help me pleaseee ejejie​

Answer:

-4 is the correct answer

Answer:

y=18

Step-by-step explanation:

equation:y=3x -7

x=7 then y =?

substitute the vale of x in the equation

y=3x-7

y=3*7-7

y=21-7

y=18

therefore the value of y corresponds to 7 is 18.

Step-by-step explanation:

(6x+3)x(2x-3)

6x x 2x=12x^2

3 x -3=-9

12x^2-9

Idk if you need to simplify more but I hope it helps!

Correlational statistics quantify the strength of a relationship between variables but do not provide information about causality because they cannot assess the temporal sequence of variables.

Correlational statistics, such as correlation coefficients, measure the degree of association between variables.

They indicate the strength and direction of the relationship but do not establish a cause-and-effect relationship. This limitation arises because correlational analysis does not allow for determining the temporal sequence of variables, which refers to the order in which the variables occur or change.

Without knowledge of the temporal sequence, we cannot ascertain whether one variable causes the other or if they are both influenced by an external factor. To establish causality, additional research methods such as experimental designs or longitudinal studies are necessary, where variables can be manipulated or observed over time, respectively.

Thus, correlational statistics serve as valuable tools for understanding associations but do not provide insights into causation.

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No, nominal data is not rank ordered.

Nominal data, also known as categorical data, is a type of data that is used to label and classify groups of items based on characteristics and attributes.

It does not involve any measurement or numerical value and typically does not follow any order.

Nominal data is not measured in any way, so it does not have a ranking system.

In contrast, data that is rank-ordered, such as ordinal data, is measured and can be ranked from lowest to highest.

If you had a list of test scores from a group of students, the scores would be rank-ordered from lowest to highest.  

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An inequality that expresses the interval of values that n may have is 7 < n < 17.

In Euclidean geometry, the Triangle Inequality Theorem states that the sum of any two sides of a triangle must be greater than or equal (≥) to the third side of the triangle.

Mathematically, the Triangle Inequality Theorem is represented by this mathematical expression:

b - c < n < b + c

Where:

n, b, and c represent the side lengths of this triangle.

By applying the Triangle Inequality Theorem, the possible side lengths of the triangle's third side is given by:

b - c < n < b + c

12 - 5 < n < 12 + 5

7 < n < 17.

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The image of point R(-11, 1) under the given transformation is R'' = (3, 9).

Coordinate geometry is a branch of mathematics that deals with the study of geometric shapes using the Cartesian coordinate system.

To find the image of point R under the given transformation, we can use the following steps:

Apply the translation that centers the trapezoid at (-13, -5) by subtracting (-13) from the x-coordinates and subtracting (-5) from the y-coordinates of all the vertices:

R' = (-11 - (-13), 1 - (-5)) = (2, 6)

Apply the scaling with factor k = 3/2 by multiplying the x and y coordinates by 3/2:

R'' = (3/2 * 2, 3/2 * 6) = (3, 9)

Hence, the image of point R(-11, 1) under the given transformation is R'' = (3, 9).

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The operation that Amjed should perform to determine the relative frequency of a person over 30 years old who prefers to ride a mountain bike is given as follows:

2) Divide 25 by 462.

The parameters that are needed to calculate a probability are listed as follows:

Then the probability is calculated as the division of the number of desired outcomes by the number of total outcomes, hence it is the same as a relative frequency.

The total number of people is given as follows:

58 + 164 + 215 + 25 = 462.

Out of these people, 25 prefer mountain bike, hence the relative frequency is given as follows:

25/462.

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the area of the equilateral triangle with a side length of 15 is approximately 97.4279 square units.

A regular triangle is also known as an equilateral triangle, which means all of its sides are equal in length. To find the area of an equilateral triangle with a side length of 15, we can use the following formula:

Area = (√(3) / 4) × side²

where "side" is the length of one side of the triangle.

Let's plug in the given value of side length, which is 15, into the formula:

Area = (√(3) / 4) × 15²

Area = (√(3) / 4) × 225

Area = 97.4279 (rounded to 4 decimal places)

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Answer: A,B

Step-by-step explanation: the numbers constantly add up only by 218 or 1240 , C and D would not be correct because the rate of change increases as will with the total sum after each period of time

also tiny hint, if you were to draw an X,Y axis graph, A and B would be a straight line while C and D are curved up-wards

Answer:

O I, II & III

Step-by-step explanation:

(2, 3) and (1, 1)

m = (3 - 1)/(2 - 1) = 2

y = 2x + b

1 = 2(1) + b

b = -1

The equation of the line is

y = 2x - 1

I) y = 2(x - 2) + 3 = 2x - 4 + 3 = 2x - 1   Yes

II) y = 2x - 1   Yes

III) y = 2(x - 1) + 1 = 2x - 2 + 1 = 2x - 1   Yes

Answer: O I, II & III

The probability of Jack picking a yellow or white sock is 0.6 (60%).

The probability of Jack picking a blue sock is 4/14 (28.6%)

The probability of Jack picking a red sock is 3/14 (21.4%)

The probability of Jack picking a white sock is 2/14 (14.3%)

The probability of Jack picking a yellow sock is 1/14 (7.1%)

Therefore, the probability of Jack picking a yellow or white sock is 0.6 (60%)

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Step-by-step explanation:

numbers that can not be written as a fraction

The hiker's distance and bearing from their starting point are approximately 7.155 miles and 28.07°, respectively.

Given that two hikers travel 8 mi southeast and then 6 mi east, we are to find the hikers distance and bearing from their starting point at this time.Long ExplanationThe bearing of the hiker refers to the angle between the hiker's direction and North. So, let us assume that the hiker has initially moved at a direction East, as shown below:We are given that the hiker has traveled 8 miles to the southeast.

Therefore, from the diagram, the distance traveled in the East direction is 8 sin(45) miles, and the distance traveled in the South direction is 8 cos(45) miles. East = 8 sin(45) = 8/√2 = 4√2 miles South = 8 cos(45) = 8/√2 = 4√2 miles We are then told that the hiker travels 6 miles east, from the last position.

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Based on the given information and performing a one-sample t-test, the conclusion is that if the population mean (μ) is greater than 30.8294 km per litre, we reject the null hypothesis.

Given:

Sample mean (x') = 30 km per litre

Sample standard deviation (s) = 3.5 km per litre

Sample size (n) = 50

Significance level (α) = 0.05 (5%)

Null hypothesis \((H_0)\): The mean petrol consumption of the new car is equal to or higher than that of the existing car.

Alternative hypothesis \((H_1)\): The mean petrol consumption of the new car is lower than that of the existing car.

We'll calculate the test statistic (t-value) and compare it with the critical t-value.

The formula for the t-value is:

t = (x' - μ) / (s / √n)

where μ is the population mean (mean petrol consumption of the existing car).

First, we need to calculate the critical t-value from the t-distribution table. Since we have a significance level of 0.05 and (50 - 1) degrees of freedom, the critical t-value for a one-tailed test is approximately -1.677.

Now, let's calculate the t-value:

t = (30 - μ) / (3.5 / √50)

To reject the null hypothesis, the t-value should be less than the critical t-value.

Simplifying the equation:

t = (30 - μ) / (0.495)

To find the critical value, we compare it with the calculated t-value:

-1.677 > (30 - μ) / (0.495)

Multiplying both sides of the inequality by 0.495:

-0.8294 > 30 - μ

Rearranging the inequality:

μ > 30 + 0.8294

μ > 30.8294

Therefore, if the population mean (μ) is greater than 30.8294 km per litre, we reject the null hypothesis in favor of the alternative hypothesis, concluding that the mean petrol consumption of the new car is lower than that of the existing car.

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Answer:

soooo u do dis and dat and OPE lookit the time

Dum Step-by-step explanation:

looks like its time to act dum ayy friend me. im givin out free points every weekday. if its friday, i do it every hour, called free point friday. check me out.

Answer:

  15.30

Step-by-step explanation:

You want f(2) if f(x) is an exponential function such that f(-3) = 9 and f(7) = 26.

Using the given points, we can write the function as ...

  \(f(x)=9\left(\dfrac{26}{9}\right)^{\dfrac{x-(-3)}{7-(-3)}}=9\left(\dfrac{26}{9}\right)^{\dfrac{x+3}{10}}\)

Then the value of f(2) is ...

  \(f(2)=9\left(\dfrac{26}{9}\right)^{\dfrac{2+3}{10}}=9\sqrt{\dfrac{26}{9}}=3\sqrt{26}\approx 15.29706\\\\\boxed{f(2)\approx15.30}\)

__

Additional comment

The form of the function is ...

  f(x) = a·b^((x-x₀)/i)

where a=value at the beginning of the interval, b is the ratio of ending to beginning values, and i=interval width: x₁ -x₀. This can be written as an exponential function of e, but this is the simplest way to use given values.

Here, the "interval" is -3 to +7, and the corresponding beginning and ending values are 9 and 26, respectively.

Answer:

step number 1 is incorrect.

Step-by-step explanation:

Here is the solution of this equation [2x-31-1=2].

2x-31-1=2

or 2x-31=2+1

or 2x=2+1+31

or 2x= 34

or x=34/2

or x= 17

the answer of this equation is X=17.

Answer:

Step 1

Step-by-step explanation:

Answer:

\(x = 11\)

Step-by-step explanation:

Given

The attached triangle

Required

Find x

The theorem that applies to this question is the theorem of external angles. And it translates to:

\(11x +2 = 58 + 5x + 10\)

Collect Like Terms

\(11x -5x = 58 + 10-2\)

\(11x -5x = 66\)

\(6x = 66\)

Divide through by 6

\(\frac{6x}{6} = \frac{66}{6}\)

\(x = \frac{66}{6}\)

\(x = 11\)

The Linnaean class system provides a framework for understanding the diversity of life on Earth by grouping similar organisms together based on shared characteristics.

By comparing and contrasting the definitions of each class, we can see how different groups of animals are related to each other and how they differ in terms of their biological traits.

The Linnaean class system is a way of organizing living things based on shared characteristics. Let's compare and contrast the definitions of the Linnaean classes using a Venn diagram.

First, we have the class Mammalia, which includes all animals that have hair or fur, produce milk to feed their young, and have specialized teeth. This class overlaps with the class Aves, which includes all birds, because some birds have specialized beaks and feathers that are similar to mammalian hair and teeth. However, birds do not produce milk.

Next, we have the class Reptilia, which includes animals that are cold-blooded, lay eggs, and have scales or plates on their skin. This class overlaps with both Mammalia and Aves in terms of species that lay eggs, such as monotremes (platypus and echidnas) and some birds (ostriches and emus). However, reptiles lack specialized teeth and do not produce milk.

Finally, we have the class Amphibia, which includes animals that are cold-blooded, breathe through their skin, and undergo metamorphosis from a water-dwelling larval stage to a land-dwelling adult stage. This class overlaps with Reptilia in terms of some shared characteristics, but Amphibia also lacks specialized teeth and does not lay eggs with hard shells like reptiles.

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it is proven that there are no integers x, y, z such that x² + y² = 8z + 3.

What is Integers?

A whole number is a number that can be written without a fractional component. For example, 21, 4, 0, and −2048 are integers, while 9.75, 5+, and √2 are not. The set of integers consists of zero, positive natural numbers, also called integers or counting numbers, and their additive inverses.

To prove that there are no integers x, y, z such that x² + y² = 8z + 3, we can use the concept of modulo arithmetic.

First, let's consider the possible values of x² and y² modulo 8:

For any integer n, n² modulo 8 can only be 0, 1, or 4.

Now, let's examine the possible values of 8z + 3 modulo 8:

8z modulo 8 is always 0.

3 modulo 8 is equal to 3.

Therefore, the possible values of x² + y² modulo 8 can only be 0, 1, or 4, while 8z + 3 modulo 8 is equal to 3. Since 0, 1, and 4 are not equal to 3 modulo 8, there are no integers x, y, z that satisfy the equation x² + y² = 8z + 3.

Hence, it is proven that there are no integers x, y, z such that x² + y² = 8z + 3.

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a) The t critical values are -1.708 and  1.708

b) The t critical values are -1.782 and  1.782

What is t-statistic ?

The t-statistic in statistics measures how far an estimated value of a parameter deviates from its hypothesised value in relation to its standard error.

T symbol in statistics mean Test statistic for t-test ( t-score )

a) At α = 0.10,  df=14+13-2 = 25( two tailed)

t critical values are -1.708 and  1.708

b) At α = 0.10,  

df= smaller(n1-1, n2-1)= smaller(14-1, 13-1)= smaller(13, 12) = 12

t critical values are -1.782 and  1.782

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The answer should be 18cm

Here is why I think that:

On the ruler, you should count from 9 to 26

9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26.

1,  2,   3,  4,   5,  6,   7,   8,   9, 10, 11, 12,  13,  14, 15, 16,  17,   18.

The total tick marks from 9 to 26 is = to 18

(I know that R is resting above the number eight, do not count that one, many people make that mistake)

Please let me know in the comments if

somehow my calculation is wrong.

Answer:Use the slope-intercept form to find the slope.

m=4

The equation of a perpendicular line to

y

=

4

x

−

9

must have a slope that is the negative reciprocal of the original slope.

m

perpendicular

=

-1/4

Step-by-step explanation:

hii lily how are u

Answer:

y = -x + 3

Step-by-step explanation:

The line is going down so the slope will be NEGATIVE

The line starts at (0, 3) which means the y-intercept is 3

The slope is -1 or -x

Using it's concept, the probabilities are given as follows:

A. 1/4.

B. 11/16.

C. 0.

A probability is given by the number of desired outcomes divided by the number of total outcomes.

In this problem, the number of marbles is given by:

7 + 5 + 4 = 16.

Then:

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The output when the given pseudocode is executed with A = 5 and B = 3 will be "25, 16, 9, 4, 1".

The given pseudocode includes a loop that iterates as long as A is greater than or equal to B. In each iteration, the square of A is displayed, and A is decremented by 1. We are asked to determine the output when A is initially 5 and B is 3.

Step 1: Initialization

A is set to 5 and B is set to 3.

Step 2: Iteration 1

Since A (5) is greater than or equal to B (3), the loop executes.

The square of A (5²) is displayed, resulting in the output "25".

A is decremented by 1, so A becomes 4.

Step 3: Iteration 2

A (4) is still greater than or equal to B (3).

The square of A (4²) is displayed, resulting in the output "16".

A is decremented by 1, so A becomes 3.

Step 4: Iteration 3

A (3) is still greater than or equal to B (3).

The square of A (3²) is displayed, resulting in the output "9".

A is decremented by 1, so A becomes 2.

Step 5: Iteration 4

A (2) is still greater than or equal to B (3).

The square of A (2²) is displayed, resulting in the output "4".

A is decremented by 1, so A becomes 1.

Step 6: Iteration 5

A (1) is still greater than or equal to B (3).

The square of A (1²) is displayed, resulting in the output "1".

A is decremented by 1, so A becomes 0.

Step 7: Loop termination

Since A (0) is no longer greater than or equal to B (3), the loop terminates.

Therefore, The output generated by the code execution will be "25, 16, 9, 4, 1" as the squares of A (starting from 5 and decreasing by 1) are displayed in each iteration of the loop.

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Answer:

B

Step-by-step explanation:

5*8 equals 40, the area of the square. Divide by 2 to get the triangles area. which is 20

Answer:

B is correct

Step-by-step explanation:

8*5=40

40*1/2=20

B is correct

Answer:

40 seconds

Step-by-step explanation:

Ratio of 15:30 = 1:2

             20:x

x = 20 x 2 using ratio, also stop putting these Maths challenge qs on website.

x = 40 :)

Engineers can be held most morally blameworthy for foreseeable harms resulting from technological innovations, engineers have a responsibility to anticipate the potential consequences of their work,

and to take steps to mitigate those consequences. If they fail to do so, and their work results in harm, they can be held morally blameworthy. When engineers develop new technologies, they have a responsibility to consider the potential consequences of their work.

They need to think about how their technology could be used, and whether it could be used to harm people or the environment.

They also need to consider how their technology could be misused, and what steps they can take to prevent misuse.

If engineers fail to consider the potential consequences of their work, and their work results in harm, they can be held morally blameworthy. This is because they have a duty to protect the public from harm, and they have failed to fulfill that duty.

For example, engineers who develop new weapons systems have a responsibility to consider the potential consequences of their work. They need to think about how their weapons could be used,

and whether they could be used to kill or injure innocent people. They also need to consider how their weapons could be misused, and what steps they can take to prevent misuse.

If engineers fail to consider the potential consequences of their work, and their weapons are used to kill or injure innocent people, they can be held morally blameworthy. This is because they have a duty to protect the public from harm, and they have failed to fulfill that duty.

It is important to note that engineers cannot be held morally blameworthy for unforeseeable harms. This is because they did not have the opportunity to anticipate the harm, and they could not have taken steps to prevent it.

For example, engineers who develop new medical treatments cannot be held morally blameworthy if the treatments have unforeseen side effects. This is because the engineers did not have the opportunity to anticipate the side effects, and they could not have taken steps to prevent them.

In conclusion, engineers can be held morally blameworthy for foreseeable harms resulting from technological innovations.

This is because they have a responsibility to anticipate the potential consequences of their work, and to take steps to mitigate those consequences.

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The variable that is used to predict the volume of timber in this tree using a simple linear regression model is Diameter .

In the question ,

a scatter plot is given ,

the scatter plot shows the relationship between height , diameter and the volume .

and diameter of tree is measured 4.5 feet above the ground .

it is given that suppose , we have height and diameter measurements for another black cherry tree ,

we have to find the variable that help in predicting the volume of the timber .

So , from the scatter plot given below ,

we can say that , the relationship between diameter and volume of these trees is strong  than height .

So , diameter is used to predict the volume of timber in this tree using a linear regression model.

Therefore , the variable that help in predicting the volume of the timber is Diameter .

The given question is incomplete , the complete question is

The scatterplots below show the relationship between height, diameter, and volume of timber in 31 felled black cherry trees. The diameter of the tree is measured 4.5 feet above the ground .

Suppose you have height and diameter measurements for another black cherry tree. Which of these variables would be preferable to use to predict the volume of timber in this tree using a simple linear regression model ? Explain your reasoning.

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