summary statistics for the hourly wages of a sample of 130 system analysts are as follows:mean = 60range = 20mode = 73variance = 324median = 74the coefficient of variation equals . . .

Answer: 0

Step-by-step explanation: if the 5 doesn't change at all, it doesn't change at all. Common sense.

Answer:

the answer is 1 I just know cause ima genius and smart also I'm like 6'7 how could i.be wrong

Step-by-step explanation:

look

Taking the given ride lengths for 3 consecutive days and adding them the total number of miles ridden by the rider is 14.67 miles.

On Tuesday, the distance traveled is 1 and 1/2 times further than Monday's distance. This means that the distance traveled on Tuesday is 1.5 times the distance traveled on Monday.

To find the total distance traveled over a period of multiple days, we can add up the distances traveled on each day. This can be done by summing up all the individual distances traveled on each day. This can be done either in fraction or decimal. If the distances are in mixed numbers, it is good to convert them into fractions before adding them. This will give the total distance traveled over the period of multiple days.

On Tuesday, you ride 1 and 1/2 times further than on Monday, which is 3 and 2/3 miles * 1 and 1/2 = 5 and 1/2 miles.

On Wednesday, you ride 1 and 1/4 miles less than on Tuesday, which is 5 and 1/2 miles - 1 and 1/4 miles = 4 and 1/4 miles.

The total number of miles you rode on Monday, Tuesday, and Wednesday is:

3 and 2/3 miles + 5 and 1/2 miles + 4 and 1/4 miles = 13 and 5/6 miles

You can convert the mixed numbers to fraction to find the total miles.

3 and 2/3 miles = (33 + 2)/3 = 11/3 miles

5 and 1/2 miles = (52 + 1)/2 = 11/2 miles

4 and 1/4 miles = (4*4 + 1)/4 = 17/4 miles

So, the total number of miles you rode on Monday, Tuesday, and Wednesday is :

11/3 + 11/2 + 17/4 = (114 + 113 + 172)/12 = 11/3 + 33/4 = (114 + 11*3 + 34)/12 = 44/3 = 14.67 miles

You rode 14.67 miles in total for 3 days.

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Therefore , the solution of congruency problem is its two congruent halves are LJ and LI. The sections' sizes and forms must be consistent to be considered congruent.

Using the Side-Angle-Side Congruity Theorem (SAS), two triangles are believed to be compatible with one another if their corresponding two sides and included angle are the same. A defined angle is found to be present on 2 sections that are being taken into account. Therefore, it is insufficient to use the SAS Congruity Theorem to establish the congruence of two triangles based just on the presence of two pairs of reciprocals and one set of points of intersection.

Here,

Given: The illustration shows a congruent link between

the two portions LI and LJ.

The segments will be identical in terms of size and shape if they are congruent.

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For this kind of issue, you can select any option and the procedure will remain the same. Let's choose coffee as the beverage to analyse for the purposes of this response.

When a correlation coefficient's magnitude is between 0.5 and 0.7, it means that the variables are moderately correlated. Low correlation between the variables is indicated by correlation coefficients with magnitudes between 0.3 and 0.5.

In this equation, x stands for price, and y for sales.

-22.7x+130.3

The slope indicates the number of units that the sales would change by if we raised the price by one unit. Since our slope is -22.7, this indicates that a 1 unit price increase would result in a 22.7 decrease in sales.

The scatterplot's points are all intersected by the line of best fit, as can be seen. We can also calculate the Pearson correlation coefficient, which gives us -0.998, to add to the evidence. This suggests a very adverse relationship.

For this item we will just need the equation for the line of best fit and the data that has been given in the problem. For the actual sales, we will just refer to the given while we will compute for the predicted sales using the line of best fit.

PRICE            ACTUAL SALES              PREDICTED SALES

1.5                              96                                       96

1.6                              94                                       94

1.8                              91                                       89

2.0                              85                                       85

2.1                              83                                       83

2.2                              79                                       80

2.5                              73                                       74

2.7                              70                                       69

2.9                              64                                       64

3.0                              63                                       62

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According to angle symmetry, the value of x=125°

The two parallel lines intersected by a transversal form alternate angles. Consider the following figure, where EF and GH are two parallel lines. The transversal line RS intersects EF at L and GH at M. If a transversal cuts two parallel lines, the alternate angles are equal.

Since, AK and BL are parallel lines.

Hence,

∠ADC=∠BED=72°

∠EIH=∠DHG=55°

∠DHG+∠GHK=180°

∠GHK=180°-55°

∠GHK=125°=x

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Finding the distance between a point and a line vector in 3D is a bit more complicated than in 2D, but it is still doable.

Vector is a mathematical object that has both magnitude and direction and can be represented by a line segment. It is used in many areas of mathematics and physics. In physics, vectors are used to describe forces, velocities, and accelerations. In mathematics, vectors can be used to represent points in space, transformations, and even linear equations. Vector calculus is used to analyze the behavior of vector fields, or functions of multiple variables.

The formula for finding the distance is based on the vector equation of a line.

Starting with a line given by vector $\vec{r}= \vec{a}+t\vec{v}$ , where $\vec{a}$ is the point on the line, $\vec{v}$ is a unit vector, and $t$ is a scalar parameter, and a point $\vec{b}$, the distance between the point and the line can be found by first computing the vector $\vec{p}=\vec{a}-\vec{b}$. Then, the distance is given by $d=\frac{|\vec{p}\cdot \vec{v}|}{|\vec{v}|}$.

This formula can also be used to find the closest point on the line to the point $\vec{b}$. The closest point on the line is given by $\vec{a}+t\vec{v}$, where $t=\frac{\vec{p}\cdot \vec{v}}{|\vec{v}|^2}$.

Thus, finding the distance between a point and a line in 3D involves computing the vector $\vec{p}$ and then using the formula above to compute the distance.

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To find the distance between a point and a line vector in 3D using the formula  [tex]\frac{|(x_0-x_1)(x_0-x_2)|}{|x_2-x_1|}[/tex].

A vector is body which has both magnitude and direction. Geometrically, a vector can be imagined as a directed segment whose length corresponds to the absolute value of the vector and whose direction is indicated by an arrow. The direction of the vector is tail to head.

Suppose a 3D line is given by two points and the reference diagram attached below. where x₁ = (x₁,y₁ ,z₁) and x₂ = (x₂,y₂,z₂) are above it, giving us a vector along the line. [tex]v=[x_1+(x_2-x_1)t; y_1+(y_2-y_1)t; z_1+(z_2-z_1)t].[/tex]

The squared distance between a point on the line with parameter t and a point x₀ = (x₀, y₀, z₀) is therefore;

d² = [(x₁ - x₀) + (x₂ - x₁)t²] + [(y₁ - y₀) + (y₂ - y₁)t²] + [(z₁ - z₀) + (z₂ - z₁)t²]

To minimize the distance, set d(d²)/dt = 0 and solve for t to obtain:

t = [tex]\frac{-((x_1-x_0)(x_2-x_1))}{|x_2-x_1|^2}[/tex]

d² = (x₁ - x₀)² + (y₁ - y₀)² + (z₁ - z₀)² + 2t [(x₂ - x₁) (x₁ - x₀) + (y₂ - y₁) (y₁ - y₀) + (z₂ - z₁) (z₁ - z₀)] + t² [(x₂ - x₁)² + (y₂ - y₁)² + (z₂ - z₁)²]

= [tex]|x_1-x_0|^2-2[/tex][tex]\frac{[(x_1-x_0)(x_2-x_1)]^2}{|x_2-x_1|^2} + \frac{[(x_1-x_0)(x_2-x_1)]^2}{|x_2-x_1|^2}[/tex]

= [tex]\frac{|x_1-x_0|^2|x_2-x_1|^2 - [(x_1-x_0)·(x_2-x_1)]^2 }{|x_2-x_1|^2}[/tex]

Using vector quadruple product:

(A × B)² = A²B² - (A.B)²

Where x denotes the cross product then gives:

d² = [tex]\frac{|(x_2-x_1)x(x_1-x_0)|^2)}{|x_2-x_1|^2}[/tex]

Now taking the square root results in the formula:

d = [tex]\frac{|(x_2-x_1)(x_1-x_0)|}{|x_2-x_1|}[/tex]

= [tex]\frac{|(x_0-x_1)(x_0-x_2)|}{|x_2-x_1|}[/tex]

Here, the numerator is simply twice the area of the triangle formed by points x₀, x₁, and x₂, and the denominator is the length of one of the bases of the triangle, which follows since, from the basic triangle area formula, [tex]\Delta=b \frac{d}{2}[/tex]

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Answer:

-3

Step-by-step explanation:

to make it easier try 8-5 and then add a negative sign

1. The sequence is 2, 8, 16, 32.

2. The sequence is 4, 16, 64, 256.

A grouping of numbers in a specific order is known as a sequence. On the other hand, a series is described as the accumulation of a sequence's constituent parts.

For example, 3, 7, 11, 15, ... is a sequence as there is a pattern where each term is obtained by adding 4 to its previous term.

Given:

The first term of a sequence is 4.

1. let the common ratio 2.

Then, second term= 4 x 2= 8

third term = 8 x2 =16

fourth term = 16 x 2= 32

So, the sequence is 2, 8, 16, 32..

2. let the common ratio 4.

Then, second term= 4 x 4 = 16

third term = 16 x 4 = 64

fourth term = 64 x 4 = 256

So, the sequence is 4, 16, 64, 256.

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Answer:

[tex]\dfrac{2}{3}[/tex]

Step-by-step explanation:

To find the scale factor of the dilation of a figure, simply divide the x-value (or y-value) of a vertex of the dilated image Q'R'S'T' by the x-value (or y-value) of the corresponding vertex of the pre-image QRST.

[tex]\implies \sf Scale\;factor=\dfrac{x_{Q'}}{x_{Q}}=\dfrac{-2}{-3}=\dfrac{2}{3}[/tex]

[tex]\implies \sf Scale\;factor=\dfrac{y_{T'}}{y_{T}}=\dfrac{4}{6}=\dfrac{2}{3}[/tex]

Therefore, the scale factor is 2/3.

To find the scale factor of the dilation of a figure, first find the lengths of corresponding sides using the distance formula.

[tex]\boxed{\begin{minipage}{7.4 cm}\underline{Distance between two points}\\\\$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$\\\\\\where $(x_1,y_1)$ and $(x_2,y_2)$ are the two points.\\\end{minipage}}[/tex]

From inspection of the given diagram:

[tex]\implies QR=\sqrt{(x_R-x_Q)^2+(y_R-y_Q)^2}[/tex]

[tex]\implies QR=\sqrt{(3-(-3))^2+(6-9)^2}[/tex]

[tex]\implies QR=\sqrt{(6)^2+(-3)^2}[/tex]

[tex]\implies QR=\sqrt{36+9}[/tex]

[tex]\implies QR=\sqrt{45}[/tex]

[tex]\implies QR=3\sqrt{5}[/tex]

From inspection of the given diagram:

[tex]\implies Q'R'=\sqrt{(x_{R'}-x_{Q'})^2+(y_{R'}-y_{Q'})^2}[/tex]

[tex]\implies Q'R'=\sqrt{(2-(-2))^2+(4-6)^2}[/tex]

[tex]\implies Q'R'=\sqrt{(4)^2+(-2)^2}[/tex]

[tex]\implies Q'R'=\sqrt{16+4}[/tex]

[tex]\implies Q'R'=\sqrt{20}[/tex]

[tex]\implies Q'R'=2\sqrt{5}[/tex]

To find the scale factor of dilation that maps QRST onto Q'R'S'T', divide the length of Q'R' by the length of QR:

[tex]\implies \dfrac{Q'R'}{QR}=\dfrac{2\sqrt{5}}{3\sqrt{5}}=\dfrac{2}{3}[/tex]

Therefore, the scale factor is 2/3.

In Class 12, to find the domain and range of a function, you can use the following steps:

For example, if the function is f(x) = 1/x, the domain of the function is all real numbers except 0, because dividing by 0 is undefined. In this case, the domain of the function is (-∞,0) U (0,+∞)

For example, if the function is f(x) = √x, the domain of the function is all non-negative real numbers, because √x is only defined for non-negative values of x. In this case, the range of the function is [0,+∞)

Note that some functions may have more complex expressions, in such cases, you may have to use algebraic methods to find the domain and range.

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Answer:

2

Step-by-step explanation:

On solving the provided question, we can say that We can use the trigonometry sine to solve for the other side: sin 65 = y/20 => y = 18.126

The area of mathematics known as trigonometry examines the correlation between triangle side lengths and angles. The area first appeared in the Hellenistic era, around the third century BC. from the use of geometry in astronomical study.

We can arrange a right triangle with 20 feet as the hypotenuse and 65 degrees as the angle between the hypotenuse and adjacent side assuming that the ground and wall meet at a 90 degree angle. The side across from the angle would be the amount of feet the ladder extends up the wall

We can use the trigonometric function sine to solve for the other side:

sin 65 = y/20

y = sin(65) . 20

y = 18.126

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Displacement is the change in the position of an object relative to a reference point over a period of time.

It is usually represented by a vector quantity and is measured in meters (m). The formula for displacement is displacement = final position - initial position. Mathematically, displacement is denoted by s and is equal to the final position (x2) minus the initial position (x1), or s = x2 - x1. As an example, if a person walks a path of length 10 meters, starting at the origin (x1 = 0) and ending at x2 = 10, then their displacement would be s = 10 - 0 = 10 meters. To calculate displacement, we need to know the initial and final positions of the object, and the direction in which it moves.For example, if an object moves from position 5 m to position 10 m, the displacement is 5 m. This can be calculated by subtracting the initial position (5 m) from the final position (10 m). The result is 5 m, which is the displacement of the object.

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The length of the other leg of a right triangle, as per the Pythagoras theorem, is option B: 13.0 cm.

The Pythagorean theorem, sometimes known as Pythagoras' theorem, is a basic relationship between a right triangle's three sides in Euclidean geometry. According to this statement, the areas of the squares on the other two sides add up to the size of the square whose side is the hypotenuse. The calculation of the other leg of tbe triangle is given as follows.

According to the Pythagoras theorem:

(Hypotenuse)² = (Base)² + (Height)²

As per the question,

The height or the length of a leg of a right triangle is given equal to 11 cm and hypotenuse is given 17 cm. The other leg, or the base can be calculated as:

(Base)² = (Hypotenuse)² - (height)²

b² = (17)² - (11)²

b² = 289 - 121

b² = 168

b = √168

b = 12.96

or b = 13cm.

Thus, the base or the other leg of the right triangle is equal to 13 cm.

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Answer:

below

Step-by-step explanation:

Answer:

  in ℤ, successive values alternate signs

Step-by-step explanation:

You want to know what happens when the base of an exponential function is negative.

Consider the exponential function ...

  y = a·b^x

For b < 0 and integer values of x, the signs of the corresponding values of y will alternate.

Example

  y = 2·(-1)^x

A table of values will be ...

  [tex]\begin{array}{ccccccc}x&-1&0&1&2&3\\y&-2&2&-2&2&-2\end{array}[/tex]

For non-integer values of x, the values of y become more complicated. For fractional values of x, where x has an even denominator, the equation does not produce a real value. Instead, you get a complex number.

For fractional values of x where x has an odd denominator, the power is defined, and the sign will depend on whether the numerator is even or odd.

For irrational values of x, the function value in general is complex.

Of course, there are an infinite number of rational numbers between any pair of numbers on the number line, so the graph will have both positive and negative values, but will not be continuous. The attached graph can give you the idea. It is not in any way a complete graph of the function, but plots selected values.

__

Additional comment

The second attachment shows one of the uses of an exponential factor with a negative base. It creates the alternate signs of the series expansion of the sine function. Only whole number exponents are used in this case.

The rate at which the distance is decreasing is - 30 centimeters per second. Ravi's distance from the first floor when he stepped on escalator is 1250 centimeters.

The pace at which one quantity changes in relation to another quantity is known as the rate of change function. Simply said, the rate of change is calculated by dividing the amount of change in one thing by the equal amount of change in another.

a. From the table we can observe that as time increases, his distance from the first floor decreases.

The rate at which the distance is decreasing is given by:

Rate = (d2 - d1)/ (t2 - t1)

= (980 - 1070) / (9 - 6)

= -90 / 3

= -30

Hence, the rate at which the distance is decreasing is - 30 centimeters per second.

b. Ravi's distance from the first floor when he stepped on escalator is calculates as:

d - d1 = m(t - t1)

where, m is the rate.

Here, m = -30.

d - 1070 = (- 30) (t - 6)

d = -30t + 180 + 1070

d = -30t + 1250

The time when he stepped on escalator is 0.

d = -30(0) + 1250

d = 1250

Hence, Ravi's distance from the first floor when he stepped on escalator is 1250 centimeters.

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Complex numbers and real numbers cannot be directly compared as they are from different number systems.

Complex numbers have both a real and an imaginary component, whereas real numbers only have a real component. However, you can compare the magnitudes (absolute values) of complex numbers with real numbers.

The magnitude of a complex number is the distance from the origin in the complex plane, represented by the absolute value or modulus of the complex number, which is always a positive real number. By comparing the magnitudes of complex numbers, you can determine which one is larger or smaller.

For example, the magnitude of 3 + 4i is 5, and the magnitude of 2 + 3i is 3.5. Therefore, 3 + 4i has a larger magnitude than 2 + 3i.

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solution for the two equation is x = 1, and y = - 2

It is a mathematical term that acts as the substitute of variables present in one or more equations. It is the value of unknown numbers that makes an equation true.

equation given, y = - 4x + 2

                    y = 6x - 8

if we use addition method then y = - 4x +2

                                                    y = 6x -8

                                                 -        -    +

                                          0       = - 10x + 10

                                         10 x = 10

                                          x = 1

                      putting the value of x in one of the above equations we get the y value.

                                  y = 6×1 -8

                                y = -2

the solution is the x = 1 and y = - 2

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An expression for the change she will receive is 8b - 100 = 100

You should be aware that an expression in math is a sentence with a minimum of two numbers or variables and at least one math operation

The given parameters are

Nathan buys 9 items

She gives the cashier $100

The expression 8(b) -100 = 100%

Where 100 is the full amount payable

Therefore, the expression becomes 8b -100=100

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Answer:1558

Step-by-step explanation:

Answer:1558

Step-by-step explanation:

[tex]82\\19[/tex]

put a line under it multiply the 9x2 and then 9x8 make sure to carry

put a zero under the 8 and multiply 1x2 and 1x8

now add the the numbers together

you get 1558

The value of X that satisfies both -9X + 4Y = 8 and -3X - Y = 4 given the same value of Y is X = -8/7.

An equation is a mathematical statement that shows that two mathematical algebraic expressions are equal. For example, x + 7 = 10 is an equation, in which x + 7 and 10 are two expressions separated by an 'equal to' sign.

An equation also has two sides, the let hand side and the right hand side.

Solving the two equations simultaneously we have:

-9x + 4y = 8 --- (1)

-3x - y = 4 --- (2)

Multiply 2 by 3 and subtract from (1) as shown below

-9x + 4y = 8

-9x - 3y = 12

------------------

0 + 7y = - 4

7y = -4

y = -4/7

Substituting the value of y in equation 2 we get the value of x.

-3x - (- 4/7) = 4

-3x + 4/7 = 4

-3x = 4 - 4/7

-3x = 24/7

x = -8/7

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Answer:

[tex]2(3p - 2) - (p + 4) = 3p \\ \\ \dashrightarrow \: 6p - 4 - p - 4 = 3p \\ \\ \dashrightarrow \: 5p - 8 = 3p \\ \\ \dashrightarrow \: 5p - 3p = 8 \\ \\ \dashrightarrow \: 2p = 8 \\ \\ \dashrightarrow \: p = 4[/tex]

hope helpful :-;

Answer:

x = 10

Step-by-step explanation:

Because the triangles are similar, the following equations must be solved in order to find out how much bigger or smaller the triangle is.

10 * y = 15

16 * y = 24

You'll find that

y = 1.5

Then, you are able to insert y into the following equation and solve for x

(x - 4) * y = 9

(x - 4) * 1.5 = 9

1.5x - 6 = 9

1.5x = 15

x = 10

We can plug x back into the previous equation in order to check if it is correct

(x - 4) * 1.5 = 9

(10 - 4) * 1.5 = 9

6 * 1.5 = 9

9 = 9

Answer:

I'm sorry, I don't have enough information to answer that question. How much of the wall has already been painted?

Answer: Here is my question

Step-by-step explanation:

The answer is B: 1/16

The value of the discriminant b² - 4ac is 73.

The number of real solutions the equation has is two.

An equation is a mathematical statement that is made up of two expressions connected by an equal sign.

Example:

2x + 4 = 9 is an equation.

We have,

-2x² - 3x + 8 = 0

This is in the form of ax² + bx + c = 0

a = -2, b = -3, and c = 8

Now,

b² - 4ac

= (-3)² - 4 x (-2) x 8

= 9 + 64

= 73

This is a positive value.

This means,

The equation has two real solutions.

Thus,

The equation has two real solutions.

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The solutions to the different sides and values of square are given below. The length of the side of the square is 6.71m.

Square is a polygon which four equal sides and all angles are right- angles.

Given area of square = 45 m²

     Area = side²

     Side = √Area = √45 = 6.71 m

Therefore side of the square is 6.71m.

41) Negative numbers do not have square roots.

Therefore √-4 is undefined.

42) Option D is correct as it is not a fraction.

43) Any number multiplied by zero is zero.

Therefore (a) is the correct option.

44) When y = 15, x = 3

   For direct variation, y =kx

so k = y/x =15/3 = 5

When x=5, y = kx =5*5 = 25

Therefore (a) is correct.

45) For inverse variation

   MN = k

  Given 5*3 = k

k=15

When M = 10 , N = k/M = 15 /10 = 3/2

Therefore option a is correct.

48) Let the amount of work be W

     For 3 men,

          8 days = W

             1 day = W/8

Now work done by 1 man in one day = (W/8) /3 =W/24

In six days, work done by one man = W/24 * 6 = W/4

Therefore for the work to be completed, the number of men required is 4 (W/4 *4 = W).

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