and y using either substitution or elimination. Let's use substitution.

First, we can solve for y in the second equation: y = 40 - x

Then, we can substitute this expression for y in the first equation: 8x + 6(40 - x) = 300

This simplifies to: 8x + 240 - 6x = 300

Combining like terms gives us: 2x = 60

Dividing both sides by 2 gives us: x = 30

Now, we can substitute this value for x in the second equation to find y: y = 40 - 30 = 10

So, you should spend 30 minutes on the elliptical trainer and 10 minutes on the stationary bike.

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Answer:

50

Step-by-step explanation:

For this you just have to divide 804 by 16 which gets you a total of 50.25 then just round that to 50

Answer:

Right scalene

Step-by-step explanation:

Answer:

70.5

Step-by-step explanation:

Set of Data (Prioritized):

31, 43, 47, 58, 63, 68, 69, 72, 77, 84, 84, 84, 94, 97

To find the median:

(69 + 72) ÷ 2

= 70.5

Therefore, the median is equal to 70.5.

To calculate grade percentages, you must know the score you received on the particular assignment or test. You must also know the total points possible. Divide the score you received by the total points possible. That is your grade percentage.

To calculate grade average, add up all of your total scores. Then, add up all of the total points possible. Divide the sum of your total scores by the total points possible. That is your grade average.

Divide the score you received by the total points possible.

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Answer:

4

Step-by-step explanation:

For the first triangle which is triangle <KJL

Hypotenuse= 8✓2

Angle=30°

Opposite = ?

Therefore we will use Sine formula

Sin30° = Y/8✓2

Y=4✓2

For the second triangle which is triangle <JML

Hypotenuse= 4✓2

Opposite=X

Angle=45°

Therefore we will use Sine formula again

Sin45°=X/4✓2

X=4

Answer:

Step-by-step explanation:

ΔJKL is half of equilateral triangle and ΔJML is half of square.

We can use properties of these triangles (picture):

m∠KJL=90° and m∠JKL = 30° ⇒  JL = 0.5KL = 0.5•8√2 = 4√2

m∠JML=90° and m∠MJL = 45° ⇒  JL = ML√2

                                                        4√2 = x√2

                                                             x = 4

The population decreased by 5,400 people from 2015 to 2020.

Also known as population decline, means the reduction in a human population size

Population in 2015 = Population in 2010 + Growth from 2010 to 2015

Population in 2015 = 167,000 + (8% of 167,000)

Population in 2015 = 167,000 + 13,360

Population in 2015 = 180,360

Population in 2020 = Population in 2015 - Decrease from 2015 to 2020

Population in 2020 = 180,360 - (3% of 180,360)

Population in 2020 = 180,360 - 5,411.8

Population in 2020 = 174,948.2

The population decrease from 2015 to 2020 is:

= Population in 2015 - Population in 2020

= 180,360 - 174,948.2

= 5,411.8

= 5,400 to nearest 100 people.

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The factorized expression of -18y - 27 after taking GCF -9 as common is -9 (2y + 3). The blanks can be filled as -9 x 2y = -18y, -9 x 3 = -27.

The biggest positive number that divides each of the two or more non-zero integers is known as the greatest common divisor.

Given:

The expression is shown below,

-18y - 27

Factorize the constant 18 and 27 as shown below,

18 = 9 × 2

27 = 9 × 3

GCF = 9

Take the GCF common from the expression,

-9 (2y + 3) (Take the negative sign common)

Thus, the expression is -9 (2y + 3).

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The correct option is option (b). The percent overall error rate for the given confusion matrix is approximately 37.5%.

In the confusion matrix, the diagonal elements represent the correct predictions, while the off-diagonal elements represent the incorrect predictions. The overall error rate is calculated by summing up the incorrect predictions and dividing it by the total number of predictions.

In this case, the total number of predictions is the sum of all the elements in the confusion matrix, which is 80 + 100 + 20 + 120 = 320.

The total number of incorrect predictions is the sum of the off-diagonal elements, which is 100 + 20 = 120.

The percent overall error rate is then calculated by dividing the total number of incorrect predictions by the total number of predictions and multiplying by 100:

(120 / 320) * 100 = 37.5%.

Therefore, the percent overall error rate is approximately 37.5%, which corresponds to option b.

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The range of computer-generated random numbers is

[0, 1)

[–8, 8]

[–8, 0)

[1, 8]

The confusion matrix for a classification method with Class 0 and Class 1 is given below. What is the percent overall error rate?

confusion matrix

actual/predicted            0                1

          0                          80            100

           1                          20            120

\(a. \( 45.67 \% \)\\b. \( 37.50 \% \)\\ c. \( 55.82 \% \)\\ d. \( 38.70 \% \\)

Answer:

  4.34 inches

Step-by-step explanation:

You want the diameter of a cylinder if the stroke length is 4.5 in, and 6 of them have a volume of 400 in³.

Filling the given values into the formula, we have ...

  400 = π/4(d²)(4.5)(6)

  d² = 400(4)/(4.5·6π) . . . . . . . . . divide by the coefficient of d²

  d = 40/(3√(3π)) ≈ 4.34 . . . . . . . take the square root

The diameter is about 4.34 inches.

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Answer:

The answer is A B C and E

Step-by-step explanation:

I just took it

The statements are true A, B, C, and E.

The chances of an event occurring are defined by probability. Probability has several uses in games, in business to create probability-based forecasts,

The given data in the problem is;

No of the  students from Midland High = 5

No of the students from Leasburg High= 3

No the students from Cassville High = 6

The statements that are true will be;

A.Order matters in this scenario.

B.There are 2,184 ways to select a first-place,second-place, and third-place winner.

C.The probability that all three winners are from Midland High is 0.0275.

E.The probability that all three winners are from Cassville High is 0.0549

Hence the statements are true A, B, C, and E.

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