Which expression is equivalent to 7k+13-4K+10+5k-6

A.6n+90
B.14+72
C.6n+72
D.14n+90

The dimensions of the rectangle by factoring the area are

Length =  ( 2x + 7 )

breadth = ( 2x - 7 )

The number of unit squares that can fit inside a rectangle called its area. The area of a flat surface of a specific form is the space that it occupies.

Area of Rectangle = (Length × Breadth)

The area of a rectangle given is (4x²-49) square units.

We know the formula ,

Area of rectangle = Length × breadth

(4x²-49) = Length × breadth

Length × breadth = (2x)² - (7)²

Length × breadth = ( 2x + 7 ) ( 2x - 7 )

Therefore, the dimensions of the rectangle by factoring the area are

Length =  ( 2x + 7 )

breadth = ( 2x - 7 )

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A regression line is a line of​ means, and outliers have a big effect on the regression line.

Regression:

Regression is a statistical method used in finance, investing, and other disciplines that attempts to determine the strength and character of the relationship between a dependent variable (usually denoted by Y) and a set of other variables (called variables independent). Also known as simple regression or ordinary least squares (OLS), linear regression is the most common form of this technique. Linear regression establishes a linear relationship between two variables based on a line of best fit. So the linear regression is plotted with a straight line and the slope defines how changes in one variable affect changes in the other variable.

Regression Line:

Regression lines are very useful for the forecasting process. The purpose of this line is to describe the relationship between the dependent variable (variable Y) and one or more independent variables (variable X). Using the equation obtained from the regression line, the analyst can predict the future behavior of the dependent variable by entering different values ​​for the independent variable. Regression lines are widely used in the financial industry and in business in general.

The regression line formula is like the following:

Y = a + bX + u

The multiple regression formula looks like this:

Y = a + b₁X₁ + b₂X₂ + b₃X₃ + … + btXt +u.

Y is the dependent variable

X is the independent ones

a is the interception point

b is the slope

u is the residual regression.

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Answer:

Step-by-step explanation:

The statement "x = y² - 9" is not a function because for some values of y, there are multiple corresponding values of x.

A relation between a set of inputs and outputs is known as a function. A function is, to put it simply, a relationship between inputs in which each input is connected to precisely one output. Each function has a range, codomain, and domain. The usual way to refer to a function is as f(x), where x is the input. A function is typically represented as y = f. (x).

Now in the given question ,

In particular, when y = 3, there are two possible values of x (x = 0 and x = 6), so (3, 0) and (3, 6) are two points on the graph of this equation. This violates the definition of a function, which states that for each input (in this case, y), there can only be one output (x). The other statements are not relevant to determining whether the equation is a function.

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The solution to the inequality is x ≤ 1.

Inequality in mathematics is when two values are not equal. It can be expressed using symbols such as >, <, ≥ and ≤. This can be used to compare two values, express a range of values, or indicate that one value is greater or less than another. Inequality is a powerful tool for solving mathematical problems, as it can be used to deduce relationships between different variables.

To solve this inequality, we must first perform the operations on the left side of the equation to get an expression equal to 4. We can start by simplifying the fraction on the left side of the equation. We can multiply both the numerator and denominator by x, which will give us 5x - 3 = x + 2x. We can then add 3 to both sides to get 5x = 3 + 2x, which can then be simplified to 3x = 3. Finally, we can divide both sides by 3 to get x = 1. Therefore, the solution to the inequality is x ≤ 1.

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Answer:

24 years old

Step-by-step explanation:

Jim = 2x + 4

Mark = x

Sum of their ages = 34

2x + 4 + x = 34

2x + x = 34 - 4

3x = 30

3x / 3 = 30 / 3

x = 10

Mark = 10 years old

Jim = 2x + 4

= 2 ( 10 ) + 4

= 20 + 4

= 24

Therefore, Jim is 24 years old

A correlation coefficient based on an observational study cannot be used to support a claim of cause and effect, as correlation does not imply causation.

Correlation is a statistical measure that describes the strength and direction of a relationship between two variables. A correlation coefficient ranges from -1 to 1, where -1 indicates a strong negative correlation, 0 indicates no correlation, and 1 indicates a strong positive correlation. Correlation does not imply causation, meaning that just because two variables are correlated does not mean that one causes the other.

In an observational study, researchers observe and record data on variables of interest without manipulating them directly. These studies are often used in fields such as epidemiology, social sciences, and psychology to investigate relationships between variables and identify potential risk factors for diseases or other outcomes.

Observational studies can suggest possible relationships between variables, but they cannot prove causation. This is because there may be other factors that are influencing the relationship between the variables, and these factors cannot be controlled or accounted for in an observational study. In order to establish causation, researchers need to conduct experiments where they can manipulate the variables and control for other factors that may influence the outcome.

Therefore, a correlation coefficient based on an observational study cannot be used to support a claim of cause and effect, as correlation does not imply causation.

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The number of the ways to seat the jury members around a circular table for deliberations are 5040.

A permutation is a word that describes the number of ways things can be ordered or arranged.

Given that, we need to find that how many ways are there to seat the jury members around a circular table for deliberations,

We know that,

There are (n-1)! ways to seat n people at a circular table,

Since, there are no number of people is given, let us assume that there are 8 members,

Therefore,

The number of ways to seat the jury members around a table =

(8-1)! = 7!

= 5040

Hence, the number of the ways to seat the jury members around a circular table for deliberations are 5040.

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Fake Lava Recipe is described below:

                                 Batch 1                Batch 2

Baking soda               1                             6

Vinegar                       3/4                         4.5

Dish Soap                  1/4                           1.5

Baking soda is described as a chemical compound with the formula NaHCO₃ and it is known as a salt composed of a sodium cation and a bicarbonate anion.

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There are 5 more servings of Uma's cereal than of Cam's cereal.

From the question, we have the following parameters that can be used in our computation:

y = -1.25x + 15

For Uma;s box, we have

Initial = 12.75

Rate = 0.75

This means that

y = -0.75x + 12.75

Set y = 0 and solve for x

y = -1.25x + 15 = 0

1.25x = 15

x = 12

y = -0.75x + 12.75 = 0

0.75x = 12.75

x = 17

By comparison, we have

17 - 12 = 5

Hence, there are 5 more servings of Uma's cereal than of Cam's cereal.

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The simplified answer is [tex]-16n^2 - 4n - 4.[/tex]

In mathematics, simplification refers to the process of simplifying an expression or equation without affecting its fundamental meaning or value. Using mathematical tools and rules to simplify an equation makes it simpler to manipulate or solve.

In algebra, simplification might take the form of factoring out common factors, grouping like concepts, or distributing multiplication across addition or subtraction. For instance, merging two like terms will simplify the formula 2x + 4x to 6x. The same strategy can be used to reduce the expression 3(x + 2) - 2(x - 1) to 3x + 4 by spreading out the multiplication and combining related terms.

Other types of mathematical simplification include determining the square root of a number, simplifying trigonometric functions, and reducing fractions to their simplest forms. In order to solve difficulties and comprehend mathematical concepts, simplification is a crucial step that removes superfluous complexity and facilitates understanding of the underlying structure of an equation or problem.

To find the product of 4 and the expression [tex](-4n^2 - n - 1),[/tex] we can distribute the 4 to each term inside the parentheses:

[tex]4(-4n^2 - n - 1) = -16n^2 - 4n - 4[/tex]

Therefore, the simplified answer is [tex]-16n^2 - 4n - 4.[/tex]

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The number of rational zeroes in f(x) = 4x⁴ - x³ + 3x² - 4x - 6 is 12.

The rational root theorem explains how a polynomial's roots and coefficients are related. It explains the kind of rational roots that the polynomial might have in particular.

According to the rational root theorem, the possible roots of a polynomial of degree three and above are,

± (coefficient of the last term)/(coefficient of the first terms).

Given, A polynomial function f(x) = 4x⁴ - x³ + 3x² - 4x - 6.

Now, The rational roots are ± (a₄)/(a₀).

= (± 1, ± 2, ± 3, ± 6)/(± 1, ± 2, ± 4).

Therefore, The possible number of rational zeroes is 4×3 = 12.

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The right choice for the equation is y+9=4(x-3). The Option B is correct..

An equation of the line refers to a linear equation having a degree of one. The equation contains two variables x and y. And the third parameter is the slope of the line which represents the elevation of the line.

First thing to do is to solve each of these for y.  The first one is y=-4x-3; the second one is y=4x-21; the third one is y=4x+21; the fourth one is y=-4x+3.  From that, you can tell the positive slopes are found in the second and third equations.  

Those are the ones we will test now for the point (3, -9).  y=-9 and x=3, so let's fill in accordingly.  The second equation filled in is -9=4(3)-21.  

-9=12-21 and -9=-9.  So the second one works.  Just for the sake of completion, let's do the same with the third: -9=4(3)+21.  Does -9=12+21?  Of course, it doesn't. Our equation is the second one above, y+9=4(x-3).

The complete question is given below:

Select the equation that contains the point (3, -9), and in which the graph of the line has a positive slope.

y – 9 = –4(x + 3)

y + 9 = 4(x – 3)

y – 9 = 4(x + 3)

y + 9 = –4(x - 3)

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Since the given functions represent the cost for water and sewer separately, the total cost will be the sum of both.

For water usage, W(x) = 0.129x, where x is the number of 100-gallon units of water used. So, for 3800 gallons, we have:

W(x) = 0.129 * (3800/100) = $4.91 (rounded to the nearest cent)

For sewer usage, S(x) = 0.158x + 16.22, where x is the number of 100-gallon units of water used. So, for 3800 gallons, we have:

S(x) = 0.158 * (3800/100) + 16.22 = $21.12 (rounded to the nearest cent)

Therefore, the total amount a homeowner will pay for 3800 gallons of water and sewer usage for one month is:

Total cost = W(x) + S(x) = $4.91 + $21.12 = $26.03 (rounded to the nearest cent)

So, the closest answer choice is C. $27.13.

The areas of the compound figures are following;

1). The area of the compound figure,

= 121.12 square feet.

2). The area of the compound figure = 128 square meters.

3). The area of the compound figure = 69 square centimeters.

4). The area of the compound figure,

= 53.12 square feet.

5). The area of the compound figure,

= 63 square meters.

6). The area of the compound figure,

= 108 square yards.

The area is the amount of area occupied by an object's flat (2-D) surface or shape.

Given:

The area of the compound shapes can be calculated by the following process,

1). The area of the compound figure,

= (12 x 8) + (1/2 x 3.14 x 4 x 4)

= 121.12 square feet.

2). The area of the compound figure,

= (13 x 8) + (1/2 x 8 x 6)

= 128 square meters.

3). The area of the compound figure,

= (11 x 4) + (5 x 5)

= 69 square centimeters.

4). The area of the compound figure,

= (1/2 x 3.14 x 4 x 4) + (1/2 x 8 x 7)

= 53.12 square feet.

5). The area of the compound figure,

= (7 x 7) + (1/2 x 7 x 4)

= 63 square meters.

6). The area of the compound figure,

= (12 x 6) + (6 x 6)

= 108 square yards.

Therefore, all the areas are given above.

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The scale factor produced in Figure 2 from Figure 1 is 3 over 7.

The scale factor defines a variable in a ratio of two different measurements.

Sometimes drawings of large models are represented in a scale factor of a smaller unit.

A triangle is a three-sided closed-plane figure formed by joining three noncolinear points.

Given, Two right triangles Δ₁ and Δ₂, where the legs of Δ₂ is 7 units long and the legs of  Δ₁ is 3 units long.

Therefore, The scale factor produces in Figure 2 from Figure 1 is Δ₂/Δ₁,

= 3/7.

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The maximum distance as function of the quantity of gallons of gasoline the required expression is: x = 0.2272 . n

Distances between two things or places can sometimes be measured qualitatively and sometimes quantitatively. A physical length or an estimate based on other criteria might be referred to as distance in physics or everyday language. The entire movement of an item, independent of direction, is called distance. No matter where an item starts or ends, distance may be described as the amount of ground it has covered.

The maximum distance as function of the quantity of gallons of gasoline is estimated by the following linear model:

x = (14,430 km / 63500 gallons) . n

Finally, the required expression is:

x = 0.2272 . n

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There are about 6 "basic" types but there could be more

A quadrilateral is a closed shape and a type of polygon that has four sides, four vertices and four angles. It is formed by joining four non-collinear points. The sum of interior angles of quadrilaterals is always equal to 360 degrees.

Quadrilateral Types:

We have the following system of equations,

[tex]\left \{ {{y=x^2-1} \atop {y=5-x}} \right.[/tex]

We are asked to solve the system of equations using substitution.

What is substitution?

Substitution is a method of solving a system of equations where you solve for one of the equations (pick either equation) for one of the variables (pick one of the variables), then using this new equation to "substitute" back in to the other.

Given this set of equations, [tex]\left \{ {{y=x^2-1} \atop {y=5-x}} \right.[/tex], notice how both of the equations are already solved for the variable, [tex]y[/tex]. Since both these equations equal [tex]y[/tex], we can set them equal to each other and solve for, [tex]x[/tex].

[tex]\left \{ {{y=x^2-1} \atop {y=5-x}} \right.[/tex]

[tex]\Longrightarrow 5-x=x^2-1[/tex], substituted "[tex]5-x[/tex]" for [tex]y[/tex] into the top equation.

[tex]\Longrightarrow -x^2-x+6=0[/tex]

[tex]-1[\Longrightarrow -x^2-x+6=0][/tex]

[tex]\Longrightarrow x^2+x-6=0[/tex]

[tex]\Longrightarrow (x-2)(x+3)=0[/tex]

[tex]\Longrightarrow x=2 \ and \ x=-3[/tex]

Now take these values of x ([tex]x=2 \ and \ x=-3[/tex]) and plug them into either of the two original equations to solve for [tex]y[/tex].

When x=2:

[tex]y=5-x;x=2[/tex]

[tex]\Longrightarrow y=5-(2)[/tex]

[tex]\Longrightarrow y=3[/tex]

When x=-3:

[tex]y=5-x;x=-3[/tex]

[tex]\Longrightarrow y=5-(-3)[/tex]

[tex]\Longrightarrow y=5+3[/tex]

[tex]\Longrightarrow y=8[/tex]

Thus, we get two solutions to the given system of equations, (-3,8) & (2,3).

To convert 1 cubic centimeter (cc) to ounces (oz), apply conversion factor between the two units. The conversion factor is:

1 cc = 0.033814 oz

This means that one cubic centimeter is equivalent to 0.033814 ounces.

Therefore, the mathematical expression to convert 1 cc to oz is:

1 cc * (0.033814 oz/cc) = 0.033814 oz

So, 1 cc is equal to 0.033814 ounces.

A conversion factor is a mathematical expression that expresses the relationship between two units of measurement. It is used to convert measurements between units.

Conversion factors are commonly used to convert measurements between different units of measurement in math, science, and engineering. They are a useful tool for performing calculations and comparing data in various units.

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One milligram(mg) is equal to 1000 micrograms(mcg).

One microgram is equivalent to one millionth of a gram since the word "micro" in micrograms refers to one millionth. The prefix "milli" in milligrams, on the other hand, denotes a thousandth, making 1 milligram equivalent to a thousandth of a gram.

Given that 1 milligram is equivalent to 1000 micrograms, it is simple to convert between micrograms and milligram. In several fields, notably medicine, where accurate quantities of medications and other chemicals are frequently measured in micrograms or milligram, this translation is crucial.

The conversion between various metric prefixes is a key feature of the metric system, which is often used to represent measurements of mass, length, and volume.

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The parametric vector form of the matrix is AX = < t 0 3/5t> where t is any real number.

Matrices are an important mathematical tool that can be used to represent and solve a wide array of problems.

In this problem, we are given a matrix A, which is row equivalent to the given matrix [1 -3 -8 5 0 12 -4] and asked to describe all solutions of Ax = 0 in parametric vector form.

To answer this question, we first need to use row operations to transform the given matrix into row-echelon form. After applying row operations, the matrix becomes [1 0 -5/3 0 2/3 0 1].

We can now use this matrix and the equation Ax = 0 to identify the solutions in parametric vector form.

The first column of the matrix has a coefficient of 1, indicating that x₁ is free and can take on any real value.

The second column has a coefficient of 0, indicating that x₂ = 0.

The third column has a coefficient of -5/3, indicating that x₃ = 3/5t, where t is a real number.

Then the resulting vector form is written as,

=> AX = < t 0 3/5t> where t is any real number.

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Symbolab is the best derivative calculator that solves first derivatives, second derivatives, higher order derivatives, one point derivatives, partial derivatives, implicit derivatives, derivatives with definition and more.

Symbolab Derivative Calculator is free online tool for calculating derivatives of functions. It allows users to input the equations and then calculates the derivatives of those equations for the user. This tool is useful for students and professionals who need to calculate derivatives quickly and accurately.

The calculator supports a variety of mathematical functions, including exponential, polynomial, logarithmic and trigonometric functions. It also allows users to graph derived functions. The calculator is easy to use and can also save users time and effort. It can also be used to check the correctness of the derivative of a function.

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The NumPy matrix inverse is a function that calculates the inverse of a given square matrix.

The NumPy matrix inverse function is a strategy that works out the opposite of a square grid involving the NumPy library in Python. The inverse of a matrix is a matrix that, when duplicated by the first grid, creates the identity matrix.

In NumPy, the matrix inverse function is executed as the linalg.inv() technique, which takes a NumPy cluster as information and returns its converse as an exhibit. The matrix should be square and invertible, the importance of its determinant isn't equivalent to nothing. The matrix inverse is utilized in different fields of math, designing, and science to solve systems of linear equations, track down the eigenvalues and eigenvectors of a network, and perform different procedure on matrices.

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The probability that Ron gets his first hit-by-pitch of the playoffs in his first 15 plate appearances is 52.34%

A probability is a number that reflects the chance or likelihood that a particular event will occur. Probabilities can be expressed as proportions that range from 0 to 1, and they can also be expressed as percentages ranging from 0% to 100%.

Given that, in a recent baseball season, Ron was hit by pitches 22 times in 615 plate appearances during the regular season.

We need to find the probability that Ron gets his first hit-by-pitch of the playoffs in his first 15 plate appearances.

The random variable X= number of times Ron is hits by pitches in 22 plate appearances  follows, a binomial distribution.

P(X=x) = n! / (x!(n-x)!)pˣ(1-p)ˣ

where,

n = plate appearances = 22

p = probability of being hit by pitches = 15 / 615 = 3 / 123 = 1/41

x = number of successes = 1

Substitute the values :-

P(X=1) = 22! / (22-1)! × (1/41)(40/41)

= 0.5234

= 52.34%

Hence, the probability that Ron gets his first hit-by-pitch of the playoffs in his first 15 plate appearances is 52.34%

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A $100 bill and a dime differ by a magnitude of 3.

Orders of magnitude can be used in order to define large quantities efficiently and more easily. A dime is a currency used in the US that is equivalent to 0.10 dollars.

So we can represent a dime as 10-¹ of a dollar

and we can write 100 dollars as 10² of a dollar.

Therefore the difference in the order of magnitude of 100 dollars and a dime would be the difference between the powers or exponents of those two quantities,

That is,

2-(-1) = 3

So, the dollar differs by a magnitude of 3 from a dime.

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The area of the rectangle is 23.375 sq feet.

What is area of rectangle ?
The area of a rectangle is the product of its length and width. It is a measure of the region enclosed by the rectangle. In the context of geometry, the area is expressed in square units, such as square inches, square feet, or square meters.

Given by the question:
To find the area of the rectangle, we need to multiply the length and width.

Length = 2 3/4 feet = 11/4 feet

Width = 8 1/2 feet = 17/2 feet

Area = Length x Width

Area = (11/4) x (17/2)

Area = 93.5/4 sq feet

So the area of the rectangle is 23.375 sq feet (when rounded to three decimal places).

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The net of the triangular prism is a combination of the two triangles and three rectangles.

A prism is a solid figure having two bases that are the same in size and shape, flat faces, and a continuous cross-section. The two bases of a prism, which can be triangles, rectangles, or any other polygon, determine the name of the prism in question.

Prisms having triangle bases, for instance, are referred to as triangular prisms, whereas those with square bases are referred to as square prisms, and so on. Three rectangle lateral sides and two triangular bases make up a triangular prism.

A triangular prism is a three-dimensional (3D) object having two identical triangle-shaped faces joined by three rectangular faces. The bases are the triangle faces, while the lateral faces are the rectangular faces. The top and bottom (faces) of the prism are other names for the bases.

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In reference to the article “Climate Change and Ecosystems,” the EPA  explains how the Earth's ecosystems are being impacted by climate change, resulting in negative consequences for both natural resources and human well-being.

In response to widespread public environmental concerns that grew in strength in the 1950s and 1960s, the Environmental Protection Agency was established. By examining the effects of pollutants and setting usage restrictions, the EPA has worked to preserve and protect the environment while also enhancing human health.

The EPA controls the production, transformation, use, and disposal of chemicals and other pollutants. The EPA is also tasked with figuring out the acceptable levels of chemicals and other pollutants in water, animal feed, and food.

In general, the Environmental Protection Agency develops and implements environmental regulations, sponsors and conducts research, and guards against serious health risks to people and the environment and also maintain a favorable climate for all.

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Answer:

[tex]2x^{2}[/tex] + [tex]2x[/tex] + [tex]2[/tex]

Step-by-step explanation:

1. In the expression: C - 3D, we plug in the values of C and D

2. So we get the expression: [tex](2x^{2} + 5x -1) - 3(x - 1)[/tex]

3. Then we simplify this even more: [tex](2x^{2} + 5x -1) - (3x + 1)[/tex] by multiplying 3 to the numbers in the parentheses

4. Now we can remove the parentheses: [tex]2x^{2} + 5x - 1 - 3x + 3[/tex]

5. Now we can put the like terms next to each other: [tex]2x^{2} + 5x - 3x + 3 - 1[/tex]

6. FINALLY we simplify: [tex]2x^{2} + 2x + 2[/tex]

Hope this helps! <3

The actual size of 2×4 is 1.5 inches by 3.5 inches

The measurement is 2 × 4

Assuming you are referring to lumber sizes, a 2x4 piece of lumber has actual dimensions of 1.5 inches by 3.5 inches

If we convert to the centimeter then the actual size will be 3.81 cm by 8.89 cm

The name "2x4" refers to the rough dimensions of the lumber before it is planed and smoothed, which are typically about 2 inches by 4 inches. However, the planing process reduces the size of the lumber by about 0.5 inches in both dimensions.

Therefore, the actual size is 1.5 inches by 3.5 inches

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