Which of the following ordered pairs represents the point plotted and labeled A?

The x-axis starts at negative 4 with tick marks every unit up to positive 4. The y-axis starts at negative 4 with tick marks every unit up to positive 4. Point D is three units left of the origin. Point A is three units left and three units up from the origin. Point C is three units left and three units down from the origin. Point F is two units up from the origin. Point B is two units right and three units up from the origin. Point E is three units right and two units down from the origin.

(−3, −3)
(−3, 3)
(3, −3)
(3, 3)

The weighted average of the numbers −4 and 5, with weight three-fifths on the first number and two-fifths on the second number is option (b) -0.4

The weighted average of two numbers is calculated by multiplying each number by its corresponding weight, adding the results, and then dividing by the total weight.

In this case, the first number is -4 and its weight is 3/5, while the second number is 5 and its weight is 2/5. Therefore, the weighted average can be calculated as follows:

weighted average = (-4)(3/5) + (5)(2/5)

= -12/5 + 10/5

Add the numbers

= -2/5

= -0.4

Therefore, the correct option is (b) - 0.4

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According to the scree plot, if we want to preserve 80% of the variance, the smallest projection dimension d would be 5.

The scree plot is a diagnostic tool in factor analysis that aids in determining the number of significant factors to retain. It plots eigenvalues against factor number, with the first factor representing the highest variance in the data set.

The scree plot represents the eigenvalues of the factors. The total variance in the original dataset can be expressed as the sum of the eigenvalues of the factors. If we choose to retain fewer factors, the overall variance preserved will be less, resulting in less precise results.

If we want to keep the most variance possible while maintaining a reasonable level of abstraction, we can look at the scree plot's “elbow.” This represents a point on the scree plot where the eigenvalues decrease dramatically.

Therefore, We should retain all of the factors to the left of the elbow, as they represent the most significant eigenvalues that account for the most variance in the data. If we want to preserve 80% of the variance, the smallest projection dimension d would be 5.

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Answer:

The rate of interest applied for compound interest is 24.5 %  

The rate of interest applied to simple interest is 37.5 %

Step-by-step explanation:

Given as :

The Principal amount that is deposited = $ 800

The Time period = 24 months = 2 years

The Interest earn = $ 200

Let the rate of interest = R %

So, The Amount = Principal deposited - interest earn

Or, A = $ 800 - $ 200

∴ Amount = $ 600

From compounded method

Amount = Principal ×

Or, $ 600 = $ 200 ×

Or,  =

Or, 3 =

Or,  = (1 +)

Or, 1.245 = (1 +)

or, 1.245 - 1 =

or, 0.245 × 100 = R

So, the rate is = 24.5 %

Hence The rate of interest applied fro compound interest is 24.5 %  Answer

From Simple Interest method

Simple Interest =

Or, $ 600 =

Or,  $ 600 × 100 = $ 800 × R × 2

Or, R =

∴ R = 37.5 %

So, The rate is 37.5 %

Hence The rate of interest applied to simple interest is 37.5 % Answer

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M∠4 is therefore equivalent to 102.5 degrees as Angles 1 and 3 are the opposing interior angles .

Angles are geometric shapes created by two rays that have a similar terminus, or vertex. Often, the rays are depicted as straight lines with arrows pointing in the appropriate directions. Angles are expressed in degrees, with 360 degrees being a full circle. Angles that are less than 90 degrees are referred to as acute angles, those that are precisely 90 degrees are referred to as right angles, those that are between 90 and 180 degrees are referred to as obtuse angles, and those that are exactly 180 degrees are referred to as straight angles.

given

Angles 1 and 3 are the opposing interior angles in this case, and the exterior angle 4 of a triangle is equal to the total of these angles. We thus have:

m∠4 = m∠1 + m∠3\sm∠4 = 45° + 57.5°

m∠4 = 102.5°

M∠4 is therefore equivalent to 102.5 degrees as Angles 1 and 3 are the opposing interior angles .

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Answer:

The horizontal distance between the two x-intercepts is 7 units.

Step-by-step explanation:

The x-intercepts are the points at which the graph of a function or equation crosses the x-axis.  At these points, the value of y is zero.

Therefore, to find the x-intercepts of the given expression, set the expression equal to zero and solve for x:

(x - 3)(x + 4) = 0

This equation is true if and only if either x - 3 = 0 or x + 4 = 0, which means the x-intercepts are at x = 3 and x = -4.

The horizontal distance between these two points is the absolute value of the difference between the x-coordinates of the x-intercepts:

|3 - (-4)| = |3 + 4| = 7

Therefore, the horizontal distance between the two x-intercepts is 7 units.

The constant angular acceleration of the centrifuge is approximately [tex]-331283[/tex] rad/min² in the negative direction.

To find the constant angular acceleration of the centrifuge, we can use the following kinematic equation:

ω² = ω₀² + 2αθ

Here, ω is the final angular velocity (0 rad/min, since it comes to rest), ω₀ is the initial angular velocity (3450 rev/min), α is the constant angular acceleration we want to find, and θ is the angular displacement (45.8 revolutions).

First, we need to convert the given angular values to radians. We know that 1 revolution equals 2π radians.

Initial angular velocity, ω₀ = 3450 rev/min × 2π rad/rev = 6900π rad/min

Angular displacement, θ = 45.8 rev × 2π rad/rev = 91.6π rad

Now, substitute the values into the kinematic equation:

[tex]0 = (6900π)² + 2α(91.6π)[/tex]

[tex]α = - (6900π)² / (2 × 91.6π)[/tex]

[tex]α ≈ -331283 rad/min²[/tex]

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The standard error for the sample proportion of 150 teachers in an inner-city school district is found to be 0.037.

The formula for the calculation of the standard error of a sample proportion is below,

SE = √((p × (1 - p)) / n)

Here,

SE is the standard error of the sample proportion

p is the sample proportion (in decimal form)

n is the sample size

In the mentioned case, the sample proportion is 0.72 (since 72% of 150 is 108), and the sample size is 150. Substituting these values into the formula, we will be getting,

SE = √((0.72 × (1 - 0.72)) / 150)

SE = √((0.2052) / 150)

SE = √(0.001367)

SE = 0.037

Therefore, the standard error of the sample proportion is 0.037.

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As a result, the vertices' values when mirrored along the x-axis are W' (-5,-0), X' (0,-2), and Y'. (-1,3).

In this case, coordinates refer to the edges of a grid structure. Latitude and longitude are often combined to form GPS measurements. Lines of latitude measure how far north and south are from the center of the earth, which is located at 0 degrees north and south.

When a point is reflected across the x-axis, the y-coordinate changes sign while the x-coordinate remains the same.

For point W (-5,0), reflecting across the x-axis results in the point W' (-5,-0).

For point X (0,2), reflecting across the x-axis results in the point X' (0,-2).

For point Y (-1,-3), reflecting across the x-axis results in the point Y' (-1,3).

Therefore, the coordinates of the vertices when reflected across the x-axis are:

W' (-5,-0), X' (0,-2), Y' (-1,3).

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The probability that Arianna will lose a turn is impossible.

In probability, impossible events have a probability of 0. This means that there is no chance that the event will occur. In this case, the probability that Arianna will lose a turn on her next turn is 0, which means that it is impossible for her to lose a turn.

In probability theory, the term "probability" refers to the likelihood of an event occurring. It is typically expressed as a value between 0 and 1, with 0 indicating that the event is impossible and 1 indicating that the event is certain.

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The expected number of boxes of cereal that must be purchased to obtain at least one of each of the four different prizes is 1.

Let X be the number of boxes of cereal that need to be purchased to obtain at least one of each of the four different prizes. We want to find E(X), the expected value of X.

To do this, we can use the concept of the geometric distribution. The probability of obtaining a new prize in a box of cereal is given by:

p = 4/4 = 1 (since there are four different prizes)

The probability of not obtaining a new prize in a box of cereal is

q = 1 - p = 0

Therefore, X follows a geometric distribution with parameter p = 1. The expected value of a geometric distribution with parameter p is

E(X) = 1/p

So in this case, we have

E(X) = 1/1 = 1

This means that on average, the family will need to purchase one box of cereal to obtain at least one of each of the four different prizes.

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To find two divergent series, summation from n equals 1 to infinity of a_n and summation from n equals 1 to infinity of b_n, such that their product converges, we can consider the following series:

1. Summation from n equals 1 to infinity of a_n = ∑(1/n)
2. Summation from n equals 1 to infinity of b_n = ∑n

Solution:

1. The first series, ∑(1/n), is known as the harmonic series. It is a famous example of a divergent series, meaning that its sum approaches infinity as n approaches infinity.

2. The second series, ∑n, is an arithmetic series where the terms increase linearly. This series is also divergent, as the sum increases without bound as n approaches infinity.

Now, we need to verify that the product of these series converges:

3. Summation from n equals 1 to infinity of (a_n * b_n) = ∑((1/n) * n)

4. Simplifying the expression, we get ∑(1), which is a constant series with all terms equal to 1.

5. The sum of the constant series converges, as it approaches a finite value when n approaches infinity.

In conclusion, the two divergent series summation from n equals 1 to infinity of a_n = ∑(1/n) and

summation from n equals 1 to infinity of b_n = ∑n, have a product that converges, as their product ∑((1/n) * n) simplifies to a constant series ∑(1), which has a finite sum.

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a. The scale factor of the dilation is 2, since the length of each side of the dilated quadrilateral is twice the length of the original quadrilateral.

A quadrilateral is a polygon with four sides and four angles. It is a two-dimensional shape with an equal number of sides and angles, as well as four vertices and four interior angles. The most common examples of quadrilaterals include rectangles, squares, parallelograms, trapezoids, and rhombuses. All quadrilaterals have two pairs of parallel sides, and all four sides must be connected. Quadrilaterals can be classified based on their side lengths and the size of their angles.

b. The ratio of the length of AB to the length of A'B' is 2:1, since the length of AB is twice the length of A'B'.
c. The measures of angle A and angle A' are equal, since the dilation is centered on the origin and therefore the angles of the dilated quadrilateral are the same as the angles of the original quadrilateral.

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The answer of the given question based on the pyramid is , option (b) No, the rotation of the pyramid is forming circular bases in parallel planes.

A frustum is a three-dimensional geometric shape that is formed by slicing a cone (or pyramid) with a plane parallel to its base and removing the smaller, similar shape from the top. In other words, a frustum is the portion of a cone (or pyramid) that remains after its top part has been cut off by a plane parallel to its base.

The correct answer is (b) No, the rotation of the pyramid is forming circular bases in parallel planes.

When a pyramid is rotated around its center of rotation, it forms a three-dimensional solid with circular bases in parallel planes. This solid is known as a frustum or truncated pyramid. However, the frustum is not a spherical figure, as it does not have a round or curved surface like a sphere. Instead, it has flat, congruent faces in the shape of rectangles and trapezoids.

Option (c) is also incorrect as it describes a regular pyramid, which has congruent rectangular faces but does not involve rotation. Option (d) describes a sphere, which is not related to the rotation of a pyramid.

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Answer: Option (b) No, the rotation of the pyramid is producing circular bases on parallel planes. The offered question is based on a pyramid.

A pyramid is a 3D polyhedron having at least three triangle-shaped sides connecting above it and a foundation formed of polygons. Each of the three sides are often referred to as faces, and the point above the base has been referred to as the apex. A pyramid is created by connecting the base and apex. The triangular sides are often known as lateral faces to separate them from the base. The triangular face of a pyramid is formed by the connection of each base edge to the the top.

The correct response is (b) No, the pyramid's rotation is creating parallel circular bases.

A pyramid produces a three-dimensional solid with circular bases on parallel planes when it is rotated about its centre of rotation. The term "frustum" or "truncated pyramid" refers to this solid. The frustum does not, however, have a round or curved surface like a sphere, hence it is not a spherical figure. It has flat, symmetrical faces in the form of rectangles and trapezoids instead.

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Therefore , the solution of the given problem of equation comes out to be it can also be expressed as c = 1/4b, indicating that 1/4 cup of flour is used to make each order of brownies.

Variable words are commonly used in complex algorithms to show uniformity between two incompatible claims. Academic expressions called equations are used to show the equality of various academic numbers. Instead of an unique formula that splits 12 into two parts and can be used to analyze data received from y + 7, normalization in this case yields b + 7.

Here,

B. The connection between the independent factor (cups of flour) and the one that is dependent is modeled by the equation

=> b = 4c. (batches of brownies).

According to this calculation, 4 cups of flour are required to make one batch of brownies.

The equation can also be expressed as

=>  c = 1/4b, indicating that 1/4 cup of flour is used to make each order of brownies.

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As a result, the following is the system of equations' solution as  12x - 2y = 20 in the calculation, x = 7/4 and y = 1/2.

A mathematical assertion proving the equality of two expressions is known as an equation. It has two sides—a left side and a right side—that are divided by the equal symbol (=). Variables, constants, and mathematical processes may be used in the expressions on either side of the equal sign. For instance, the expression 2x + 3 on the left is equivalent to the expression 7 on the right, as shown by the equation 2x + 3 = 7.

given

We can use the technique of elimination to solve this system of equations by adding or removing one of the variables from the equations. In this instance, by combining the two equations, we can remove y:

12x - 2y = 20

16x + 2y = 29

28x = 49

We can now find the value of x by multiplying both parts by 28:

28x/28 = 49/28

x = 7/4

We can solve for y by substituting this value of x into either of the initial equations. Let's employ the initial equation:

12x - 2y = 20

12(7/4) - 2y = 20

21 - 2y = 20

-2y = -1

y = 1/2

As a result, the following is the system of equations' solution as  12x - 2y = 20 in the calculation, x = 7/4 and y = 1/2.

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Brenna is buying 15 tomato plants for her garden, because she uses a lot of cherry tomatoes when she cooks. The inequality models the this story is equals to c< 7. So, correct option is option (b). The graph for inequlity to model the story is present in above figure.

Inequality refers a relationship between two values that are not equal, i.e., a<b. We have, brenna bought 15 tomato plants for her garden. At a time of cooking , she used a lot of cherry tomatoes. So, she wants a variety of tomato plants. She has decided to buy fewer than 7 cherry tomato plants for garden. Let c be the number of cherry tomato plants bought by brenna. Now, as we know cherry tomato plants come into the tomato plants, so c< 15 . Also, she plans to buy cherry plants less than 7, so c < 7. That is we have to choices for inequlity, c < 15 or c< 7. But we know if a number is less than 7 then trivially, it is less than 15 ( 7< 15), so we use the c< 7, Inequality to model the story. The graph of this inequlity that models the story is present above in figure. Hence, required inequalty is c< 7.

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Complete question:

Brenna is buying 15 tomato plants for her garden. she uses a lot of cherry tomatoes when she cooks, but she wants a variety of tomato plants. brenna plans to buy fewer than 7 cherry tomato plants. let c represent the number of cherry tomato plants brenna might buy. which inequality models the story?

a) c> 7

b) c< 7

c) c>15

d) c<15

See the above Graph and find out the inequality that models the story. To draw a ray, plot an endpoint and select an arrow. Select an endpoint to change it from closed to open. Select the middle of the ray to delete it.

The statement "Hazardous chemicals are only found in industrial settings, so school employees do have responsibilities regarding them" is False.

What are hazardous chemicals?

Hazardous chemicals are substances that can cause harm to living beings when exposed to them. They are also known as hazardous substances, and they are found in various forms such as solids, liquids, gases, and dust. Hazardous chemicals pose a significant danger to human health and the environment, and they are found in both industrial and non-industrial settings.

What is the role of school employees regarding hazardous chemicals?

School employees have a responsibility to ensure that students and staff are safe from hazardous chemicals.

School laboratories and art rooms are examples of locations where hazardous chemicals may be found.

School employees must ensure that hazardous chemicals are properly labeled and stored, and they must provide safety training and equipment to students and staff who work with hazardous chemicals.

Therefore, it is not true that school employees do not have any responsibilities regarding hazardous chemicals, even though they are not found exclusively in industrial settings.

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There is no angle (0) in degrees that answers the preceding equation since cos(0) = 3/2 is illogical.

To determine the angles of a right triangle, trigonometric ratios are ratios of the side lengths of the triangle. Sine (sin), cosine (cos), and tangent (tan) are the three fundamental trigonometric ratios, and their definitions are as follows:

Sine: The length of the angle's opposite side divided by the length of the hypotenuse is known as the sine of the angle.

Cosine: The length of the neighbouring side divided by the length of the hypotenuse is the angle's cosine value.

Angle's tangent is determined by dividing the length of the adjacent side by the length of the opposite side.

These ratios can be used to discover missing side lengths in right triangles and other situations with right triangles.

given

The number one is the value of cos(0).

There is no angle (0) in degrees that answers the preceding equation since cos(0) = 3/2 is illogical.

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Answer:

We can convert the dimensions of the cubic block from meters to decimeters, since there are 10 decimeters in a meter.

0.255 meters = 2.55 decimeters

The volume of a cube is given by the formula:

Volume = (side length)^3

Plugging in the given value of 2.55 decimeters, we get:

Volume = (2.55 dm)^3

Volume = 16.419375 dm^3

Therefore, the volume of the cubic block in cubic decimeters is approximately 16.42 dm^3.

The volume of this block in cubic decimeters is 0.255 meters on a side is 0.000251485 dm³

The volume of the cubic block of concrete can be found by calculating the volume of a cube. The formula for the volume of a cube is V = s^3, where s is the length of the side of the cube.

The side of the cube is 0.255 meters, so the volume is calculated by cubing 0.255.

The volume of the block is 0.0251485m^3.

1m^3 = 1000dm^3.
So, the volume of the block in cubic decimeters is 0.000251485dm^3.

To summarize, the volume of a cubic block of concrete that is 0.255 meters on a side is 0.000251485 dm³.

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Answer

bring down 6

why?

bring down 6 to show there are 2 tens and 6 ones that still need to be divided

We must prioritize biblical teachings and values over the cultural trends of the day. We should be salt and light to the world and live our lives in a way that honours God.

As Christians, it is our responsibility to be salt and light to the world. The dominant culture may be a reflection of the majority of the population's thoughts, but it may not necessarily align with the Bible's teachings. We should not be swayed by the current trends and instead prioritize God's standards.

The counterculture of the 1960s, according to some, promoted ideas that are contrary to Christian teachings. Many people who were part of this movement advocated for sexual freedom, drug use, and rebellion against authority. Christians should not have supported these behaviours or beliefs since they are inconsistent with biblical principles.

Likewise, in today's world, there are areas in which Christians must not conform to the dominant culture. One of the primary areas where Christians may be tempted to conform is in terms of sexual morality. Many people believe that premarital sex and homosexuality are acceptable practices, but these beliefs are not supported by the Bible.

As a result, Christians should not follow these cultural trends, but rather stick to biblical teachings and live their lives according to God's standards.Another example is in regards to materialism. The desire to accumulate wealth and material possessions is prevalent in modern culture.

Still, Christians must resist the temptation to make money and possessions their god, as this is against the Bible's teachings. Instead, we should focus on using our resources to glorify God and help others.In conclusion, Christians must be cautious about conforming to the dominant culture.

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The distance from each landing point to the boat pulled ashore at point C is given by:-d = sqrt(25^2 (y^2/x^2 + 1))

WHAT IS TRIGONOMETRY ?

Trigonometry is a branch of mathematics that deals with the study of the relationships between the sides and angles of triangles. It is used to solve problems involving distances, heights, angles, and other geometric measurements. Trigonometric functions such as sine, cosine, and tangent are used to relate the angles of a triangle to its sides. Trigonometry has many practical applications in fields such as engineering, physics, and architecture, and is essential for understanding and solving problems involving waves, oscillations, and periodic phenomena. It is also used in navigation, surveying, and astronomy, among other areas.

To solve this problem, we need to use the concept of right triangle trigonometry.

Let's assume that point C is directly opposite the midpoint of AB, and that the distance from point C to the midpoint of AB is x. Then we can draw a right triangle with legs of length x and 25 (half of 50) and a hypotenuse of length d (the distance from point C to each landing point).

Using the Pythagorean theorem, we can write:

d^2 = x^2 + 25^2

We also know that the angles opposite the legs of the right triangle are complementary, so we can use the tangent function to write:

tan(theta) = x/25

where theta is the angle between the hypotenuse and the side of length 25.

We can rearrange this equation to solve for x:

x = 25 tan(theta)

Now we can substitute this expression for x into the equation for d^2:

d^2 = (25 tan(theta))^2 + 25^2

Simplifying this equation, we get:

d^2 = 25^2 (tan^2(theta) + 1)

Finally, we can use the fact that tan(theta) is equal to the height of the opposite bank divided by the distance from point C to the midpoint of AB. Let's call this distance y. Then we have:

tan(theta) = y/x

Substituting this expression for tan(theta) into the equation for d^2, we get:

d^2 = 25^2 (y^2/x^2 + 1)

So the distance from each landing point to the boat pulled ashore at point C is given by:

d = sqrt(25^2 (y^2/x^2 + 1))

where x and y are the distances from point C to the midpoint of AB and the opposite bank, respectively.

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Therefore, the number of ways to choose a committee of size 10 with at least 2 men is: 961379655

We are to find the number of ways to choose a committee of size 10 with at least 2 men if there are 30 women in the club and 20 men in the club using set difference. We can use the following formulas: (1) A set difference B = {elements of A that are not in B} (2) The number of ways to choose k elements from n elements is represented by nCk.

(3) The complement of an event E is the set of all outcomes in the sample space that are not included in the outcome of E.(4) If E is an event, then P(E) represents the probability of E happening.(5) P(E') + P(E) = 1 (where E' is the complement of E).

To choose a committee of size 10 with at least 2 men, we can first find the total number of committees possible (which includes committees with 0, 1 or 2 men) and then subtract the committees that do not have at least 2 men. So, the total number of ways to choose a committee of size 10 is 50C10. Using the formula nCk = n!/k!(n-k)!, we can write it as follows: 50C10 = 50! / 10!40! = 10272278170.

The number of ways to choose a committee of size 10 with no men is 30C10.Using the formula nCk = n!/k!(n-k)!, we can write it as follows:30C10 = 30! / 10!20! = 30045015. The number of ways to choose a committee of size 10 with exactly 1 man is (20C1) * (30C9).Using the formula nCk = n!/k!(n-k)!, we can write it as follows:(20C1) * (30C9) = 20! / 1!19! * 30! / 9!21! = 47152200.

The number of ways to choose a committee of size 10 with exactly 2 men is (20C2) * (30C8). Using the formula nCk = n!/k!(n-k)!, we can write it as follows:(20C2) * (30C8) = 20! / 2!18! * 30! / 8!22! = 47502000. Therefore, the number of ways to choose a committee of size 10 with at least 2 men is:50C10 - 30C10 - (20C1) * (30C9) - (20C2) * (30C8)10272278170 - 30045015 - 47152200 - 47502000 = 961379655  Ways.

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According to the given information, the two equations that are true for  x=-2  and  x=2  are  4x²-16=0  and  2(x-2)²=0.

What is an equation?

An equation is a mathematical statement that shows that two expressions are equal. It consists of two sides separated by an equals sign (=). The expressions on both sides of the equation can contain numbers, variables, and mathematical operations such as addition, subtraction, multiplication, and division.

The values of  x=-2  and  x=2  satisfy the equation  4x²=16, so  4x²-16=0  is true for both  x=-2  and  x=2.

The equation  x²=-4  has no real solutions, so it is not true for either  x=-2  or  x=2.

The equation  3x²+12=0  is not true for either  x=-2  or  x=2 , because  3x²+12  is always positive for any real value of  x .

The equation  2(x-2)²=0  is only true for  x=2 , because plugging in  x=-2  gives  2(-4)² =32 ≠0.

Therefore, the two equations that are true for  x=-2  and  x=2  are  4x²-16=0  and  2(x-2)²=0 .

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Answer:

Step-by-step explanation:

asdf

Answer:

Step-by-step explanation:

You want the remainder of a number when divided by 3 if (1) the sum of digits is 5, and (2) the remainder from division by 9 is 5.

The sum of digits of a 2-digit number will be 5 if that number is one of ...

  {14, 23, 32, 41, 50}

In every case, the remainder when divided by 3 is 2. Effectively, it is the remainder of 5 when that is divided by 2.

In addition to the numbers listed above, 2-digit numbers with a sum of digits of 14 will also have a remainder of 5 when divided by 9. This adds five more numbers to the list:

  {59, 68, 77, 86, 95} . . . . have remainders of 5 when divided by 9

The remainders when divided by 3 are all 2 for these numbers as well.

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Additional comment

The process of (recursively) summing the digits of a positive integer is called "casting out 9s". It effectively finds the modulo 9 value of the number, with the exception that a sum of 9 corresponds to a modulo 9 value of 0.

Since 9 is divisible by 3, the modulo 3 value of a number will be the modulo 3 value of the modulo 9 value. In other words, if the sum of digits is 5, or the remainder from division by 9 is 5, then the mod 3 value is 5 mod 3 = 2.

a. The probability that all four units are good is 0.2067 (approx),

b. The probability that exactly two units are good is 0.0226 (approx).

Given a shipment of 13 microwave ovens contains four defective units and a vending company purchases four units at random, we need to calculate the probability of the following events:

(a) all four units are good.

(b) exactly two units are good.

(a) What is the probability that all four units are good?

To solve this, we need to use the formula for the probability of an intersection of independent events.

Since the probability of getting a good unit is 9/13, then the probability of getting 4 good units in a row is calculated as follows:

P(All 4 units are good) = P(Good unit) × P(Good unit) × P(Good unit) × P(Good unit) = 9/13 × 9/13 × 9/13 × 9/13 = 47829609/232044048 = 0.2067 (approx)

(b) What is the probability that exactly two units are good?

Here, we need to use the binomial probability formula since the number of good units follows a binomial distribution. We need to find the probability of getting exactly 2 good units, given that we are purchasing 4 units.

P(exactly 2 units are good) = C(4,2) × P(Good unit)² × P(Defective unit)²

= 6 × (9/13)² × (4/13)²

= 52488/2320440

= 0.0226 (approx)

For similar question probability.

https://brainly.com/question/25428940

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Answer:

Step-by-step explanation:

To find the difference between the temperatures, we need to subtract the night temperature from the day temperature.

Difference = Day temperature - Night temperature

Difference = 36.6°F - (-18.6°F) (Note: Subtracting a negative number is the same as adding the positive number)

Difference = 36.6°F + 18.6°F

Difference = 55.2°F

Therefore, the difference in temperature between day and night in the town is 55.2°F.