80% of 40 please help me

No, the standardized test statistic t does not indicate that you should reject the null hypothesis.

The value of the test statistic t only tells you how much of an effect the independent variable has on the dependent variable. To determine whether to reject the null hypothesis, you must compare the value of t to a critical value based on the sample size, the level of significance, and the degrees of freedom.

The standardized test statistic t does not indicate whether you should reject the null hypothesis. To determine this, you must compare the value of t to a critical value based on the sample size, level of significance, and degrees of freedom.

No, the standardized test statistic t does not indicate that you should reject the null hypothesis.

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Answer:

a. A function f such that the equation f(x + h) = f(x) + f(h) is not true for all values of x and h is a function that is not linear. For example, a function f(x) = x^2 is not linear because it does not satisfy the equation f(x + h) = f(x) + f(h).

b. A function f such that the equation f(x + h) = f(x) + f(h) is true for all values of x and h is a linear function. For example, a function f(x) = mx + b, where m and b are constants, is a linear function because it satisfies the equation f(x + h) = f(x) + f(h).

c. Let f(x) = 2x. If we choose x = 3 and h = 2, then f(x + h) = f(3 + 2) = f(5) = 2(5) = 10, and f(x) + f(h) = f(3) + f(2) = 2(3) + 2(2) = 6 + 4 = 10. Therefore, the equation f(x + h) = f(x) + f(h) is true in this case.

Answer:

110 cm^2 & 39 cm^3

Step-by-step explanation:

Volume = Length x Width x Height. With that in mind, volume is 39 cm^3

Surface Area = Area of all the shapes

2(13 x 1) + 2(13 x 3) + 2(3 x 1) =110 cm^

On solving the provided question, we can say that from the graph we have a equation [tex]y = x^2 - 3x - 4[/tex] => y= x(x+1) - 4(x+1) => y = (x+1)(x-4)

Mathematicians use here  graphs to logically convey facts or values using visual representations or charts. A graph point will typically reflect a relationship between two or more things. Nodes, or vertices, and edges make form a graph, a non-linear data structure. Glue together the nodes, often referred to as vertices. This graph has vertices V=1, 2, 3, 5, and edges E=1, 2, 1, 3, 2, 4, and (2.5), (3.5). (4.5). Statistical charts (bar charts, pie charts, line charts, etc.) graphical representations of exponential growth. a logarithmic graph in the shape of a triangle

from the graph we have a equation

[tex]y = x^2 - 3x - 4[/tex]

y= x(x+1) - 4(x+1)

y = (x+1)(x-4)

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The value of m∠1 is 50°. The solution is obtained using properties of angle and triangle.

What is an angle?

When two rays are brought together at a single point, an angle is created. The two rays in this instance are referred to as the arms of the angle, while the common point is known as the node or vertex. The symbol "∠" stands for an angle. Angle is a derivative of the Latin word "Angulus."

In the figure, we are given a right-angled triangle which means that one angle in the triangle measures 90°.

We are given an exterior angle equal to 140°.

We know that angles on a straight line form a linear pair which means that their sum is 180°.

Let the angle on the straight line be 'x'.

So, we get

⇒x + 140° = 180°

⇒x = 40°

Now, we know that in a triangle, the sum of all the angles is 180°.

Therefore,

⇒m∠1 + 90° + 40° = 180°

⇒m∠1 + 130° = 180°

⇒m∠1 = 50°

Hence, the value of m∠1 is 50°.

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Answer:

26

Step-by-step explanation:

To find the mean score of all six quizzes, you add all the scores and divide by the number of examinations. So if Percy's first five quiz scores are 24, 27, 22, 21, and 18, the total is 112. To find the mean score of all six quizzes, add Rachael's sixth quiz score to the total and divide by 6.

If the mean score of all six quizzes is 23, then the total score of all six examinations is 138 (23 x 6).

To find the score Rachael needs on her sixth quiz, you subtract Percy's score (112) from the total score of all six examinations (138)

Rachael needs to score 26 on her sixth quiz (138 - 112) for the mean and median of her quiz scores to be 23

3/10

Explanation

The total number of people that are studying neither Russian nor Spanish will be subtracted from the total number of people

i.e 80-23=57

Now let's calculate those that studies both languages (x)

50+31-x=57

-x=57-50-31

-x=-24

x=24

probability of choosing those that studies both Spanish and Russian is

24/80=3/10

Answer:

33 out of 80 pupils

Step-by-step explanation:

Total = 80 pupils

Studying Russian and Spanish = 80 - 23;

= 57 pupils

Out of 57 pupils, 50 pupils study Russian = 7 diff.

Out of 57 pupils 31 pupils study Spanish = 26 diff.

The probability of the person over 40 years of age who drinks root beer is equal to 0.1176.

As given in the question,

Total number of people is equal to 255

From the given table :

Number of people who drinks root beer and over 40 years of age is

= 30

Required probability  who drinks root beer and over 40 years of age is given by :

= ( Number of favourable outcomes ) / ( total number of outcomes )

= ( 30 / 255 )

= 0.1176

Therefore, the required probability of the people over the age of 40 years and drinks root beer is given by 0.1176.

The above question is incomplete , the complete question is :

                                          Cola                     Root Beer              Lemon-line

Under 21 years of age  :       40                        25                         20

Between 21 and 40      :        35                        20                        30

Over 40 years of age   :        20                        30                        35                 If one of the 255 subjects is randomly selected, find the probability that the person is over 40 years of age or that they drink root beer.

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Answer:

Please see answer below

Step-by-step explanation:

An estimate is an answer to a problem that is close to the solution, but not necessarily exact. Estimation usually requires rounding

Usually you perform the estimate prior to computing actual values.

Let's look at the numbers

591 can be rounded to 600, 211 can be rounded to 200

Then, in your equations instead of using actual numbers we use the estimates

600 - 200 = 400

500 - 400 = 100

Note this is off quite a bit because we are rounding to the nearest 100

Instead if we round to the nearest tens we get

591 ==> 590
211 ==> 210

520==> 520

So we get

590 - 210 = 380

520 - 380 = 140

A little more work but a more accurate estimate

A total of 57 student tickets and a total of 41 adult tickets were sold to generate a total revenue of $703.

A mathematical statement known as an equation is composed of two expressions joined together with the equal sign. A formula would've been 3x - 5 = 16, for illustration.. When this equation is solved, we discover that the quantity of the variables x is 7.

The following response has been produced in a straightforward, step-by-step manner.

Step: 1

Price of each student ticket = $ 5.50

Price of each adult ticket = $ 9.50

If x Equals the quantity of student tickets sold

If y Equals the quantity of adult tickets sold,

Step: 2

(i). It is given that a total of 98 tickets were sold.

Therefore, we can write as -

(Number of student tickets sold) + (Number of adult tickets sold) = 98

x+y =98 -----------equation (1)

Step: 3

(ii). The total revenue earned from the sale of tickets was $703.

Therefore, we can write as -

(Revenue earned from selling student tickets) + (Revenue earned from selling adult tickets) = 703

(Price of each student ticket×Number of student tickets sold) + (Price of each adult ticket ×Number of adult tickets sold) = 703

(5.50 × x)+ (9.50 × y) =703

5.50x+9.50y =703 ----------equation 2

Step: 4

System of Equations :

1) x+y =98

2) 5.50x + 9.50y =703

On performing (eq 2) - 5.50(eq 1), we get -

(5.50x +9.50y) - 5.50(x+y)=703-5.50(98)

5.50x + 9.50y - 5.50x-5.50y=703-539

4y=164

y=164/4

y=41

The operation was performed to reduce the equation in a single variable.

Step: 5

On substituting the value of y=41 in eq 1 , we get-

x+41 =98

x= 98-41

x=57

Thus, a total of 57 student tickets and a total of 41 adult tickets were sold to generate a total revenue of $703.

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[tex]$\left(9 \times 10^{-3}\right)^2$[/tex] can be wrltten in sclentlflc notation as[tex]$8.1 \times 10^{-5}$[/tex]

A number is written in scientific notation if it can be written as [tex]$p \times 10^x$[/tex]where p has value greater than or equal to 1 and less than 10 and x is an integer.

Given[tex]- $\left(9 \times 10^{-3}\right)^2$[/tex]

Flrst applying [tex]$(a b)^2=a^2 b^2$[/tex]

We get, [tex]$\left(9 \times 10^{-3}\right)^2=9^2 \times\left(10^{-3}\right)^2$[/tex]

using property of exponents [tex]$\left(a^n\right)^m=a^{n m}$[/tex]

[tex]$9^2 \times\left(10^{-3}\right)^2=81$[/tex] times [tex]$10^{-6}$[/tex]

Thus, we have to write 81 times[tex]$10^{-6}$[/tex]In scientific notation,

Multiply and divide by 10 , we get

81 times [tex]$10^{-6}=8.1 \times 10^{-5}$[/tex]

Thus, [tex]$\left(9 \times 10^{-3}\right)^2$[/tex]can be written in scientific notation as [tex]$8.1 \times 10^{-5}$[/tex]

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To create the tables and calculate the average mean, we need to have a set of data that we want to organize in a tabular form. The table should have columns for the data values, frequency, and frequency subtotal. The frequency column will show how many times a particular data value appears in the set.

The frequency subtotal column will be used to find the sum of the product of each data value and its corresponding frequency.

The average mean can be calculated by dividing the sum of the frequency subtotal by the total frequency.

Mean = ([tex]f_{1}x_{1}[/tex] + [tex]f_{2}x_{2}[/tex]+ [tex]f_{3}x_{3}[/tex]+ ... + [tex]f_{n}x_{n}[/tex]) / ([tex]f_{1}[/tex]+[tex]f_{2}[/tex]+[tex]f_{3}[/tex]+...+[tex]f_{n}[/tex])

By creating this table, we can easily see the distribution of the data and can calculate the average mean. This method of organizing data in tabular form is commonly used in statistics and data analysis, and it is an efficient way of summarizing and understanding large sets of data.

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Answer:

1 hour 50 minutes

Step-by-step explanation:

Total distance from parking lot to entrance = 22 miles

We will assume that the total distance from entrance to lot is also 22 miles

The average speed of the boat = 20mph

The average speed of the train is 10 mph faster = 20 + 10 = 30 mph

Time taken for travel from parking lot to park by train  = 22/30 hours

22/30 hours = 22/30 x 60 minutes = 44 minutes

On the way back, the boat was taken
Distance = 22 miles, speed = 20 mph

Time taken = distance/speed = 22/20 hours

22/20 hours = 22/20 x 60 minutes = 66 minutes

Total round trip time taken = 44 + 66 = 110 minutes

110 minutes = 110/60 hours

= 1 50/60 = 1 hour 50 minutes

The cost function is minimized when the predicted values are as close as possible to the actual values, which is achieved by finding the optimal values of the parameters θ.

What is the least squares cost function?

The least squares cost function for linear regression is used to measure the difference between the predicted values and the actual values of the target variable. It is defined as the sum of the squared differences between the predicted values and the actual values.

The compact form of the cost function is given by:

J(θ) = (1/2m) * Σ(i=1 to m) (hθ(x^i) - y^i)^2

where:

hθ(x^i) is the predicted value of the target variable for the ith sample, given by the hypothesis function hθ(x^i) = θ^T * x^i

y^i is the actual value of the target variable for the ith sample

θ is the vector of parameters for the linear regression model

m is the number of samples in the dataset

Hence, The cost function is minimized when the predicted values are as close as possible to the actual values, which is achieved by finding the optimal values of the parameters θ.

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The procedures below can be used to determine a triangle's length BD.

In th that is presented;

The holding ratio is, therefore, as follows:

12 : x = 27 : x + 5

12 / x = 27 / (x + 5 )

When we cross multiply these, we obtain:

12 ( x + 5 ) = 27x

12x + 60 = 27x

Taking the x values on one side, we obtain:

27x - 12x = 60

15x = 60

x = 60/15

x= 4

The length of line BD is:

= BC + CD

= x + x + 5

After entering the value of x, we get

= 4 + 4 + 5

= 13

As a result, the length of the line BD is 13.

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The statements that are listed above that are not propositions include the following:

A proposition statement is defined as the statement that is either a true statement or false statement but can not be both.

From the given statements,the statement that is a true proposition include the following:

The statement that is a false proposition include the following:

The statement will you be my valentine? is not a proposition but a declarative question that needs to be answered.

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The graph that shows a system of equations with infinite solutions is graph C.

Here we have some systems of equations graphed.

A system of equations has infinite solutions when both equations are equivalent (in this case, both equations represent the same line)

Then we we look at the graph of the system of equations we will see a single graph instead of two, like what we can see on option C.

The graph that shows infinite solutions is graph C (the one in the top right side).

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Answer:

HJ = 8.4

Step-by-step explanation:

tangents to a circle from an external point are congruent , then

HJ = HI

the angle between a tangent and a radius of the circle at the point of contact is a right angle.

so Δ OHI is right with ∠ OIH = 90°

using Pythagoras' identity in the right triangle

HI² + OI² = OH² , that is

HI² + 8² = 11.6²

HI² + 64 = 134.56 ( subtract 64 from both sides )

HI² = 70.56 ( take square root of both sides )

HI = [tex]\sqrt{70.56}[/tex] = 8.4

Then

HJ = HI = 8.4

The volume of the given cylinder is 11304 cm³.

Volume is the measure of the capacity that an object holds.

Formula to find the volume of the object is Volume = Area of a base × Height.

Given that, radius of a cylinder is 20 cm and depth of a cylinder is 9 cm.

We know that, the volume of a cylinder is πr²h.

Now, volume = 3.14×20²×9

= 3.14×400×9

= 11304 cm³

Therefore, the volume of the given cylinder is 11304 cm³.

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Answer:

5089.4cm

Step-by-step explanation:

9² x pi x 20 =5089.3800

The standard deviation is $8,000. So, the standard deviation measured in thousands of dollars, is 8. and The mean is the average. So the average, measured in thousands of dollars, is 56.

Average salary: 56

Standard deviation of the salary: 8

$56,000 dollars is 56 thousand dollars.

$8,000 is 8 thousand dollars.

The mean is the average. So the average, measured in thousands of dollars, is 56.

The standard deviation is $8,000. So, the standard deviation measured in thousands of dollars, is 8.

complete question

Let X denote the average starting salary for 2014 U.S. college graduates, measured in dollars. Suppose that the average annual salary is $56,000 dollars, with a standard deviation of 8,000. Find the mean and standard deviation when salary is measured in thousands of dollars.

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The likelihood that at least 1610 members of the sample agree is 0.3385.

Given,

sample std = sqrt[0.62 × 0.38/2577]

= 0.0096

sample proportion = 1610/2577

= 0.6240

z(0.6240) = (0.6240-0.62)/0.0096

= 0.4167

P(x >= 1610) = P(z >= 0.4167)

Then we get,

= 0.3385

Hence, The likelihood that at least 1610 members of the sample agree is 0.3385.

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The block's density can be calculated using the equation d=25g/8.4 cm.

Two things are equal, according to an equation.

For instance, 10 + 2 equals 6 + 6.

Simply put, this means that 10 plus 2 equals or is the same as 6 plus 6.

In an equation, the unknown could be present, as in 10 + x = 6 + 6.

So, find the block's volume first:

= Length * Width * Height

= 2 x 3 x 1.4

= 8.4 cm

Now that you know the volume and the mass, you can add them to the density formula, which is as follows:

= Mass / Volume

Assuming density is represented by the symbol b, the formula would be:

d = 25 g / 8.4 cm

Therefore, the block's density can be calculated using the equation d=25g/8.4 cm.

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Correct question:

A student is trying to identify the composition of a pure metal block by determining its density. The student records the mass of the sample to be 25.00 g. The rectangular block is 2.0 cm x 3.0 cm x 1.4 cm.

Which equation is necessary to determine the density sample?

Answer:2x3x4

Step-by-step explanation:

Dendrites first receive electrical signals from other neurons, after which an action potential is sent down the axon until it reaches the axon terminal. The vesicles then set the neurotransmitters in motion. Neurotransmitters will then travel to the synapse, where receptors will begin to transmit the signal.

A neurotransmitter is a signaling molecule that a neuron secretes to affect another cell across a synapse. The cell receiving the signal, which could be any major body part or target cell, could be another neuron or a gland or muscle cell. Neurotransmitters are chemical messengers required by your body to function. They are in charge of moving chemical signals (called "messages") from one neuron (nerve cell) to the next target cell. The next target cell might be another nerve cell, a muscle cell, or a gland.

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Answer:

41 mg magnesium

42 mg calcium

Step-by-step explanation:

87% of magnesium; 48 mg of magnesium

44% of calcium; 96 mg of calcium

87% × 48 mg magnesium = 0.87 × 48 mg magnesium = 41 mg magnesium

44% × 96 mg calcium = 0.44 × 96 mg calcium = 42 mg calcium

Answer: (x,y)=(12,8)

Step-by-step explanation:

The total score will be used to determine the student’s final admissions status.

I would like to build a program that calculates a student's score for a college admissions test. The program will be based on the coding requirements outlined by the college board, which include a list, an algorithm that uses sequencing, selection and iteration and a procedure that uses parameters.

The list will contain the student’s scores for each section of the admissions test. The algorithm will use sequencing to add the scores of each section together. Selection will then be used to determine whether the student has met the minimum requirements, and iteration will be used to keep track of any sections that were not completed. The procedure will be used to calculate the student’s total score, using parameters such as the number of sections completed and the scores for each section. The total score will be used to determine the student’s final admissions status.

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the final equations are.:

A relationship between a group of inputs and one output is referred to as a function. In plain English, a function is an association between inputs in which each input is connected to precisely one output. A domain, codomain, or range exists for every function. Typically, f(x), where x is the input, is used to represent a function.

We have the following function:

(x)  = 3x - 7

The function f translated 6 units up and 2 units rights:

6 units up:

y  = 3x - 7 + 6

2 units rigth:

y  = 3(x-2) - 7 + 6

y  = 3x - 6 - 7 + 6

Finally:

g(x)  = 3x - 7

The function f reflected about the y-axis and translated 7 units left:

reflected about the y-axis:

y = 3(-x) - 7

y = -3x - 7

translated 7 units left:

y = -3(x+7) - 7

y = -3x - 21 - 7

y = -3x -28

Finally:

g(x) = -3x - 28

The function f stretched vertically by a factor of 2 and translated up by 5 units:

stretched vertically by a factor:

y = 6x - 14

translated up by 5 units:

y = 6x - 14 + 5

y = 6x - 9

Finally:

g(x) = 6x - 9

The function f stretched vertically by a factor of 4 and translated up by 9 units:

stretched vertically by a factor of 4:

y = 12x - 28

translated up by 9 units:

y = 12x - 28 + 9

y = 12x - 19

Finally:

g(x) = 12x - 19

Thus, the final equations are.:

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According to the information provided, it should be noted that the 750 seniors in her school make up the population of interest, and the parameter of interest is the percentage of seniors who intend to attend the prom.

Given,

Additionally, a strictly random sample is required in order to create a confidence interval. Additionally, the sample size should be examined to see if it adequately represents the population.

Using the z critical of 1.645, a 90% confidence interval will be built. The sample proportion in this case will be:

= 36/50 = 0.72

Q = 1 - 0.72 = 0.28

n = 50

As a result, the standard error will be equal to 50 squared times the multiplication of 0.72 and 0.28. This amounts to 0.0635.

For a big sample randomly selected among 750 seniors, the interval on the context suggests that we are 90% confident that the fraction of those who desire to attend the prom falls within the interval.

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Answer:

allows companies to easily and quickly fulfill customer orders as soon as they come in

Step-by-step explanation:

Holding excess inventory will allow companies to easily and quickly fulfill customer orders as soon as they come in, all without having to worry about waiting on their stock to come in to ship an order out.