What is the formula of standard deviation method?

Answers

Answer 1

The formula of standard deviation method is

[tex]P=\sqrt{\frac{ \sum(X-\mu)^2}{N}}[/tex]

[tex]S=\sqrt{\frac{ \sum(X-\bar{x})^2}{n-1}}[/tex]

What is the standard deviation?

A standard deviation is a measurement of the data's dispersion from the mean. Data are grouped around the mean when the standard deviation is low, and are more dispersed when the standard deviation is high.

Standard deviation It is a measure of how spread out numbers are. It is the square root of the Variance, and the Variance is the average of the squared differences from the Mean.

population mean:

[tex]P=\sqrt{\frac{ \sum(X-\mu)^2}{N}}[/tex]

X- the value in the data distribution

[tex]\mu[/tex]  - the population mean

N- total number of observations

[tex]S=\sqrt{\frac{ \sum(X-\bar{x})^2}{n-1}}[/tex]

[tex]\bar{x}[/tex]  - the sample mean

n- total number of observations

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Related Questions

a tree is a graph with no cycle. show by induction that a tree with n nodes contains n −1 edges.

Answers

The statement holds for all positive integers n, and a tree with n nodes contains n-1 edges.

The statement can be proven by induction.

Base case: If a tree has one node, then it has no edges (n = 1, n-1 = 0).

Inductive step: Assume the statement is true for n = k (i.e. a tree with k nodes contains k-1 edges). We prove it is true for n = k+1.

Let T be a tree with k + 1 nodes, and let v be any node in T. Then, since T is a tree, v must have exactly one parent node and k-1 child nodes (or no child nodes at all). Let T' be the subtree of T rooted at v, which has k nodes. By the inductive hypothesis, T' has k-1 edges.

Since v has exactly one parent node, there is exactly one edge connecting it to its parent in T. Thus, T has k-1 + 1 = k edges, which means the statement holds for n = k + 1.

Therefore, by induction, the statement holds for all positive integers n, and a tree with n nodes contains n-1 edges.

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find the equation of the tangent line to the graph of the function f(x)=(x2 9)(x−4) at the point (1,−30) .

Answers

The point-slope formula can be used to get the equation of the tangent line to the graph of the function f(x)=(x2 - 9)(x - 4) at the point (1, -30).

To get the slope at the position (1, -30), first take the derivative of the function:

f'(x) = (x2 - 9) (x2 - 9)

(x - 4)' = 2x - 9/x - 4

Check the derivative at x = 1 now:

f'(1) = 2(1) - 9/(1) - 4 = -93

The line has a -93 slope.

Now, enter the point-slope formula the point (1, -30) and the slope (-93):

y - (-30) = -93(x - 1) (x - 1)

If we simplify, we get:

y = -93x + 22

As a result, y = -93x + 22 is the equation of the tangent line to the graph of the function f(x)=(x2 - 9)(x - 4) at the point (1, -30).

The point-slope formula can be used to get the equation of the tangent line to the graph of the function f(x)=(x2 - 9)(x - 4) at the point (1, -30). According to the point-slope formula, the equation of the line is y - y1 = m for a given point (x1, y1) and slope (m) (x - x1). The specified point in this instance is (1, -30), and the slope of the line may be calculated by calculating the function's derivative and evaluating it at x = 1. The derivative of the function f(x) is 2x - 9/x - 4, which for x = 1 translates to -93. When the point and slope are entered into the point-slope equation, we obtain the result y - (-30) = -93(x - 1), which is abbreviated to y = -93x + 22. As a result, y = -93x + 22 is the equation of the tangent line to the graph of the function f(x)=(x2 - 9)(x - 4) at the point (1, -30).

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Each of the two congruent sides of an isosceles trapezoid measures 9 cm. The little base measures 11 cm less than the large base. The perimeter of this trapezoid is 43 cm. What is the measurement of the large base?

Answers

The length of the large base of the trapezoid is 18cm.

What is the measurement of the large base of the trapezoid?

An isosceles trapezoid is simply a convex quadrilateral having a line of symmetry equally dividing one pair of opposite sides.

Given the data in the question

Let the large base be represented by 'x'

Large base = xLittle base = x - 11Each of the two congruent sides = 9cmPerimeter = 43

The perimeter of the trapezoid is the sum of all the sides of all its sides.

Perimeter = side a + side b + side c + side d

Hence;

43 = x + ( x - 11 ) + 9 + 9

Solve for x

43 + x + x - 11 + 18

43 = 2x + 7

43 - 7 = 2x

36 = 2x

2x = 36

x = 36/2

x = 18

Hence;

Large base = x = 18cm.

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Amir is growing three plants.
He keeps track of each plant's height over time.
Which plant is growing the slowest?

Answers

Slowest growing plant is plant A.

What is slope?

The Slope (also called Gradient) of a line shows how steep it is.

To calculate the Slope:

Divide the change in vertical distance by the change in horizontal distance

Given,

Amir grows three plants,

Graph of plant A is given with straight line,

Height is denoted on x axis,

Time is denoted on y axis

Slope of the line will represent growth rate.

Line passes through (1,2) and (2,4)

slope of the line

= y-y'/x-x'

= 2 - 4/1 - 2

= - 2 / - 1

= 2

Growth rate = 2 inches per month

For plant 2

by the table,

Height  is 15 inches in 6 months.

Growth rate = 15/6 = 2.5 inches per month

Equation for plant 3

h = 3.5t

Slope of the equation = 3.5

Growth rate = 3.5 inches per month

By the above calculation,

Growth rate of plant A is least.

Hence, Plant A is growing slowest.

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Using the origin as the center of dilation and a scale factor of k=1/2, find the coordinates of the vertices of the image of the polygon below.

(Show Work PLEASE)

Answers

Answer:

A' (-2, -1.5)

B' (-2, 1.5)

C' (1, 1.5)

D' (1, -1.5)

Step-by-step explanation:

If you start at (0,0) and go to Point A, you go 4 to the left and down 2.  Half of that is left 3 and down 1.5.  That is where A' will go.  Do the same thing to the other 3 points.

HELP ME

how do i do this. im terrifingly confused

Answers

Tricky question

The formula to find the volume of a cone is: V = 1/3 (pi x radius sqr x height)

And for the cylinder
V= pi x radius sqr x height

So it is multiplied by 3

Volume of cone = 9
Volume of cylinder = 27

(The volume formula for the cone is dividing by 3)

In the diagram below, D E ‾ DE is parallel to A B ‾ AB . If D E DE is 5 5 less than D C DC, A C = 56 AC=56, and A B = 48 AB=48, find the length of D C ‾ DC . Figures are not necessarily drawn to scale. State your answer in simplest radical form, if necessary.

Answers

The length of line segment Dc is equal to 35 units.

How to determine the length of DC?

In Mathematics, two geometric figures are considered to be congruent only when their corresponding side lengths are congruent and the magnitude of their angles are congruent.

Since side length DE is parallel to AB and side DE is 5 less than side length DC, we have the following:

DE = DC - 5

In Geometry, the corresponding side lengths of two similar geometric figures are proportionate and as such, we have the following:

DC/AC = DE/AB

DC/56 = DC - 5/48

48DC = 56(DC - 5)

48DC = 56DC - 280

56DC - 48DC = 280

8DC = 280

DC = 280/8

DC = 35 units.

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find an equation of the sphere with center (-5, -3, 0) and radius 1

Answers

Equation of the sphere with center (-5, -3, 0) and radius 1 is (x + 5)² + (y + 3)² + z² = 1.

The Sphere is what?

All points on a sphere are at a set distance from the centre, making it a three-dimensional geometric object. It is thought to be one of the most basic three-dimensional shapes and is a perfect circle.

Both a circle and a sphere are round, if you compare them. The fact that we can measure the volume and area of a sphere is due to the fact that a sphere is three-dimensional as opposed to a circle, which is a two-dimensional shape.

It is possible to formulate the equation for a sphere with centre (h, k, l) and radius r as follows:

(x - h)² + (y - k)² + (z - l)² = r²

Using the given center (-5, -3, 0) and radius 1, we can write the equation of the sphere as:

(x + 5)² + (y + 3)² + (z)² = 1²

which simplifies to:

(x + 5)² + (y + 3)² + z² = 1.

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If the mean of 6 numbers is 36, what is the 6th number if 5 of the numbers are 27, 42, 43, 45, and 35?

Answers

The sixth number in the data is 24.

What is mean of a data?

Mean is an arithmetic average of the data set, and it can be calculated by dividing a sum of all the data points with the number of data points in the data.

Given that, the mean of 6 numbers is 36, we need to find the 6th number if 5 of the numbers are 27, 42, 43, 45, and 35

We know that,

Mean = (sum of observations) ÷ (total number of observations)

Let the sixth number be x,

Therefore,

36 = (27 + 42 + 43 + 45 + 35 + x) / 6

216 = 192 + x

x = 24

Hence, the sixth number in the data is 24.

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How to find the zeros of a function?

Answers

The zeros of a function can be obtained by factor method, by solving equation or on a graph.

What are zeros of a function?

The values of x for which a function f(x) becomes zero, or f(x)=0, are known as the zeros of the function.

There are 3 different ways by which we can find zeros of a function.

The 3 ways are:

1. By factor method

In order to use this strategy, we must first identify a function's factors. The roots of a function are then obtained by equating the factors with zero.

2. By solving an equation

In some functions, it can be challenging to identify the factors directly. In these situations, we first create an equation by equating the polynomial function with zero. The equation is then resolved. A function's roots are the roots of an equation.

3. On a graph

This is the simplest method for locating a function's zeros. With this approach, we must identify the point at which a function's graph touches or cuts the x-axis (i.e., the x-intercept). The zeros of a function are the locations where the graph cuts or touches the x-axis.

Hence, by these ways we can find the zeros of a function.

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Exponential Functions

Answers

The amount of money left after 8 quarters is $3,547,878

How much of your original money will you have after 8 quarters?

The theory used in this question is exponential decay, which describes how the value of a quantity decreases over time.

In this case, the value of the original investment decreases by 7% each quarter.

The steps for this process are as follows

Convert the percentage to a decimal. 7% = 0.07

Substitute the values into the equation: y = 5,000,000(1 - 0.07)t

Simplify the equation by multiplying the numbers in the parentheses: y = 5,000,000(0.93)t

Substitute the number of quarters into the equation: y = 5,000,000(0.93)8

Calculate the amount of money left after 8 quarters: y = 5,000,000(0.93)8 = 3,547,878

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what is this one ??
i have 4 more

Answers

Answer:

see below

Step-by-step explanation:

year 1

7000*(1+13%) = 7910

year 2

7910*(1+13%) =8940

Porter is visiting india and would like to purchase some local spices. He finds some spices that cost 452. 95 rupees. If the current exchange rate is 1 dollar:73. 6500 rupees, how much do the spices cost in u. S. Dollars?.

Answers

The spices cost 6.15 in dollars. Porter is visiting India and bought species cost 6.15 dollars.

Here, these values are given, which is important for our solution,

So, after putting the values,

Porter bought species cost 452.95 rupees after visiting to India.

Current exchange rate = 1 dollar = 73.6500 rupees.

Here , 73.6500 rupees = 1 dollar

So, 1 rupee = 1/ 73. 6500 dollar

Then , 452. 95 rupees = 452. 95/ 73.6500 dollar.

After diving the rupees value by dollar values,

We get these values,

So, here,  452.95 rupees became 6.15 dollars.

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Answer: $6.15

Step-by-step explanation:

Porter bought species cost 452.95 rupees after visiting to India.

Current exchange rate = 1 dollar = 73.6500 rupees.

Here, 73.6500 rupees = 1 dollar

So, 1 rupee = 1/ 73. 6500 dollar

Then, 452. 95 rupees = 452. 95/ 73.6500 dollar.

After diving the rupees value by dollar values,

We get these values,

So, here, 452.95 rupees became 6.15 dollars.

Miles receives $6,000 from his parents. He wants to buy an used car that costs $12,500. If
he invests the money from his parents into an account that pays 7.5% interest compounded
continuously, how long will it take before he has a enough money to buy the car? Round your
answer to the nearest year.

Answers

Answer:

10 years

Step-by-step explanation:

principal = 6000

int = 7.5% annual compounding CONTINUOUSLY = everyday

so every day of the year he gets 7.5% / 365

so annual effective rate =7.7876%

so to get to 12500 it'll take t years

12500 = 6000* (1+ 7.7876% )^t

2.0833=1.077876^t

solve for t

approximately 10 years

10 years is the correct answer to the question

Crissy took out an installment loan to pay for her new car. She borrowed $22500 for 40
months with a $6743.25 finance charge. Find her APR to the nearest hundredth of a
percent. Don't forget to include the percentage symbol (%).
O 16.91%
O 16.19%
O 19.16%
O 19.61%

Answers

The APR, given the finance charge, the amount borrowed, and the number of months, is b. 16. 19 %

How to find the APR?

You can find the APR by using the RATE function on Spreadsheet.

The number of periods = 40 months

The Payment per month was:

= ( Loan amount + Finance charge )

= ( 22, 500 + 6, 743 .25 ) / 40 months

= $ 731.08125

The present value is the loan amount of $ 22, 500

The monthly rate is 1. 13456 %

The APR is:

= 1. 3456 x 12 %

= 16. 19 %

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Samtech manufacturing purchased land and building for $4 million. In addition to the purchase price, samtech made the following expenditures in connection with the purchase of the land and building:.

Answers

The initial valuation of each asset Samtech acquired in transactions:

Value capitalized  = $4,000,000 + $16,000 + $5,000 + $4,000

Value capitalized   = $4,025,000

Assets              Fair value       Total percentage      Proportional value

1.Land           $3,300,000             75%                        $2,475,000

2.Building       $1,100,000             25%                        $275,000

Total              $4,400,000           100 %                      $2,750,000

Working Notes :

Land =($3,300,000 ÷ $4,400,000) =75%

Building =($1,100,000 ÷ $4,400,000) = 25%

Land Improvement =$82,000 + $40,000 =$122,000

2) The initial valuation of each asset assumes that immediately after acquisition that Samtech demolished the building:

  Entries                                                               Amounts

1. Purchase cost                                                  $4,000,000

2. Add: Title insurance of                                     $16,000

3. Add: Legal fees for drawing the contract         $5,000

4. Add: State transfer fee of                                  $4,000

5. Add: Demolition cost                                        $250,000

6. Add: Cleaning and grading cost                     $86,000

7. Less: Salvage material                                     $6,000

    Total Cost of land                                          $4,355,000

Land Improvement = $82,000 + $40,000 = $122,000

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The complete question is:

Samtech Manufacturing purchased land and building for $4 million. In addition to the purchase price, Samtech made the following expenditures in connection with the purchase of the land and building: Title insurance $ 16,000 Legal fees for drawing the contract 5,000 Pro-rated property taxes for the period after acquisition 36,000 State transfer fees 4,000 An independent appraisal estimated the fair values of the land and building if purchased separately, at $3.3 and $1.1 million, respectively. Shortly after the acquisition, Samtech spent $82,000 to construct a parking lot and $40,000 for landscaping. Required: 1. Determine the initial valuation of each asset Samtech acquired in these transactions. 2. Determine the initial valuation of each asset, assuming that immediately after acquisition, Samtech demolished the building. Demolition costs were $250,000 and the salvaged materials were sold for $6,000. In addition, Samtech spent $86,000 clearing and grading the land in preparation for the construction of a new building.

now imagine that you know the volume of the solid (v, measured in cm 3 ) and the length of two of the three sides, b and c (measured in cm). explain in words or with an equation how you can calculate the length of the remaining side, a.

Answers

If  you know the volume of the solid and the length of two of the three sides, b and c the length of the remaining side, a can be calculated by putting this values in the formula of volume(height*breadth*length).

The area that any three-dimensional solid occupies is known as its volume. These solids can take the form of a cube, cuboid, cone, cylinder, or sphere.

Various forms have various volumes. We have studied the several solids and forms that are specified in three dimensions, such as cubes, cuboids, cylinders, cones, etc., in 3D geometry. We will discover how to find the volume for each of these shapes.

Volume = a× b× c

a = V / b×c

Cubic units are used to quantify a solid's volume. For instance, the volume will be given in cubic metres if the dimensions are given in metres. The International System of Units uses this as the reference unit for volume (SI). Cubic metres, cubic feet, cubic inches, etc. are additional volume units.

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graph a line with a slope of -3 that contains the point (4,-2)
(for 20 points)

Answers

I redrawn the line in the picture. Hopefully this helps you

how did we get value 0.0004?

Answers

Unfortunately, without more context about the origin of the value 0.0004, it is not possible to provide a detailed explanation of how it was obtained. The method for obtaining this value will depend on the context in which it is used.

For example, if 0.0004 is a decimal fraction, it may have been obtained by dividing a small number by a larger number. If it is a monetary amount, it may have been the result of a calculation involving currencies, exchange rates, or taxes. If it is a measurement of physical quantity, it may have been obtained using a scale, ruler, or other measuring device.

The value 0.0004 can have different meanings depending on the context in which it is used. For example, it could represent a decimal fraction, a monetary amount, or a measurement of physical quantity.

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Answer:

Step-by-step explanation:

What are the four important properties of a parallelogram?

Answers

Answer:

see below

Step-by-step explanation:

Opposite sides are congruent (AB = DC).

Opposite angels are congruent (D = B).

Consecutive angles are supplementary (A + D = 180°).

If one angle is right, then all angles are right.

The four properties of parallelogram are:

i) Opposite sides are parallel & equal.

ii) Sum of adjacent interior angles is 180°

iii) Opposite angles are equal.

iv) Diagonals bisect each other.

What is an parallelogram?

The quadrilateral with two pairs of parallel sides is known as a parallelogram. Equal in length and width on both sides is required. Four vertices make up a parallelogram, which also has four edges.

A parallelogram is a two-dimensional (2D) shape that has two matching pairs of opposite sides that are parallel and equal in length. The angles inside the two sides of the shape must add up to 180 degrees, which means that all of the angles must add up to 360 degrees.

A rectangle that has been pushed over slightly is all that a parallelogram really is. Because of this, finding the area of a parallelogram can be done using the same formula as finding the area of a rectangle.

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Find the smallest pair of 4-digit numbers such that the difference between them is 303 and their hcf is 101. Show your step.

Answers

Based on the information provided, the two whose is 101 are 1010 and 1313.

?

The is the highest common factor or in other words, the highest by which two numbers can be divided. Let's start by listing the four digits that can be the related to 101.

101 x 10 = 1010

101 x 11 = 1111

101 x 12 = 1212

101 x 13 = 1313

Now, from these numbers, there are two numbers whose difference is

1313 - 1010 = 303

Based on this, the two numbers are and

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Find two numbers whose difference is 303, hcf is 101 and are 4 digits long.

Start by writing down two 4-digit numbers that have a difference of 303. The two numbers should be close together, but not the same number. For example, you could choose 9801 and 9498.

Next, find the factors of each number. For 9801, the factors are 3 x 3 x 11 x 101 and for 9498 the factors are 2 x 7 x 13 x 101.

Now, find the Highest Common Factor (HCF) of the two numbers. To do this, you can look at the factors of both numbers and find which ones are the same. In this case, the HCF is 101.

Finally, check if the difference between the two numbers is still 303. As 9801-9498 = 303, this is correct. Therefore, 9801 and 9498 are the smallest pair of 4-digit numbers with a difference of 303 and an HCF of 101.

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find p(-2) and p(3) for each function

p(x)=-7x^2+5x+9

p(x)=3x^3 - x^2 + 2x - 5

Answers

According to the Function, p(-2) = -29 and p(3) = 73 are the values that we have.

How do you know if something has a purpose or not?

The vertical line test has been used to determine if a graph accurately depicts a function. If a trendline created across the chart is moved and only ever hits it once, the chart is functional. If the line graph crosses the chart at least once, it is not a function.

The core concept of mathematics' calculus is functions. The functions are special types of relations. A function is a rule that generates a unique outcome for each input x in mathematics. A mapping or transformation in mathematics represents a function. Usually, letters like f, g, and h are used to designate these functions. The domain is the set of all possible values that can be passed into a function while it is specified. The term "range" refers to the whole set of values that the function's output is capable of producing. The co-domain is the set of possible values for a function's outputs.

put the value of x = -2 and x = 3 into the polynomials .

[tex]p(-2) = -7(-2)^{2} + 5(-2) + 9 = -7 \times 4 + (-10) + 9 = -28 + (-10) + 9 = -29\\p(3) = 3(3)^{3} - (3)^{2} + 2(3) - 5 = 3 \times 27 - 9 + 6 - 5 = 81 - 9 + 6 - 5 = 73\\So, for p(x) = -7x^{2} + 5x + 9, p(-2) = -29 $and$ p(3) = 73.\\For p(x) = 3x^3 - x^{2} + 2x - 5, p(-2) = -29 $and$ p(3) = 73.\\For p(x) = 3x^{3} - x^{2} + 2x - 5, p(-2) = -29 $and$ p(3) = 73.\\[/tex]

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The question y=4x; (1 4) yes or no question makes me really confused and I don't know if it's a yes or no

Answers

[tex](\stackrel{x}{1}~~,~~\stackrel{y}{4})\hspace{5em}y=4x \\\\[-0.35em] ~\dotfill\\\\ \underset{y}{4}~~ = ~~4(\underset{x}{1})\implies 4~~ = ~~4\textit{\LARGE \checkmark}[/tex]

Answer:

y = 4x; (1, 4) = TRUE

Step-by-step explanation:

(1, 4) basically means:

x = 1

y = 4

So we put these values into our equation:

4 = 4 x 1

4 = 4

What is the derivative of Secx by first principle?

Answers

First-principle differentiation of sec x results in ten times sec x.

Explain about the derivative of Secx?

Regarding the variable x, y = f(x). Wherever the limit occurs is defined to be the derivative of f at x if this limit exists and is finite. The first principle of derivative is another name for this definition.

Sec x tan x is, as far as we are aware, the derivative of sec x. Determining that sec x equals the integral of sec x tan x. Specifically, sec x tan x dx = sec x + C

On a graph, the first derivative shows the slope of the function at a particular position, while the second derivative shows how the slope changes as the independent variable is changed. The second derivative accounts for the curve in the above graph for a function with a variable slope.

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How to Evaluate the Expression in Algebra Calculator

Answers

you have to substitute a number for each variable and perform the arithmetic operations. In the example above, the variable x is equal to 6 since 6 + 6 = 12. If we know the value of our variables, we can replace the variables with their values and then evaluate the expression.

What is meant by arithmetic ?

The Father of Arithmetic is an Indian mathematician and astronomer by the name of Brahmagupta.The area of mathematics known as arithmetic deals with the study of numbers and the numerous operations that can be performed on them. Addition, subtraction, multiplication, and division are the fundamental mathematical operations.The difference between consecutive words is always two, hence the sequence 3, 5, 7, 9... is arithmetic. The difference between consecutive words is always minus five, hence the sequence 21, 16, 11, 6,... is also arithmetic.Since arithmetic is the most fundamental area of mathematics, it is crucial to learn and comprehend it thoroughly. Every other area of mathematics is impacted by arithmetic, which functions somewhat like the fundamental blocks for more challenging and sophisticated topics.

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Rafael is saving money to buy a game. So far he has saved $16, which is one-fourth of the total cost of the game. How much does the game cost?

Answers

Answer:If Rafael has saved $16, which is one-fourth of the total cost of the game, then the total cost of the game is 4 times the amount he has saved. So, the game costs:

$16 * 4 = $64

Therefore, the game costs $64.

Step-by-step explanation:

If Rafael has saved $16, which is one-fourth of the total cost of the game, then the total cost of the game is 4 times the amount he has saved. So, the game costs:

$16 * 4 = $64

Therefore, the game costs $64.

Determine if the following statements are true or false. The magnitude of a vector can be different in different coordinate systems. It is possible to add a scalar to a vector. A 2D vector can have a magnitude equal to zero even when one of its components it nonzero. The direction of a vector can be different in different coordinate systems. A 2D vector can have a component equal to zero even when its magnitude is nonzero. The components of a vector can be different in different coordinate systems. It is possible to multiply a vector by a scalar. Determine if the following statements are true or false. Remember that for a mathematical statement to be true it must be true in all cases. If V_3 = V_1 + V_2, then V_4 = 3V_1 + 3V_2 is parallel to V_3. If V_3 = V_1 + V_2, then V_3 - V_2 is parallel to V_1. If V_3 = V_1 + V_2, then V_3 = V_1 + V_2. If V_3 = V_1 + V_2, then V_3 > V_1.

Answers

The statements given are mostly true, except for the statements that V_4 is parallel to V_3 and that V_3 is greater than V_1.

The magnitude of a vector can be different in different coordinate systems. True

It is possible to add a scalar to a vector. True

A 2D vector can have a magnitude equal to zero even when one of its components it nonzero. True

The direction of a vector can be different in different coordinate systems. True

A 2D vector can have a component equal to zero even when its magnitude is nonzero. True

The components of a vector can be different in different coordinate systems. True

It is possible to multiply a vector by a scalar. True

If V_3 = V_1 + V_2, then V_4 = 3V_1 + 3V_2 is parallel to V_3. False

If V_3 = V_1 + V_2, then V_3 - V_2 is parallel to V_1. True

If V_3 = V_1 + V_2, then V_3 = V_1 + V_2. True

If V_3 = V_1 + V_2, then V_3 > V_1. False

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Solve the system of equations.

2

+
9

=
11

5

+
2

=

34


−2x+9y=11
−5x+2y=−34

Answers

To start we can multiply both equations by a number to get a common coefficient for x:

5(-2x+9y=11)
2(-5x+2y=-34)

That would give us:

-10x+45y=55
-10x+4y=-68

You would solve using the elimination method by subtracting the two equations and get

41y= 123

y= 3

Then you would substitute y into one of the equations

-2x+9(3)=11

-2x+27=11

-2x= -16

x= 8

So the answer is x= 8, y=3

simplify:6(y^2)^2(x^-2y)^-1 /3x^-3 y^5​

Answers

Using the properties of exponents, we simplify as follows:

6(y^2)^2(x^-2y)^-1 /3x^-3 y^5
= 6y^4 / 3x^-3 y^5
= 6y^4 / (3x^3 y^5)
= 6/3 * y^4 / x^3 y^5
= 2y^-1 * x^-3
= 2x^-3 / y

6 - 9b = - 10b - 4 =​

Answers

Answer:

B = 10/19 it's a fraction btw

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