what is the domain and range for a parabola with the equation y=x^2-x-2

Using the numbers to indicate their locations as pairs of x and y values. Euclidean distance is used to measure all distances.

a. Using the k-means algorithm, we can group the points into three clusters based on their initial cluster centers. The first cluster consists of the points (18, 10), (21, 11), (22, 22), (24, 15), (26, 12), and (26, 13), the second cluster consists of the points (27, 14), (40, 27), (41, 29), (42, 20), and (44, 28), and the third cluster consists of the points (30, 33), (31, 39), (35, 37), (39, 44), (46, 21), (47, 30), (48, 31), and (49, 23).

The silhouette approach, which compares how similar each point is to the points in its own cluster to the points in other clusters, can be used to assess the quality of the clusters. A high silhouette value denotes a well-clustered point, while a low silhouette value denotes a possible incorrect cluster assignment.

b. In hierarchical agglomerative clustering, we first create individual clusters for each point, which are then combined to create a single cluster that contains all of the points. Depending on how they calculate the separation between clusters, the three distinct link approaches will result in a variety of clustering outcomes.

The minimal distance between any two points in each of the two clusters is used by single link to calculate the separation between the clusters. Because it only takes into account the closest pair of points, this can lead to long, thin clusters.

The distance between the clusters is calculated using the maximum distance between any two points in the two clusters. Due to the fact that it only takes into account the farthest pair of points, this can lead to compact, spherical clusters.

The average link calculates the separation between the two clusters by averaging out all of the distances between the points in the two clusters. This takes into account all possible pairs of points and may lead to clusters with more symmetrical shapes.

In general, a single link will create clusters that are the most compact, a complete link will create clusters that are the most spherical, and an average link will create clusters that are more evenly shaped.

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99.7% of the students scored between (44.67 , 56.33) i.e.

between 44 and 56.

Given, the mean of the final grades of the sample be 62.25 and the standard deviation be 4.5

On Subtracting 1 from your sample size, we get

100 – 1 = 99.

On Subtracting confidence level from 1, and then divide by two.

(1 – .997) / 2 = 0.0015

Now, df = 99 and α = 0.0015

from the table at df = 99 we got 2.262.

Divide your sample standard deviation by the square root of your sample size.

28 / √(100) = 2.8

Now, 2.262 × 2.8 = 6.33

So, the confidence interval be,

(100 - 6.33 , 100 + 6.33) = (44.67 , 56.33)

Hence, 99.7% of the students scored between (44.67 , 56.33) i.e.

between 44 and 56.

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Answer:

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

The time that runner takes to finish the race is 2.133 minutes.

A ratio is the relation between two numbers as a / b. A proportion is the equality of two ratios as a / b = c / d.

Ratio and proportion can be applied to solve Mathematical problems dealing with unit values of the quantities.

The speed of the runner is given as 3/8 miles per minute.

The remaining distance to be travelled is 7/8 miles.

Then, the time taken by the runner is the ratio of distance to be travelled to the speed. It can be written as follows,

Time taken by runner = (7/8)/(3/8)

                                    = 7/3

                                    = 2.133

Hence,the time taken by the runner to finish the race is 2.133 minute.

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yess it is true because of unbiased estimator

what is variance?

Variability is measured by the variance. The average of the squared deviations from the mean is used to calculate it. The degree of spread in your data set is indicated by variance. The variance is greater in respect to the mean when the data are more dispersed

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Answer:

$5.25 = 525 cents

525/7=75

each bottle is 75 cents or $0.75

Answer:

0.83 laps per minute

Answer: 0.83 laps per minute.

Step-by-step explanation:

The value of the test statistic using correlation coefficient and sample size is equal to 8.776 ( round up to 3 decimal places.)

As given in the question,

Sample size 'n' = 26

Correlation coefficient 'r' = 0.87

Significance level 'α' = 0.025

a. Decision rule for the system of hypothesis are:

Null hypothesis :  H₀ : ρ ≤0

Alternative hypothesis:  H₁ : ρ > 0

Value of the test statistic 't'

= r√n-2 / √1 - r²

= (0.87√ 26 - 2) / √1- 0.87²

= 4.3 / √0.2431

= 4.3 / 0.49

= 8.776

Therefore, value of the test statistic using the given values is equal to 8.776.

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Answer: B

Step-by-step explanation: One is a triangle and one is not. The bigger one has four sides therefore it is not a triangle

Answer:

  B. Not similar

Step-by-step explanation:

You want an appropriate choice of similarity reason for the triangles shown in the figure.

The side ratios in the smaller triangle are ...

  0.5 : 1 : 1 = 1 : 2 : 2

The side ratios in the larger triangle are ...

  2.25 : 3 : 3.5 = 9 : 12 : 14

The side ratios are not the same, so the triangles are not similar.

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The maximum number of miles you could go using the ride share service for $12 or less is 14 miles

The problem is solved by generating the equations

assuming x represents the number of extra miles

$5 is charged for the first 5 miles  and $0.50 per mile after that

This can be represented using the equation

total cost, y = $5 + $0.5x

$0.50 for the extra miles

Having $12 the number of miles is calculated as below

$12 = $5 + $0.5x

0.5x = 12 - 5

0.5x = 7

x = 7 / 0.5

x = 14 miles

The number of miles that can be paid for using $12 is 14 miles and this is the maximum number since the amount will result to lesser miles

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The answer is 3/5, or 60%

11 (comedies) + 19 (tragedies) = 30

30/50 = 3/5, or 60%

Answer:

After one year, the enrollment will be 600 + 40 = 640. After two years, the enrollment will be 640 + 40 = 680. After three years, the enrollment will be 680 + 40 = 720. After four years, the enrollment will be 720 + 40 = 760. After five years, the enrollment will be 760 + 40 = 800.

Step-by-step explanation:

We conclude that there is zero (0) fraction of coal left in the bag with Tom.

Any number of equal parts is represented by a fraction, which also represents a portion of a whole.

A fraction, such as one-half, eight-fifths, or three-quarters, indicates how many components of a particular size there are when stated in ordinary English.

The number is represented mathematically as a quotient, where the numerator and denominator are split.

Both are integers in a simple fraction.

A fraction appears in the numerator or denominator of a complex fraction.

The numerator of a proper fraction is less than the denominator.

So, a fraction of coal left in the bag:

After 1 week the was 2/3 full. So, we have:

1 - 2/3 = 1/3

Next week, he used the remaining 1/3 coal. Now, we have:

1/3 - 1/3 = 0/0

Therefore, we conclude that there is zero (0) fraction of coal left in the bag with Tom.

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Correct question:
Tom bought a bag full of coal. After one week the bag was 2/3 full. During the next week, he used 1/3 of the remaining coal. What fraction was left in the bag?

Answer:

[tex]a_{n}[/tex] = 18 - 3n

Step-by-step explanation:

there is a common difference between consecutive terms in the sequence, that is

12 - 15 = 9 - 12 = 6 - 9 = - 3

this indicates the sequence is arithmetic with nth term

[tex]a_{n}[/tex] = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

here a₁ = 15 and d = - 3 , then

[tex]a_{n}[/tex] = 15 - 3(n - 1) = 15 - 3n + 3 = 18 - 3n

The shortest length of fence that the rancher can use is 6000 ft.

What is meant by length?

The measuring of one thing from finish to finish or on its longest aspect, or a measuring of a selected a part of one thing is known as length.

Main Body:

x = width of rectangle

y = length of rectangle

A = area of rectangle = xy = 1500000 ft^2

L = length of fencing needed = 2(x + y) + x = 3x + 2y

L = 3x + 2(1500000/x) = 3x + 3(10^6)x^(-1)

As x –> 0+, L –> +inf.

As x –> +inf, L –> (3x)+.

Sketch and see that there will be a minimum in Quadrant I.

dL/dx = 3 - 3(10^6)x^(-2)

Extrema occur when dL/dx = 0:

3 - 3(10^6)x^(-2) = 0

(10^6)x^(-2) = 1

x^2 = 10^6

x > 0, so x = 1000 feet for shortest length.

Hence,Shortest L = 3000 + 3(10^6)(10^3)^(-1) = 6000 feet.

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Answer:1

Step-by-step explanation:

There is a lot more

The system of equations to represent the

number of quarters, q, and the number of

dimes, d, in the jar is

d + q = 50

0.10d + 0.25q = 8

The number of quarters and dimes in the jar is 20 and 30 respectively.

Let

d + q = 50

0.10d + 0.25q = 8

From (1)

d = 50 - q

Substitute into equation (2)

0.10d + 0.25q = 8

0.10(50 - q) + 0.25q = 8

5 - 0.10q + 0.25q = 8

- 0.10q + 0.25q = 8 - 5

0.15q = 3

divide both sides by 0.15

q = 3/0.15

q = 20

Substitute q = 20 into (1)

d + q = 50

d + 20 = 50

d = 50 - 20

d = 30

In conclusion, the given situation can be solved using simultaneous equation where number of dimes and quarters are 30 and 20 respectively.

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Answer:

29/5 or 5.8

Step-by-step explanation

First, we put the 1 on the other side which turns it positive 5y=29

Then, we divide 29 by 5 which gives us 29/5 which is equal to 5.8

Since the sun must rise tomorrow, then the probability of the sun rising tomorrow is much larger than one.

Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. The probability of an event is a number between 0 and 1, where, roughly speaking, 0 indicates impossibility of the event and 1 indicates certainty. The higher the probability of an event, the more likely it is that the event will occur. A simple example is the tossing of a fair (unbiased) coin. Since the coin is fair, the two outcomes ("heads" and "tails") are both equally probable; the probability of "heads" equals the probability of "tails"; and since no other outcomes are possible, the probability of either "heads" or "tails" is 1/2 (which could also be written as 0.5 or 50%).

These concepts have been given an axiomatic mathematical formalization in probability theory, which is used widely in areas of study such as statistics, mathematics, science, finance, gambling, artificial intelligence, machine learning, computer science, game theory, and philosophy to, for example, draw inferences about the expected frequency of events. Probability theory is also used to describe the underlying mechanics and regularities of complex systems.

Firstly, it is important to clarify that when people say ‘‘The Sun Will Rise Tomorrow’ they are implying only how It only appears to an observer on earth that the sun rises and sets. In reality the sun neither rises nor sets it only appears to do so because the earth takes one day (24 hours to rotate on its axis). It has appeared to do this for as long as the earth has existed (approx. 4.5 billion years). Although for the purpose of this short reflection, the idiom will signify part of the day-night process -being able to see the sun rise from the perspective of a human on earth.

Although the chances might be extremely high, they are not certain. Even thought it may be very improbably unless an infinite amount of days in which the sun has risen has occurred, the probability will not exactly be one. Ludwig Wittgenstein, Austrian-British philosopher who worked primarily in logic and philosophy of mathematics, said, “It is an hypothesis that the sun will rise tomorrow: and this means that we do not know whether it will rise.” Although we may reasonably argue that the earth while rise tomorrow to a 99.99999999% chance, there still is that 0.000000001 which states that it would not in fact rise.

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Mathwy is To solve this type of3.4 x 10-2 PEMDAS

Answer: 2 1/4

Step-by-step explanation:  If you  add all those numbers like : 1/3+3/4+4/6+1/2 = and you will get 2 1/4

Answer:

[tex]2\frac{1}{4}[/tex]

Step-by-step explanation:

add them all and you'll get that answer

Answer: (x+2) (x+4)

Hope this helps!

By conducting simple mathematical operations, we know that Joe eats 11/20 times more pizza than Jane.

A mathematical function known as an operation converts zero or more input values into a precisely defined output value.

The quantity of operands affects the operation's arity.

The order of operations is a rule that outlines the proper steps to take when analyzing a mathematical equation.

We can recall the PEMDAS steps in the following order: parentheses, exponents, multiplication, and division (from Left to right), addition, and subtraction (from left to right).

So, we know that:

Jow eats 4/5 of the pizza.

Jane eats 1/4 of the pizza.

Times Joe eats more pizza than Jane:

4/5 - 1/4

4(4) - 5(1)/20

16 - 5/20

11/20

Therefore, by conducting simple mathematical operations, we know that Joe eats 11/20 times more pizza than Jane.

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In a natural deduction problem, if your conclusion is a conditional statement that does not appear in any of the premises, then it is not a valid argument.

Natural deduction is a process/theory that we use to derive the conclusion of any argument from the premises by using the rules of inference. Now, as the definition itself has established, in natural deduction problems we solve arguments from the premise. But in the argument, we have been told that the conclusion isn't from the premises.

Any argument or conclusion becomes valid if the premise is valid as well. This means that if the conclusion is not in the premise, then it is not valid.

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Answer:

no she will have 24 flowers left

Step-by-step explanation:

,Lm

Answer:

[tex]\frac{8}{b^{30} }[/tex]

Step-by-step explanation:

Start within the parentheses

1. Divide coefficients

6/3 = 2

2. Divide variables

When dividing exponents with the same base, in this case b, you subtract.

b^20 - b^30 = b^-10

3. Exponent outside parentheses

When there's an exponent on an exponent, you multiply the exponents.

(2b^-10)^3

8 b^-30

4. Simplify?

This step isn't necessary, but when you have a negative exponent on a variable, the variable can be put in the denominator with a positive exponent.

8b^-30 can become 8/b^30

Answer:

  22√3 inches

Step-by-step explanation:

You want to know the length of the longer leg of a 30°-60°-90° triangle when the hypotenuse is 44 inches.

The ratios of side lengths in a 30°-60°-90° triangle are ...

  1 : √3 : 2

This means the longer leg is (√3)/2 times the length of the hypotenuse.

In the given triangle, the longer leg is ...

  (44 in)(√3)/2 = 22√3 in

you're ordered to attempt to memorize a series of images. there are 15 images in the series. when you are asked to state the order of the images you remember the first 3 and then it starts to get fuzzy. This is an example of memory retrieval.

What do you mean by series?

The total of a particular sequence of terms is known as a series in mathematics. These phrases often refer to real or complex numbers, though considerably more generality is possible.

In calculus and its generalization, mathematical analysis, the study of series plays a significant role. Most mathematical disciplines employ series, including combinatorics, where generating functions are employed to explore finite structures.

Along with being widely utilized in mathematics, infinite series are also frequently employed in other quantitative fields like physics, computer science, statistics, and finance.

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The pValue is 0.15625 > 0.05 when  brand1 killed all ants in 65 of 100 containers within two hours, and brand 2 killed all ants in 58 of 100 containers within two hours in hypothesis.

Let A represent the new pesticide and B be the Ant Killer. Then, you are given that

Brand1 kills ants in 65 of 100 containers:

Xa = 65/100 = 0.65

Brand2 kills ants in 58 of 100 containers:

Xb = 58/100 = 0.58

You know need to find sample variance for both,

s²A =∑(Xi - Xa)²

= 65(1-0.65)² + 35(0 - 0.65)²

= 22.75

s²B =∑(Xi - Xb)²

= 59(1-0.59)² + 41(0 - 0.59)²

= 24.19

You can know do a test for significance

t = (Xa - Xb) / √(sA /nA) +(sB/nB)

and derive the conclusion from there.

Here, Null and alternative hypothesis are generally,

Alternative hypothesis

Here, there are three samples are assumed. They are:

i) Samples are taken independently

ii) Samples must be selected randomly

iii) n₁p₁ ≥ 5 , n₁q₁ ≥ 5, n₂p₂ ≥ 5, n₂q₂ ≥ 5

i.e., p₁ = 0.65 ; p₂ = 0.58 , n₁ = 100

q₁ = 0.35 ; q₂ = 0.42 , n₂=100

Corresponding p-value at Z = 1.01722

p-value = 0.15625 > 0.05

Hence, the pValue is 0.15625 > 0.05 when  brand1 killed all ants in 65 of 100 containers within two hours, and brand 2 killed all ants in 58 of 100 containers within two hours in hypothesis.

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It will take approx. 8.3 weeks to completely pay the remaining amount after the down payment.

Given, Leonardo put a $600 ring on layaway by making a 10% down payment and agreeing to pay $65 a week.

So, he made a down payment of 10% of $600 i.e. $60

remaining amount to pay be,

600 - 60 = 540

Let he will take x weeks to pay the remaining amount.

Now, if he pay $65 per week

then, 65x = 540

x = 540/65

x = 8.31

So, it will take approx. 8 - 9 weeks to completely pay the remaining amount after the down payment.

Hence, it will take approx. 8.3 weeks to completely pay the remaining amount after the down payment.

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Answer:

9 weeks

Step by step explanation:

It’s right.