select the best definition of random variation. multiple choice question. unusual variation that occasionally occurs in a process. variation that can happen any day, any time. common variation inherent in a process occurring by chance.

The values of the two numbers of the system of equations is x = 6 and y = -9.

First, we are told that "three times the sum of two numbers is 15". This can be written as:

3(x + y) = 15

Next, we are given that "one of the numbers is 9 more than one-third of the other number". We can break this down into two parts:

"one of the numbers": this refers to either x or y, but we don't know which one yet. Let's assume that it refers to x.

"9 more than one-third of the other number": this means that we take one-third of the other number (y), add 9, and that gives us x. In equation form, this is:

x = (1/3)y + 9

Now we have two equations with two variables:

3(x + y) = 15

x = (1/3)y + 9

We can use these equations to solve for x and y. There are different methods for solving a system of equations, but one common method is substitution.

Using the second equation, we can solve for x in terms of y:

x = (1/3)y + 9

3x = y + 27

y = 3x - 27

Now we can substitute this expression for y into the first equation:

3(x + y) = 15

3(x + 3x - 27) = 15

Simplifying this equation gives:

12x = 72

x = 6

Finally, we can use the equation we found for y in terms of x to find the value of y:

y = 3x - 27

y = 3(6) - 27

y = -9

So the two numbers are x = 6 and y = -9.

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By considering the absolute values of the integers, 4, 3,07, and 2.971 may be derived as a simpler set of positive numbers for the equations.

The distance a number is from zero on the number line is its absolute value. Taking a number's absolute value allows you to convert it into a positive number because it is by definition always positive. Just disregarding the sign and focusing on the size of a number allows us to determine its absolute value. This rule may be applied to each of the supplied integers in this situation, giving rise to their absolute values, which are all positive. The set of real numbers that are greater than zero in mathematics is known as the set of positive real numbers, or displaystyle'mathbb 'R' '>0'='left'x'in'mathbb 'R"mid x>0'right'.

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No triangles: angle 30°,85°,60° and sides 2,8,10

One triangle: sides 7,24,25

many triangles: angle 5°,15°,160° and angle 45°, 45°, 90°

A triangle is a geometric shape that is formed by connecting three points in a plane with straight lines. It has three sides, three angles, and three vertices (or corners). The sum of the angles in a triangle is always 180 degrees. Triangles are classified based on the lengths of their sides and the measures of their angles.

Sum of angles should not be equal to 180°

Sum of two sides of triangle is not always greater than third side.

30°+85°+60°=175°<180°

Hence, this angle do not form triangle

2+8=10

Hence, this sides do not form triangles.

Sum of two sides of triangle is always greater than third side.

7+24>25

Hence, this sides do not form triangles.

Sum of angles should be equal to 180°

5°+15°+160°=180°

Hence, this angle  form triangle

45°+45°+90°=180°

Hence, this angle  form triangle.

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The complete question is:

Image is attached below.

Out of a random sample of 1,000 Dutchmen, we would expect around 63 to be taller than 188 cm. This can be determined by using the standard normal distribution and probability, expecting the 159 Dutchmen to be taller than 188 cm

The standard normal distribution is a normal distribution with a mean of 0 and a standard deviation of 1. A normal distribution is a bell-shaped curve that is symmetrical around the mean. A normal distribution is used to model various natural phenomena.

Probability is the likelihood or chance of an event occurring. Probability is usually expressed as a fraction, decimal, or percentage. Probability is used in many fields such as mathematics, physics, statistics, and finance.

The given problem can be solved by converting 188 cm to a z-score and then finding the probability using a standard normal distribution table.

The z-score formula is given by:

z = (x - μ) / σwhere x = 188, μ = the mean height of Dutch men, and σ = the standard deviation of height for Dutchmen.

Let's assume that the mean height of Dutchmen is 180 cm and the standard deviation is 8 cm.

z = (188 - 180) / 8

z = 1

Therefore, the z-score for a height of 188 cm is 1.

Using a standard normal distribution table, we can find the probability of a man being taller than 188 cm as approximately 0.1587.

Therefore, in a random sample of 1,000 Dutchmen, we would expect approximately 0.1587 x 1,000 = 158.7 men to be taller than 188 cm. Rounded to the nearest integer, we would expect 159 Dutchmen to be taller than 188 cm.

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Answer:

a. After 10 minutes of hiking, Kiran will have covered a distance of:

distance = rate × time

distance = 0.04 mile/min × 10 min

distance = 0.4 mile

So, his remaining distance on the trail will be:

remaining distance = total distance - covered distance

remaining distance = 1.8 mile - 0.4 mile

remaining distance = 1.4 miles

Therefore, Kiran's remaining distance on the trail after 10 minutes of hiking is 1.4 miles.

b. We can use the same formula to find out how far Kiran will have walked after a certain amount of time:

distance = rate × time

We know that Kiran walks at a rate of 0.04 mile a minute, and we want to find out how much time it will take him to cover the remaining distance of 0.2 mile. So we can rearrange the formula to solve for time:

time = distance / rate

time = 0.2 mile / 0.04 mile/min

time = 5 minutes

Therefore, Kiran will have 0.2 mile left on the trail after 5 minutes of walking.

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Answer:

  about 0.40

Step-by-step explanation:

You have ...

and you want to know the probability a turbine is faulty if it fails the test.

The probability a turbine will fail the test is the sum of the probabilities a good turbine will fail, and that a bad turbine will fail.

  p(good & fail) = p(good)×p(good fails) = 0.98×(1 -0.97) = 0.0294

  p(bad & fail) = p(bad fails)×p(bad) = (1 -0.01)×(1 -0.98) = 0.0198

Then the probability a tested turbine will fail is ...

  p(fail) = p(good & fail) +p(bad & fail) = 0.0294 +0.0198 = 0.0492

The probability that a turbine is faulty given that it failed the test is ...

  p(bad | failed) = p(bad & fail)/p(fail) = 0.0198/0.0492 ≈ 0.4024

The probability a turbine is faulty if it fails the test is about 0.40.

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The least upper bound of the elements {8, 12} under the divisibility relation on the set {1, 2, 3, 6, 8, 12, 24, 36} is 24.

To find the least upper bound of a set of elements under a relation, we look for the smallest element in the set that is greater than or equal to all of the elements in the set.

Under the divisibility relation, an element a is said to be divisible by an element b (written as b divides a) if a is a multiple of b, that is, a = b * k for some integer k. For example, 8 divides 24 because 24 = 8 * 3.

We want to find the least upper bound of the elements {8, 12} under this relation on the set {1, 2, 3, 6, 8, 12, 24, 36}. That means we want to find the smallest element in the set that is a multiple of both 8 and 12.

We can list the multiples of 8 and 12 in the set as follows:

Multiples of 8: 8, 24

Multiples of 12: 12, 24, 36

We can see that the smallest element in the set that is a multiple of both 8 and 12 is 24.

Therefore, the least upper bound under the divisibility relation on the set {1, 2, 3, 6, 8, 12, 24, 36} is 24.

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The answer on the number line is 1) √2,√3,√4,√5,√6,√7,√8,√9,√10 . 2). A. √62 (between 7 and 8 on the number line),B. √84 (between 9 and 10 on the number line),C.

In mathematics, perfect square is integer that is square of an integer. In other words, perfect square is  non-negative integer that can be expressed as  product of some integer multiplied by itself.

1). The first perfect square is 1, so it is already placed on the number line. The other perfect squares are:

4,9,16,25,36,49 64,81,100

You can place each of these numbers on the number line above the corresponding tick mark.

2). Place the following letters on their approximate place on the number line above.

To place each letter on the number line, you need to estimate its value based on its square root. For example, the square root of 62 is between the square roots of 49 and 64, so you can place letter A between those two numbers on the number line.

Here are the estimated values and approximate placements for each letter:

A. √62 (between 7 and 8 on the number line)

B. √84 (between 9 and 10 on the number line)

C. √23 (between 4 and 5 on the number line)

D.√34 (between 5 and 6 on the number line)

E. √54 (between 7 and 8 on the number line)

F. √12 (between 3 and 4 on the number line)

G. √77 (between 8 and 9 on the number line)

H. √45 (between 6 and 7 on the number line)

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Let's assume that Gabriella traveled $x$ hours at 30 mph and $y$ hours at 10 mph. We know that the total trip took 8 hours, so we can write an equation based on the time:

$$x+y=8$$

We also know that the distance traveled going to the restaurant is the same as the distance traveled coming back home. Let's call this distance $d$. We can use the formula $d=rt$ to express this relationship:

$$30x=10y$$

Now we have two equations with two unknowns:

$$\begin{aligned} x+y&=8 \ 30x&=10y \end{aligned}$$

We can solve for $x$ and $y$ by using substitution. Solving the second equation for $y$, we get:

$$y=3x$$

Substituting this expression for $y$ in the first equation, we get:

$$\begin{aligned} x+3x&=8 \ 4x&=8 \ x&=2 \end{aligned}$$

Therefore, Gabriella traveled 2 hours at 30 mph and 6 hours at 10 mph.

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The probability of spotting 3 imperfections plates in 3 minutes is .3352.

The probability of spotting 3 imperfections plates in 3 minutes can be calculated using the binomial probability formula. This formula is used to calculate the probability of getting a certain number of successes in a certain number of trials (n), given a certain probability of success (p) for each trial.

In this case, the probability of success (p) is .15 and the number of trials (n) is 3. The formula for this is:

[tex]P(X = 3) = 3C3(.15)^3(1-.15)^(3-3)[/tex]

P(X = 3) = .3352

Therefore, the probability of spotting 3 imperfections plates in 3 minutes is .3352.

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The inverse function is R(L) = (360 - L)/15. It will take 8 weeks to pay loan if student owes $240 and 24 weeks to pay off the whole loan.

A. Let's start by defining the function L(w) as the amount owed w weeks after the student borrows the money. The student borrowed $360 and agreed to pay $15 per week, so the amount owed after w weeks can be calculated as:

L(w) = $360 - $15w

B. To find the inverse of function L, we need to switch the roles of the input and output variables. Let's call the inverse function R, where R(L) is the number of weeks it takes to pay off the loan if the amount owed is L. We can solve the equation from part A for w:

L(w) = $360 - $15w

$15w = $360 - L

w = (360 - L)/15

Therefore, the inverse function R(L) is:

R(L) = (360 - L)/15

This function tells us how many weeks it will take to pay off the loan for a given amount owed. For example, if the student owes $240, we can plug that into the inverse function to find out how many weeks it will take to pay off the loan:

R($240) = (360 - 240)/15 = 8

So it will take 8 weeks to pay off the loan if the student owes $240.

C. To find out how many weeks it will take to pay off the loan, we need to find the value of w when L(w) = 0 (i.e., when the loan is fully paid off). We can set L(w) = 0 and solve for w:

L(w) = $360 - $15w = 0

$15w = $360

w = 24

So it will take 24 weeks to pay off the loan.

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Answer:

2/3 is the answer .......mmm..

The total surface area of the rectangular prism is 25.92 square units.

Remember that the area of a rectangular prism whose dimensions are A, B, and C is equal to the sum of the areas of each of the faces, we can write this as:

total area = 2*[ A*B + B*C + C*A]

In this case we can write the dimensions as:

A = 2.7 units.

B = 1.8 units.

C = 1.8 units.

Then the total surface area of this prism is:

total area = 2*[  2.7 units*1.8 units.  +  2.7 units*1.8 units + 1.8 units*1.8 units]

total area = 2*[ 12.96 square units] = 25.92 square units.

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Complete question:

"Find the area of a prism whose dimensions are 2.7 by 1.8 by 1.8"

The altitude of drone is 8.4ft.

The angle generates in between the horizontal line and the line of sight when an observer looks upward is referred to as the angle of elevation in mathematics. It is always greater than the observer and at a larger angle.

The term "angle of depression" defined as the angle created when an observer looks down at an item and the horizontal line intersects with the line of sight. It gauges how our area of vision shifts as we see down.

In the given figure,

∠DTL=35°

LT=12ft

tan35°=DL/LT

tan35°=DL/12

DL=8.4ft

Hence, The altitude of drone is 8.4ft.

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Cinderella would weigh either 187 or 153 pounds this morning.

Unit cοnversiοn is the prοcess οf cοnverting a quantity expressed in οne unit οf measurement tο anοther equivalent quantity expressed in a different unit οf measurement. It invοlves using cοnversiοn factοrs that relate the twο units οf measurement. This is dοne by multiplying οr dividing the οriginal quantity by a cοnversiοn factοr, which is a ratiο οf the twο units οf measurement that is equal tο οne.

Cinderella's weight increased or decreased by 10%, we can find her weight this morning by multiplying her previous weight by 1.10 (to find a 10% increase) or 0.90 (to find a 10% decrease).

For a 10% increase, Cinderella's weight this morning would be:

170 x 1.10 = 187 pounds

For a 10% decrease, Cinderella's weight this morning would be:

170 x 0.90 = 153 pounds

So depending on whether her weight increased or decreased by 10%, Cinderella would weigh either 187 or 153 pounds this morning.

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As per the median, the set of data that fulfilling Marjane's requirement is 24, 25, 25, 25, 26, 26 (option c).

In statistics, data is a collection of numbers or values that represent a particular phenomenon. One way to measure central tendency, or the typical or representative value of the data, is through the median and the mode.

The median is the middle value when the data is arranged in numerical order, and the mode is the value that appears most frequently.

The third set of data is 24, 25, 25, 25, 26, 26.

The median is the middle value, which is also (25+25)/2 = 25.

The mode is the value that appears most frequently, which is 25.

Therefore, the mode and median are the same, fulfilling Marjane's requirement.

Therefore, the correct option is (c).

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Hence, the likelihood is 11/80, or roughly 0.138 as the player represented Spain, the likelihood that a randomly chosen athlete.

The likelihood or chance of an event occurring is measured by probability. It is a number between 0 and 1, where 0 denotes the impossibility of an event and 1 denotes its certainty. By dividing the number of favorable outcomes by the total number of possible outcomes, one can determine the probability of an occurring. Because there is only one desirable result (rolling a 3) out of six potential outcomes, the probability of rolling a 3 when using a fair six-sided die is 1/6. (rolling a 1, 2, 3, 4, 5, or 6).

given

The number of gold, silver, and bronze medals each player from each nation has earned is displayed in the table.

We need to utilize conditional probability to determine the likelihood that a randomly chosen player won a bronze medal provided that the player represented Spain.

The following formula determines the conditional probability of an event B given an event A:

P(A and B) = P(B|A) (A)

where P(A) is the likelihood that event A will occur and P(A and B) is the likelihood that events A and B will both occur.

In this instance, event A was the player representing Spain, and event B was the bronze medal the player took home.

The table reveals that 11 bronze medals were won by Spanish athletes. Moreover, the total number of medals won by Spanish athletes is:

20 + 18 + 42 = 80

Hence, given that the player represented Spain, the likelihood that a randomly chosen athlete would have earned a bronze medal is:

P(B|A) = 11/80

Hence, the likelihood is 11/80, or roughly 0.138 as the player represented Spain, the likelihood that a randomly chosen athlete.

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The student's original statement has an issue in the way the "not" operator is used. The "not" operator (!) is negating the entire expression, including the variable 'x', rather than just the inequality. This leads to incorrect evaluation.

To correctly determine if x is not greater than 20, you should use the "less than or equal to" (<=) operator instead. Here is the corrected statement:

if (x <= 20)

This statement will be true if x is less than or equal to 20, which is the intended condition.

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Answer: x= 71

Step-by-step explanation:

Since each triangle has a sun of all the angles to equal 180, we can figure what is X.

The probability that the ball that rolled out of the pit is red is 0.2 or 20%.

Now, let's apply this concept to Jose's ball pit problem. We know that Jose put 40 red balls, 55 purple balls, 45 yellow balls, and 60 green balls into the ball pit. The total number of balls in the pit is therefore:

Total number of balls = 40 + 55 + 45 + 60 = 200

Next, we know that one ball has rolled out of the pit. We want to find the probability that this ball is red. To do this, we need to calculate the probability of selecting a red ball from the total number of balls in the pit.

Probability of selecting a red ball = Number of red balls / Total number of balls

= 40 / 200

= 0.2 or 20%

This means that for every 10 balls that roll out of the pit, 2 of them are expected to be red.

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Answer:

3000

Step-by-step explanation:

you would multiply 500 times 60 because there are 60 minutes per hour

A minimum score of 88.95 is required to receive an "A" grade on the exam.

To determine the minimum score required to receive an "A" grade on an exam, we must first understand the meaning of standard deviation and mean. The mean is the average of a set of values, whereas the standard deviation is a measure of how far apart the values are from the mean. The minimum score required to receive an "A" grade is determined by calculating the z-score that corresponds to the top 12.3 percent of exam scores.

The formula for calculating the z-score is given as: z = (x - μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation. Solving for z, we have: z = invNorm(1 - 0.123) = invNorm(0.877) ≈ 1.15. The inverse normal distribution function is used to determine the value of z that corresponds to the area to the right of the z-score. We can then use the formula for the z-score to solve for the raw score (x):
x = zσ + μ
Substituting the values we have, we get:
x = 1.15(17) + 68 ≈ 88.95
Therefore, a minimum score of 88.95 is required to receive an "A" grade in the exam.

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The value that can be gotten from expression of 8 divided by 1/5 is 40.

In mathematics, division is an arithmetic operation that involves splitting a quantity or a number into equal parts or groups. It is the inverse operation of multiplication.

The division symbol is usually represented by a forward slash (/) or a division sign (÷). It is represented as "a ÷ b" or "a/b," where "a" is the dividend, "b" is the divisor, and the result is the quotient.

When we divide one number by another, we are essentially finding out how many times the divisor can fit into the dividend. For example, if we divide 10 by 2, we are asking how many times 2 can fit into 10. The answer is 5, so 10 divided by 2 is 5.

Given that  8 divided by 1/5, which can be expressed as ;

8 / (1/5)

= 8÷(1/5)

=8 * 5/1= 40

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Option B) H o: p = 0.5, H₁: p ≠ 0.5. This is a two-tailed test where the null hypothesis states that the proportion of people in the town who like chocolate ice cream is equal to the national average of 0.5.

The alternative hypothesis states that the proportion is either greater than or less than 0.5. This test is appropriate because it is comparing a single proportion (people in the town who like chocolate ice cream) to a known population proportion (the national average). The test statistic used would be a z-score, calculated using the sample proportion and the population proportion.

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Complete question is in the image attached below

Based on the attached figure, the volume of the composite figure is 408 cm³

A composite figure is a three-dimensional shape that is made up of two or more simpler shapes.

To find the volume of a composite figure, you need to break it down into its simpler shapes and then use the appropriate formulas to calculate the volume of each individual shape

The volume of the composite figure is:

Volume = area of base * height

Substituting:

Base area = (14 * 3) + (1/2)(5 + (14-6))(7 - 3) = 68 cm²; height = 6 cm

So, we have

Volume = area of base * height = 68 cm² * 6 cm = 408 cm³

This means that

The volume is 408 cm³

Hence, the volume is 408 cm³

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Answer:

Step-by-step explanation:

To find the equation of a line when you have two points, you can use the point-slope formula. Here's how to do it:

1. Find the slope of the line using the two points:

slope = (y2 - y1) / (x2 - x1)

where (x1, y1) = (0, 3) and (x2, y2) = (5, 3)

slope = (3 - 3) / (5 - 0) = 0/5 = 0

2. Use the point-slope formula to find the equation of the line:

y - y1 = m(x - x1)

where m is the slope, and (x1, y1) is one of the points on the line. Using (0, 3) as the point, we get:

y - 3 = 0(x - 0) or y = 3

So the equation of the line is y = 3, a horizontal line passing through y = 3.

The domain of this equation is all real numbers, since x can take on any value and y will always be 3.

The range of this equation is a single value, y = 3, since the line is horizontal and every point on the line has the same y value of 3.

If 7 cards are dealt from an ordinary deck of 52 playing cards, the probability that (a) exactly 2 of them will be face cards is 0.3601. and  (b) at least 1 of them will be a queen is 0.0008.

A) The probability that exactly 2 of the 7 cards dealt from an ordinary deck of 52 playing cards will be face cards is as follows:

      We need to use the formula for probability here. The probability formula is given by,

       Probability = Number of favorable outcomes/ Total number of possible outcomes.

The total number of possible outcomes = Number of ways 7 cards can be selected from 52 =  ₅₂C₇

A number of favorable outcomes = Number of ways 2 face cards can be selected from 12 face cards * Number of ways 5 nonface cards can be selected from 40 non-face cards

                                                      = ₁₂C₂ * ₄₀C₅

      Putting these values in the formula,

      Probability =  ₁₂C₂ * ₄₀C₅ / ₅₂C₇.

      Simplifying this gives Probability = 0.3601. (Rounded to four decimal places)

b) The probability that at least 1 of the 7 cards dealt from an ordinary deck of 52 playing cards will be a queen is as follows:

         Here, we can use the complement rule. i.e. we can calculate the probability of none of the 7 cards being a queen and subtract that from

  1. Total number of possible outcomes = Number of ways 7 cards can be selected from

                                                           52  =  ₅₂C₇

Number of favorable outcomes = Number of ways 7 non-queen cards can be selected from 48 non-queen cards = ₄₈C₇

Putting these values in the formula,

      The Probability of none of the cards being a queen = ₄₈C₇ / ₅₂C₇

Therefore, the Probability of at least 1 of the 7 cards being a queen

                     = 1 - ₄₈C₇ / ₅₂C₇ Probability of at least 1 queen

                     = 1 - 0.9992

                     = 0.0008 (rounded to four decimal places).

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