can someone help me with this?

A)  The mean of 2018 scores: μ₂₀₁₈ = 75

 The mean of 2019 scores: μ₂₀₁₉ = 75

 The standard deviation of 2018 scores: s₂₀₁₈ = 2.07

 The standard deviation of 2019 scores: s₂₀₁₉ = 5.26

B) The primary difference is that variation is higher in the 2018 season than the 2019 season.

A)

We know that the mean is nothing but the sum of all scores divided by the number of scores.

Thus the mean for 2018 scores is:

μ₂₀₁₈ = (73 + 77 + 78 + 76 + 74 + 72 +74 + 76)/8

μ₂₀₁₈ = 75

Similarly the mean for 2019 scores is:

μ₂₀₁₉ = (70 + 69 + 74 + 76 + 84 + 79 + 70 + 78)/8

μ₂₀₁₉ = 75

We know that the formula for the standard deviation is:

\(s=\sqrt{\frac{\sum (x_i - \bar{x})^2}{n-1} }\)

where s sample standard deviation

n the size of the sample

\(x_i\) each value from the sample

\(\bar{x}\) the sample mean

Using this formula, the standard deviation for 2018 scores is:

s₂₀₁₈ = \(\frac{\sqrt{ (73-75)^2 + (77-75)^2 + (78-75)^2 + (76-75)^2 + (74-75)^2 + (72-75)^2 +(74-75)^2 + (76-75)^2} }{7}\)

s₂₀₁₈ = 2.07

And the standard deviation for 2019 scores is:

s₂₀₁₉ = \(\frac{\sqrt{ (70-75)^2 + (69-75)^2 + (74-75)^2 + (76-75)^2 + (84-75)^2 + (79-75)^2 +(70-75)^2 + (78-75)^2} }{7}\)

s₂₀₁₉ = 5.26

B)

We cwn observe that both the two years have the same mean but the 2019 scores have higher variation as compared to 2018 scores.

Thus, the variation in scores was higher in 2019.

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Find the complete question below.

In a transportation problem, the activities correspond to the shipping lanes while the supply of each activity is the quantity shipped.

In the transportation problem, activities are the shipping lanes that are taken to transport goods from sources to destinations.

The quantities to be shipped are known as supplies or availabilities. The transportation problem is a linear programming problem that is used to determine how to allocate resources to obtain a minimum cost or maximum profit.The transportation problem is one of the most widely used problems in linear programming. It is used to solve many real-world problems such as supply chain management, production planning, and logistics.

In the transportation problem, we are given a set of sources and a set of destinations. The supply and demand at each source and destination are also given. The objective is to minimize the total cost of transporting the goods from sources to destinations while satisfying the demand and supply constraints.

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Answer:

a = 3

Step-by-step explanation:

2(a−4)+15=132

a−8+15=132

a=13−15+82

a=6

a=6/2

a=3

Answer: A is the correct answer (an =2,250+250(n-1)

Step-by-step explanation:

I hope this helped have fun cheating on the mid terms baddiesss

The mean GPA is greater than 2.75.

To find the GPA:

Therefore, the mean GPA is greater than 2.75.

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Answer:

Please mark my answer as Brainliest if you like it dear

Answer:

=> x° + 57° + (43°+24°) = 180° ------------ (angle sum property of ∆)

=> x° + 57° + 67° = 180°

=> x° + 124° = 180°

=> x° = 180° — 124°

_______________________________

_______________________________

=> x° + y° + 43° = 180° ------------- (angle sum property of ∆)

=> 56° + y° + 43° = 180°

=> y° + 99° = 180°

=> y° = 180° — 99°

______________________________

______________________________

=> y° + z° = 180° ------------- (Linear pair)

=> 81° + z° = 180°

=> z° = 180° — 81°

Step-by-step explanation:

so,

The following a probability model? what do we call the outcome No, the provided information is not sufficient to determine if it is a probability model. The outcome "red" is typically referred to as an event.

A probability model is a mathematical representation of a random experiment, where the sample space is defined, and probabilities are assigned to all possible outcomes. To determine if the given information is a probability model, we would need to know the complete list of possible outcomes, their corresponding probabilities, and ensure that the probabilities meet the necessary conditions (sum up to 1 and are non-negative).

Based on the limited information provided, we cannot determine if it is a probability model. The outcome "red" is called an event in the context of probability.

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The measure for each interior angle of the regular polygon in this problem is given as follows:

154.3º.

A polygon is classified as a regular polygon if it has these two features listed as follows:

The sum of the interior angle measures of a polygon with n sides is given by the equation presented as follows:

S(n) = 180 x (n - 2).

Hence each angle measure of a regular polygon of n sides is given as follows:

S(n)/n = 180 x (n - 2)/n.

The number of sides for the polygon in this problem is given as follows:

n = 14.

Hence each angle measure is given as follows:

180 x 12/14 = 154.3º.

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The expected value in a binomial situation with n = 18 and π = 0.60 is E(X) = np = 18 * 0.60 = 10.8.

In a binomial situation, the expected value, denoted as E(X), represents the average or mean outcome of a random variable X. It is calculated by multiplying the number of trials, denoted as n, by the probability of success for each trial, denoted as π.

In this case, we are given n = 18 and π = 0.60. To find the expected value, we multiply the number of trials, 18, by the probability of success, 0.60.

n = 18 (number of trials)

π = 0.60 (probability of success for each trial)

To find the expected value:

E(X) = np

Substitute the given values:

E(X) = 18 * 0.60

Calculate the expected value:

E(X) = 10.8

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Answer:

- 4, - 3, - 2, - 1, 0, 1

Step-by-step explanation:

- 15 < 3n < 6 ( divide each interval by 3 )

- 5 < n < 2

then integer value of n are - 4, - 3, - 2, - 1, 0, 1

Answer:

x = -11

Step-by-step explanation:

-6x+7x+14=3

Add like terms:

x+14=3

Subtract 14 on both sides:

x=-11

The simplified expression is 26 - 4x.

To simplify the expression 6 - 4(x - 5), we can apply the distributive property and simplify the terms.

6 - 4(x - 5)

First, distribute -4 to the terms inside the parentheses:

6 - 4x + 20

Now, combine like terms:

(6 + 20) - 4x

Simplifying further:

26 - 4x

Therefore, the simplified expression is 26 - 4x.

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Answer: 0  4  8  12  16

              30  27  24  21  18

Step-by-step explanation:

0 + 4 = 4       4 + 4  = 8     8 + 4 = 12   12 + 4 =  16

30 - 3 = 27     27 - 3 = 24    24 - 3 = 21    21 - 3 = 18

Answer:

Step-by-step explanation:

First column add 4  second column subtract 3

0,30

4,27

8,24

12,21

16,18

a+c = b+d , because angle c = angle b and a = d

Angles in parallel lines are angles that are created when two parallel lines are intersected by another line called a transversal.

Angles on parallel lines can be alternate, corresponding or verically opposite to each other. And when they have these properties, the angles are equal to reach other.

b = c , since b+y = 360 and c+y = 360

and also a + x = 180

d + x = 180

therefore a = d

Therefore;

in b+d , we can substitute c for a and b for c

therefore b+d = a+c

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Answer:

4x^3^y2/y hope this helps

Step-by-step explanation:

Answer:

I'm not sure but it might be 4x³y

I might've misunderstood cause it's kinda hard to read.

Answer: Hi!

Sara had 2/3 of a piece of cake. Jasmine had 2/5 of a piece of cake. How much cake did Sarah and Jasmine have in total?

Hope this helps!

Answer:

If Kaylah had 2/5 of a pizza, and Allia had 2/3 of a pizza how much would they eat together?

Answer: Denominators are the bottom number or variable on a fraction.

Step-by-step explanation:

Answer:

A denominator is the bottom number in a fraction, the top number is the numerator.

                4 = DENOMINATOR

Hope this helped, please give me branliest!

The weight of the three brothers, Xavier, Yosef and Zeke are 35 lbs, 65 lbs and 100 lbs respectively.

Given:

Total weight = 200 pounds

Xavier weight = x

Yosef weight = y

Zeke weight = z

Xavier and Yosef together are equal to Zeke.

x + y = z (1)

Yosef is 5 less than twice Xavier

y = 2x - 5 (2)

substitute y = 2x - 5 into (1)

x + y = z (1)

x + (2x - 5) = z

x + 2x - 5 = z

3x - 5 = z

Recall

x + y + z = 200

x + (2x - 5) + (3x - 5) = 200

x + 2x - 5 + 3x - 5 = 200

6x - 10 = 200

6x = 200 + 10

6x = 210

x = 210/6

x = 35 lbs

Therefore,

y = 2x - 5

= 2(35) - 5

= 70 - 5

y = 65 lbs

and

3x - 5 = z

3(35) - 5 = z

105 - 5 = z

100 lbs = z

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Answer:

y + 4 = 12 ( x - 1 )

Step-by-step explanation:

→ Work out the gradient

\(\frac{-4-8}{-1-0} =12\)

→ Substitute the numbers into the y - y₁ = m ( x - x₁ )

y + 4 = 12 ( x - 1 )

Answer:

The answer is x=9 :)

Henry could only see one line since both lines had the same slope, which means that the graphs of both equations will be identical and hence overlap.

Linear equations in a system 3x + 2y = 4, and 9x + 6y = 12

We must demonstrate why Henry could only make out one line when he plotted the equations 3x-2y=4 and 9x-6y=12 on a graph.

Take the provided linear equation system into consideration.

3x - 2y = 4 ................(1)

9x - 6y = 12 ..................(2)

Due to the fact that equation (2) is a multiple of equation (1), 3 (3x - 2y = 4) = 9x - 6y = 12

The slopes of the provided equations are also same.

Difference with regard to x for equation (1) yields,

additional to equation (2),

With regard to x, we can differentiate to get,

The graphs of both equations will overlap since both lines have the same slope and hence have the same appearance on the graph.

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Answer:

The true statements are the 1st, 2nd, and 4th statement.

Answer: 9.7 seconds

Step-by-step explanation:

\(16t^2 =1503\\\\t^2 =1503/16\\\\t=\sqrt{1503/16} \text{ } (t > 0)\\\\t \approx 9.7\)

The value of the expression 2/3 x -4/5 is -8/15.

Multiplication is a mathematical arithmetic operation. It is also a process of adding the same types of expression some number of times.

Example - 2 × 3 means 2 is added three times, or 3 is added 2 times.

Given:
An expression,

2/3 x -4/5.

Here, we have to multiply the fraction.

So,

2/3 x -4/5,

= -8/15

Therefore, -8/15 is the value.

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Answer:

1 cup = 1/1

Step-by-step explanation:

1 cup = 8oz = 16Tbs

The perimeter of the quadrilateral is 30 cm.

Let's assume the quadrilateral is ABCD, with side lengths AB, BC, CD, and DA. Since the quadrilateral is circumscribed around a circle, we know that opposite sides are equal in length. Let's consider AB and CD as the two opposite sides whose lengths add up to 15 cm. Therefore, AB + CD = 15 cm.

Since opposite sides of a circumscribed quadrilateral are equal, BC and DA will also have a combined length of 15 cm. Thus, BC + DA = 15 cm.

To find the perimeter of the quadrilateral, we sum up the lengths of all four sides: AB + BC + CD + DA.

Since AB + CD = 15 cm and BC + DA = 15 cm, the perimeter of the quadrilateral is 15 cm + 15 cm = 30 cm.

Therefore, the perimeter of the quadrilateral is 30 cm.

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I'm not exactly at the best place atm (especially because i was using this app all day lol) but if suggest doing the smaller, easier things first. Then moving to things you are more intrested in and excel at. If you ahve something that is a priority, try and move that after the first couple easy things or immediate.

Answer:

honestly just take good notes and pay attention in class. when studying make sure you are in a quiet area and make sure you know what youre studying. when it comes to getting good grades pay attention in class. do not be afraid to ask your teacher questions. good luck :)

The domain of the function is `R` and the y-intercept is `(0, -3)`

Given, `y = log4(2x + 1) - 3`.

To determine the domain of the function,

we should look for all values of `x` that would make the given function undefined.

There are no real values of `x` that would make the function undefined.

Therefore, the domain of the function is all real numbers or `R`.

To determine the y-intercept, substitute `x = 0` in the given function.`

y = log4(2(0) + 1) - 3 = log4(1) - 3 = 0 - 3 = -3`

Therefore, the y-intercept of the function is `(0, -3)`.

Hence, the domain of the function is `R` and the y-intercept is `(0, -3)`.

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