Can someone please answer this

The calculated value of standard deviation for the given data set is 2.236.

Standard deviation is the measure of dispersion of the observed values relative to the mean value. It indicates how far each value is apart from mean value.

we have data list 2 4 6 8

 the list is denoted by X and X² is the square of the data set

    X        X²

   2          4

    4         16

     6        36

     8         64

we add all the data, and the result is ∑X = 20

similarly, we add all the squared value, and the result is ∑X² = 120

Standard deviation is calculated by using the formula below

SD = √[∑X²/N - (∑X/N)²]

here, N denotes the amount of data set

hence, N= 4

SD = √[120/4 - (20/4)²] = 2.236

hence, standard deviation is 2.236

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To solve a system of equations using substitution, you can start by solving one of the equations for one of the variables, such as x or y. For example, in this case, we can solve the first equation for x by subtracting y from both sides, like this:

[tex]-x - y = 1[/tex]
[tex]-x = 1 - y[/tex]

Now that we have an expression for x in terms of y, we can substitute that expression into the second equation to solve for y. When we do that, we get:

[tex]y = -(1 - y) + 4[/tex]
[tex]y = -1 + y + 4[/tex]

Now we can rearrange the terms on the right-hand side to make it easier to solve for y:

[tex]y = y + 4 - 1[/tex]

And when we combine the y terms on the left-hand side, we get:

[tex]2y = 3[/tex]

Finally, we can solve for y by dividing both sides by 2, like this:

[tex]y = 3 / 2[/tex]

Once we know the value of y, we can substitute it back into any of the original equations to solve for the other variable, x. In this case, if we substitute the value of y into the first equation, we get:

[tex]-x - y = 1[/tex]
[tex]-x - (3 / 2) = 1[/tex]

We can solve for x by rearranging the terms on the left-hand side and then dividing both sides by -1, like this:

[tex]-x = -1 + (3 / 2)[/tex]
[tex]x = (1 - 3) / 2[/tex]
Therefore, the solution to the system of equations is x = -1 and y = 3/2.

It's important to check your solution by substituting the values of x and y into the original equations to make sure they work. For example, if we substitute x = -1 and y = 3/2 into the first equation, we get:

[tex](-1) - (3 / 2) = 1[/tex]

And if we substitute the same values into the second equation, we get:

[tex](3 / 2) = (-1) + 4[/tex]

Both of these equations are true, which means our solution is correct.

The complete and simplified answer to the question what is 7/9 of 45 is 35.

The number above the fraction line is called the numerator and the number below it is called the denominator. To work out the fraction of any number, we first need to convert that whole number into a fraction as well.

Any number can be converted to fraction if you use 1 as the denominator:

45 / 1

So now that we've converted 45 into a fraction, to work out the answer, we put the fraction 7/9 side by side with our new fraction, 45/1 so that we can multiply those two fractions.

All we need to do is convert the whole number to a fraction and then multiply the numerators and denominators.

7 × 45 / 9 × 1 = 315 / 9

In this case, our new fraction can actually be simplified down further. To do that, we need to find the greatest common factor of both numbers.

You can use our handy GCF calculator to work this out yourself if you want to. We already did that, and the GCF of 315 and 9 is 9.

We can now divide both the new numerator and the denominator by 9 to simplify this fraction down to its lowest terms.

315 / 9 = 35

9 / 9 = 1

When we put that together, we can see that our complete answer is:

35 / 1

The complete and simplified answer to the question what is 7/9 of 45 is:

35

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According to the given statement the width of the walkway (x) is 8 feet.

Four of the sides of a square's two-dimensional form are equal in length. In a square, all four internal angles were right angles, and the opposing sides are parallel to one another. Real-world examples of square-shaped things include floor tiles, tea towels, hexagonal tiles, cheddar cheese, and so on.

Area of a Square = (side)(side)

Total area of the pool and walkway = 506 sq. ft

Length of the pool and walkway = 7 + 2x

Width of the pool and walkway = 6 + 2x

Thus, we will have the equation of the total area as:

(7 + 2x)(6 + 2x) = 506

4x² + 12x + 14x + 42 = 506

4x² + 26x + 42 = 506

4x² + 26x + 42 - 506 = 0

4x² + 26x - 464 = 0

2x² + 13x - 232 = 0

[tex]x = - \frac{\sqrt{169 + 1856}}{4}- \frac{13}{4} ,\\\\\quad x = \frac{\sqrt{2025}}{4} - \frac{13}{4} \\\\\quad x = \frac{45}{4}- \frac{13}{4} \\\\[/tex]

x = 8

so, the width of the walkway (x) would be 8 feet.

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Answer:

3.375 or 3 3/8

Step-by-step explanation:

divide 2 1/4 to get 1 1/8 or 1.125 then multiply by 3 to get 3.375 or 3 3/8

Rigid body motion is a change that preserves space's geometric characteristics. It is a distance-preserving map or isometric since Euclidean qualities may be described in terms of distance.

The separation between each pair of the geometric object's points is preserved during a rigorous change of the object. In other words, a rigid transformation maintains the object's size and shape. For instance, the rigid transformation of a triangle retains the angles and lengths of the triangle. Imagine a stiff shape distortion, similar to a cardboard shape. The form remains the same after being pushed left and right, rotated, and flipped. When the mold was created using putty, the opposite was true. The thing can then be twisted and stretched. These conversions, nevertheless, are not exact. Stretching a form alters the distances between each pair of its points.

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To find the sale price of the item, we need to multiply the regular price by the discount percentage, then subtract the result from the regular price. In this case, the discount is 45% * $85 = $<<45*.01*85=38.25>>38.25. So the sale price of the item is $85 - $38.25 = $<<85-38.25=46.75>>46.75. Answer: \boxed{46.75}.

Answer:

$46.75

Step-by-step explanation:

Original price: $85

Markdown: 45%

Price: 0.55(85)=$46.75

Sale Price: $46.75

Kelly's estimate cannot be said to be reasonable because it falls below the range of acceptable number of sunglasses from the given amount in each box.

We are told that Kelly bought 4 boxes.

Now, we are told that each box had either 20, 25, or 30 pairs of sunglasses in it.

Thus;

Minimum number of sunglasses = 20 * 4 = 80 sunglasses

Maximum number of sunglasses = 30 * 4 = 120 sunglasses

Now, we are told that Kelly estimates a reasonable number of sunglasses to be 70.

From our previous calculations, the minimum possible can only be 80 and as such her estimate falls lower and we conclude that it is unreasonable.

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If the employee received maximum SSP in 28 weeks, then he or she is not qualified.

Here we have to identify the reason for the rejection of SSP for the employee.

In order to find the reason, we must know that is meant by SSP.

The term SSP refers a tool used to coordinate the supply and distribution of ad inventory to and from advertisers

Based on the definition, we have identified that if the employees does not qualify for SSP if they have received the maximum amount of SSP in last 28 weeks are getting Statutory Maternity Pay or Maternity Allowance then there are special rules for pregnant women and new mothers who do not get these payments.

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The Python range() method needs three arguments to work: start value, stop value, and step value. after increasing the values by the step value's stated amount.

For a specific data collection, the statistical range is the range of values between the highest and lowest values. The difference between the highest and lowest observation can also be used to illustrate the range. Subtracting the highest number from the lowest yields the sample interval. The sample range is a crucial indicator of variability for variables that are continuous.

here ,

The series of integers returned starts with this integer, startNumber (optional).

stopNumber: This number is the last in the series of integers returned by range().

the stepValue (optional): An integer value indicating how much each successive integer differs from the previous one.

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Answer:

x=4

Step-by-step explanation:

3x+2=5x-6

3x+2-2=5x-6-2

3x=5x-8

3x-5x=5x-8-5x

-2x=-8

divide by -8 by -2

x= 4

Answer:

EF = 7

Step-by-step explanation:

Take EG - FG = EF

19 - 12 = 7

So, the answer is EF = 7

Answer:

let x = total cost

x = 5(18.5 + 3.25)

x = 5(21.75)

x = $108.75

108.75 = 5(18.5) + 5(3.25)

108.75 = 92.5 + 16.25

108.75 = 108.75

Therefore, the total cost will be $108.75.

Step-by-step explanation:

The ordered pair found in inverse of g is  ( 1 , 4 ) .

Given :

Relation :

A function is a relation which describes that there should be only one output for each input (or) we can say that a special kind of relation (a set of ordered pairs), which follows a rule .

Values for relation g are given in the table:

X  Y = g( X )

5  -3

4    1

3   -2

2    0

then the table for g inverse will be:

X      Y = g^-1 ( x )

-3       5

1       4

-2     3

0     2

Hence, the ordered pair found in inverse of g is ( 1 , 4 )

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Full question :

Values for relation g are given in the table. Which ordered pair would be found in the inverse of g?.

X  Y = g( X )

5  -3

4    1

3   -2

2    0

Answer:

[tex]\frac{1}{a}[/tex]

Step-by-step explanation:

the product of a number and its multiplicative inverse = 1 , then

a × [tex]\frac{1}{a}[/tex] = 1

multiplicative inverse of a is then [tex]\frac{1}{a}[/tex]

The proposed Exponential decay model for wolf population, w is given by  w(t) =w(1-r)∧t, where w is the function of time, t

w(t) =870(1-0.19)∧t

The model that estimates the number of populations decreases at a particular rate with the passage of time.

In the above question, rate of decay denoted by r = 19%

population size, w= 870 during the year 2009.

the population size w is the function of time, t

now, exponential decay model will be w(t) = w (1-r)∧t

Now using the given data, w(t) = 870(1-0.19)∧t

hence, exponential decay model is w(t) = 870(1-0.19)∧t

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the probability is 0.00539 for the household whose income is excess of $50000.

the ratio of favorable outcome to total possible outcome.

the ratio of the size of random sample to the actual size.

Given, sample proportion p∧ ≥0.22

size of random sample, p= 750

now, size of household, n = p/p∧ =750/0.22= 3409

number of households shown in census= 18.4%

now the probability = number of favorable outcome/ total possible outcome.

probability of gaining income excess of $50000 is 18.4/3409 = 0.00539

hence, 0.00539 is the proportion whose income is excess .

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The median for the next batch of observations is 2.

The median is the value in the middle of a data set, which indicates that 50% of the data points have a value less than or equal to the median, and 50% have a value greater than or equal to the median. The median is the number in the middle of a set of numbers. The median represents the 50th percentile of the set of numbers. In other words, the median is the value in the center of a set of numbers where half are less than the median and half are more than the median.

Here,

given set of observation,

=1,1,2,4,6,8

n=6

median=6/2

=3rd term

=2

The median for following set of observation is 2.

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The number of different groups of 7 people who can drive will be 31,824.

A permutation is an act of arranging items or elements in the correct order. Combinations are a way of selecting items or pieces from a group of objects or sets when the order of the components is immaterial.

You volunteer to help drive people home from an event. There are 18 people who need rides, but you can only fit 7 of them in your vehicle.

Then the number of different groups of 7 people can you drive will be

Different ways = ¹⁸C₇

Different ways = 18! / [(18 - 7)! x 7!]

Different ways = 18 x 17 x 16 x 15 x 14 x 13 x 12 x 11! / (11! x 7 x 6 x 5 x 4 x 3 x 2 x 1)

Different ways = 31824

The number of different groups of 7 people who can drive will be 31,824.

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Then the number of different groups of 7 people can you drive will be

Different ways = ¹⁸C₇

Different ways = 18! / [(18 - 7)! x 7!]

Different ways = 18 x 17 x 16 x 15 x 14 x 13 x 12 x 11! / (11! x 7 x 6 x 5 x 4 x 3 x 2 x 1)

Different ways = 31824

The number of different groups of 7 people who can drive will be 31,824.

Answer:If a point is on the perpendicular bisector of a segment, then it is equidistant from the endpoints of the segment. In addition to the Perpendicular Bisector Theorem, we also know that its converse is true.

Step-by-step explanation:

Points on a perpendicular bisector of a line segment are equidistant from the segment’s endpoints.

a. True

Answer:6 quizzes over 1  week

Step-by-step explanation: because if u add 6 + 6+ 6 that 18 so ya

The values are

Define Rounding Numbers

Rounding means replacing a number with an approximate value that has a shorter, simpler, or more explicit representation. For example, replacing $23.4476 with $23.45, the fraction 312/937 with 1/3.

Round Values to Nearest Tenth :

To round the decimal number to its nearest tenth, look at the hundredth number. If that number is greater than 5, add 1 to the tenth value. If it is less than 5, leave the tenth place value as it is, and remove all the numbers present after the tenth's place.

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Answer:

true

Step-by-step explanation:

click'thanks'on the question page

and follow

A function is a relationship between a set of possible inputs and outputs, where each input is associated with exactly one output.

A non-function is a relation between a set of inputs and a set of possible outputs where there is at least one input with more than one output.

The vertical line test can be used to ascertain whether a relation is a function. If you can draw a vertical line through the graph of the relationship and it intersects the graph at more than one point, then the relation is a non-function. If the vertical line intersects the graph at only one point, then the relation is a function.

Another way to determine if a relation is a function is to look at the equation defining the relation. If the equation does not contain any x's in the denominator, then the relation is a function. If the equation contains x's in the denominator, then the relation is a non-function.

For example, consider the relation defined by the equation y = x^2. This relation is a function because there are no x's in the denominator.

On the other hand, consider the relation defined by the equation y = 1/x. This relation is a non-function because the equation contains an x in the denominator.

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The factors are (3x + 2)(x + 5).

Factorization or factoring is the process of breaking down an entity—such as a number, matrix, or polynomial—into a product of another entity—or factors—that, when multiplied together, give the original number, matrix, or other entity.

Given  3x² + 17x + 10

factors of equation is

In order to factorize this expression, we can split the Middle Term.

If we want to factorize an expression like a x² + b x + c using this method, we need to think of two numbers that are like:

n₁.n₂ = a.c = 3.10 = 30

and n₁ + n₂ = b = 17

3x² + 2x + 15x + 10

= x(3x + 2) + 5(3x + 2)

= (3x + 2)(x + 5)

Hence, the factors are (3x + 2)(x + 5).

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The correct question is

Factorize 3x² + 17x + 10

The graph of a linear function is a straight line. One independent variable and one dependent variable make up a linear function.

Equations (functions or graphs) that create a straight line when graphically depicted are known as linear functions.

Typically, linear functions take the following form: y=mx+b or f(x)=a+bx.

X and Y are the two variables of a linear function.

Independent variable: x (Hori. axis)

dependent variable for y (Vert. axis)

Replace the problem's value with the value of f (x).

Distinguish the variable. In this instance, you transfer the constant term over by adding 1 to both sides to isolate the variable term.

Keep isolating the variable.

X serves as the independent variable while

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Answer:

a = 60

Step-by-step explanation:

a/5 - 8 = 4

a/5 = 12

a = 60

Answer:

a = 60

Step-by-step explanation:

a/5 - 8 = 4

a/5 = 4 + 8

a/5 = 12

a = 5*12

a = 60

Check:

60/5 - 8 = 4

12 - 8 = 4

The differential equation that could describe this relationship is → d²V/dt² - (3KV²)dV/dt = 0.

Given is that the rate of change of the volume {V} with respect to time {t} of water leaking from a tank is proportional to the cube of the volume.

We can write the proportional relationship as -

{dV/dt} [tex]$\alpha[/tex] {V}³

Replacing the proportional relationship as -

dV/dt = KV³               {K is constant}

d²V/dt² = K x d/dt (V³)

d²V/dt² = K x 3V² (dV/dt)

d²V/dt² = 3KV²(dV/dt)

d²V/dt² - (3KV²)dV/dt = 0

Therefore, the differential equation that could describe this relationship is → d²V/dt² - (3KV²)dV/dt = 0.

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Answer:

8 years old and Laura is 32

Step-by-step explanation:t

Let the daughter be equal to "x".

Laura would be "4x".

In 16 years Laura will be twice as old can be expressed as this:

4x+16=2(x+16)

Solve:

4x+16=2x+32

2x=16

x=8

Therefore at present time, the daughter is 8 years old and Laura is 32.

The equations allow us to compare the slopes of two lines to determine if they are parallel. The lines are parallel if the slopes are the same and the y-intercepts are different. The lines are not parallel if the slopes differ.

Perpendicular lines do meet, but parallel lines do not. They meet at a straight angle, or 90 degrees.Different perpendicular lines have different slopes. There is a distinct difference in the slopes of perpendicular lines.

One line's slope is equal to the other line's slope's negative reciprocal. A number's reciprocal and its product equal one. If m 1 and m 2 are negative reciprocals of one another, then multiplying them together will result in the number 1.

As with parallel lines, we can determine whether two lines are perpendicular by comparing their slopes. The slope of each line below is the negative reciprocal of the other so the lines are perpendicular.

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The slope of one line is equal to the negative reciprocal of the slope of the other line. The product and reciprocal of a number are both one. The outcome of multiplying m 1 and m 2 together if they are the negative reciprocals of one another is 1.

Similar to parallel lines, we can compare the slopes of two lines to determine if they are perpendicular. Each of the lines below has a slope that is the negative reciprocal of the other, making them perpendicular.