Solve the system of linear equations

The price of the adult tickets will be $20.

The price of the child tickets will be $18

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

Given that;

Three adult and four children pay $132.

And, Two adult and three children pay $94.

Now,

Let The price of the adult tickets = x

The price of the child tickets = y

So, We can formulate;

Three adult and four children pay $132.

⇒ 3x + 4y = $132  ..(i)

And, Two adult and three children pay $94.

⇒ 2x + 3y = $94  ..(ii)

From (i),

⇒ 3x + 4y = $132

⇒ 3x = $132 - 4y

⇒ x = 44 - 4/3y

Substitute above value in equation (ii),

⇒ 2x + 3y = $94

⇒ 2(44 - 4/3y) + 3y = $94

⇒ 88 - 8/3y + 3y = $94

⇒ 1/3y = 94 - 88

⇒ 1/3y = 6

⇒ y = 18

And, From (ii),

⇒ 2x + 3y = $94

⇒ 2x + 3 × 18 = $94

⇒ 2x = 94 - 54

⇒ 2x = 40

⇒ x = 20

Thus, The price of the adult tickets = $20.

The price of the child tickets = $18

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Answer:

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

Solve each and combine:

The common interval is x > 3.

Step-by-step explanation:

Suppose that during its flight, the elevation e (in feet) of a certain airplane and its time t, in minutes since takeoff, are related by a linear equation. Consider the graph of this equation, with time represented on the horizontal axis and elevation on the vertical axis. For each situation, decide if the slope is positive, zero, or negative.

cruising: zero slope

descending: negative slope

ascending: positive slope

The value of the variable 'w' for the given equation 7 ( w + 7 )³ = 7(6³)  is equal to w = -1.

As given in the question,

Given equation is equal to :

7 ( w + 7 )³ = 7(6³)

Divide both the side of the equation by 7 we get,

⇒ 7 ( w + 7 )³ / 7 = 7(6³) /7

⇒( w + 7 )³ = (6³)  

Take cube root both the side of the equation we get,

⇒∛( w + 7 )³ = ∛(6³)  

⇒ w + 7 = 6

Now subtract 7 from both the side of the equation we get,

⇒w + 7 - 7 = 6 - 7

⇒ w = -1

Therefore, the value of the variable 'w' for the given equation is equal to w = -1.

The complete question is:

Solve this equation:

7 ( w + 7 )³ = 7(6³)

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The average wait time before a person can use the GottaGo toilet is three minutes. This is calculated by subtracting the average usage time (two minutes) from the average time between uses (five minutes).

1. Calculate the total time the toilet is occupied by multiplying the average usage time (two minutes) by the average time between uses (five minutes). This gives a total time of 10 minutes.

2. Calculate the total time the toilet is available by subtracting the total time the toilet is occupied (10 minutes) from the total time between uses (five minutes). This gives a total time of five minutes.

3. Calculate the fraction of time the toilet is occupied by dividing the total time the toilet is occupied (10 minutes) by the total time between uses (five minutes). This gives a fraction of two-fifths (2/5).

4. Convert the fraction to a percentage by multiplying the fraction by 100. This gives a percentage of 40%. Therefore, the GottaGo toilet is occupied 40% of the time.

Time occupied = 2 minutes * 5 minutes = 10 minutes

Time available = 5 minutes - 10 minutes = 5 minutes

Fraction of time occupied = 10 minutes / 5 minutes = 2/5

Percentage of time occupied = 2/5 * 100 = 40%

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Answer:

987

Step-by-step explanation:

Clue 4: There is no 2, 4, 5.

Clues 1 & 2: There is no 1.

7 must be on the right.

_ _ 7

Clue 5: 9 is in the first or second place

9 _ 7   or   _ 9 7

937 or 987 or 397  or 897

Try all 4 possibilities above through all 5 clues.

Only 987 works.

Answer: 987

The area of the forest would decrease to 1360 km²

Divide the value of an investment at the end of the period by its value at the beginning of that period. Raise the result to an exponent of one divided by the number of years. Subtract one from the subsequent result. Multiply by 100 to convert the answer into a percentage.

Given here, an area of 2100 km² and each year it decreases by 4.25%

in the first year, the area of the forest becomes  (2100 - 4.25/100 × 2100)                                            

                                                                               = 2010.75 km²

in the second year, the area becomes 2100 × (1-4.25/100)²

                                                                       = 1925.29 km²

similarly, in the tenth year, the area becomes 2100 ×  ( 1-  4.25/100)¹⁰

                                                                         =  1360 km²

Hence, the area of the forest reduces to  1360 km²

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Answer: 3

Step-by-step explanation:

The correct statement regarding bias in either distribution is given as follows:

R is biased, and W is unbiased.

We use the graphs showing the sampling distributions for the two different point estimates to identify bias.

Then the criteria to determine that there will be bias is given as follows:

From the graphs given at the end of the answer, we have that:

As the point estimate of estimator R is not at the center, it contains bias, and thus the fourth statement is correct.

The graphs are given by the image shown at the end of the answer.

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Answer:

Step-by-step explanation:

ax²+6x+c=0

disc=6²-4×a×c=36-4ac≥0,(∵ it has two real solutions.)

36-4ac≥0

36≥4ac

4ac≤36

ac≤9

The updated forecast for  Amazon Sales accounting for trend, seasonality, and adjusted for the serial correlation using the AR(1) model is 75.2432 billion dollars.

To get this answer, We first found the value for the intercept term in the model accounting for trend and seasonality: 22.67 billion dollars.  then added the estimated parameter values for the time period (2.538 billion dollars) and the indicator function for quarter 3 (-8.773 billion dollars). This gave me a total of 16.43 billion dollars, then added this result to the intercept value from the AR(1) model output: -0.0856 billion dollars. This gave me a total of 16.34 billion dollars. Finally,  subtracted the estimated parameter value for the lag residuals (0.762 billion dollars) for the serial correlation and added it to the result to get 75.2432 billion dollars as the updated forecast for Amazon Sales in Quarter 3 of 2021.

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Reflexive: No, two countries cannot have the same national language ,Symmetric: Yes, if one country has a common national language with another then the other must have a common national language with the former

a. The relationship between countries that "have a shared national language with"

Reflexive: No, two countries cannot have the same national language

Symmetric: Yes, if one country has a common national language with another then the other must have a common national language with the former

Antisymmetric: No, there can be multiple countries that share a common national language

Transitive: Yes, if Country A has a common national language with Country B and Country B has a common national language with Country C, then Country A has a common national language with Country C.

b. The relationship between individuals with computer science bachelor's degrees:

Reflexive: Yes, a person can have a bachelor's degree in computer science

Symmetric: Yes, if one person has a bachelor's degree in computer science, then the other must also have a bachelor's degree in computer science

Antisymmetric: Yes, if two people have a bachelor's degree in computer science then they are the same person

Transitive: No, a person who has a bachelor's degree in computer science does not necessarily have a bachelor's degree in any other subject.

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Answer:

440

Step-by-step explanation:

a=11

b=2

c=20

a*b*c=

11*2*20 = 440

This equation can be solved to find the vector x that is mapped to the zero vector - OD. x

The given matrix A is a 3x3 matrix, so the vector x is a 3-dimensional vector. To determine which vector x maps to the zero vector, 0, we can set up the equation:

Ax = 0

This equation can be solved to find the vector x that is mapped to the zero vector, 0. Solving the equation, we find that x = (0, 0, 0). Thus, the answer is OD. x = (0, 0, 0).

Matrix is a set of numbers arranged into rows and columns. It is commonly used in mathematics, science and engineering to represent a variety of data. Matrix can also be used to represent relationships between different variables.

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On solving the question we can say that - dependent variable = Daily minutes of secondhand smoke exposure independent variables = Race, Year of Education, and Gender Currently suffering with asthma

The variable that symbolizes the amount being changed in the experiment is known as the independent variable. The variable x is frequently utilized to symbolize the equation's independent variable.

part(B):

What the difference group indicates is how the dependent and independent variables are related.

dependent variable = Daily minutes of secondhand smoke exposure

independent variables = Race, Year of Education, and Gender

Currently suffering with asthma

part(C):

Given the information,

The appropriate response is,

What is the correlation between the number of minutes of daily secondhand smoke exposure and the presence of an asthma diagnosis?

part(D):

Given the information,

The appropriate response is,

What is the correlation between the number of minutes per day of secondhand smoke exposure and the presence of an asthma diagnosis

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Answer:

3 s

Step-by-step explanation:

Using this quadratic, max height will occur at t = -b/2a

       t = - 48 / (2*-16) = 1.5 seconds    to max height

           then another 1.5 seconds to fall to the ground

                for a total of 3 seconds.

Another way    d = 0    when it hits the ground

                           0 = -16 t^2 + 48 t + 0

                           0 = - 16t ( t +3 )       again shows t = 3s   (or 0 before it is launched)        

in a hypothesis test, two approaches are p-value and critical value.The null hypothesis should contain the research hypothesis.

a. The standard error of the mean is 0.14.

b. With a 95% probability, the margin of error is approximately 1.96.

c. If the sample mean is 9 hours, then the 95% confidence interval is approximately 8.74 to 10.20 hours.

d. Two approaches to drawing a conclusion in a hypothesis test are p-value and critical value.

e. The research hypothesis should be given as the null hypothesis as a general rule.

The standard error of the mean is 0.14. With a 95% probability, the margin of error is approximately 1.96. For a sample mean of 9 hours, the 95% confidence interval is 8.74 to 10.20 hours. When drawing a conclusion in a hypothesis test, two approaches are p-value and critical value. The null hypothesis should contain the research hypothesis.

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Answer:

None of the above.

No assumptions can be made because we do not know if the function is continuous or differentiable on those intervals.

Answer:

2.5 gallons

Step-by-step explanation:

If Jason's family drinks 2 1/2 gallons of milk in 4 days, then the amount of milk they drink per day is 2 1/2 / 4 = 5/8 gallons. Since 1 gallon is equal to 128 fluid ounces, 5/8 gallons is equal to 5/8 * 128 = 80 fluid ounces. Therefore, Jason's family drinks 80 fluid ounces of milk per day.

Note: To convert a mixed number to a decimal, we need to divide the numerator of the fraction by the denominator and add the result to the whole number. In this case, the mixed number is 2 1/2, which is equal to 2 + 1/2 = 2 + 0.5 = 2.5. This means that Jason's family drinks 2.5 gallons of milk per day.

Answer:

Step-by-step explanation:

i don't know i just need points

Answer:

20

Step-by-step explanation

25 / 5 = 5 (each part of the chapter)

5 * 4 = 20 (the number of pages he has read

Yes, there is something wrong with the function.

Here, two integer variables, num1, and num2 are taken by this function as arguments. Then it assigns the value of num1 to a newly declared integer variable, temp. It then assigns the value of temp to num2, and the value of num2 to num1, thus swapping the values of the two variables effectively.

Here, the problem with the function is that the function operates on copies of the original variables rather than the variables themselves.

The variables num1 and num2 are passed by value, which means that to swap the values of the original variables, the function should use pointers or pass the variables by reference.

For example

void swap (int* num1, int* num2) {

int temp = *num1;

*num1 = *num2;

*num2 = temp;

}

Here, the function to modify the original variables directly as the variables num1 and num2 are passed as pointers.

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Complete Question

The following function should swap the values contained in two integer variables, num1, and num2. What, if anything, is wrong with this function?

void swap(int num1, int num2)

{

int temp = num2;

num2 = num1;

num1 = temp;

}

The 95% confidence interval for the difference between the two proportions is (0.056, 0.164)

Here, we are given that from the sample information for people under 18-

n₁  =  500

x₁ =  180

⇒ p₁  =  180/ 500    

p₁  =  0.36    

then,  

q₁  =  1 -  p₁    

q₁ =  0.64

Similarly, from the sample information for people over 18, we have-

n₂  =  600

x₂  =  150

⇒ p₂  =  150 / 600  

p₂ =  0,25  

then,

q₂  =  1 - p₂  

q₂ =  1 - 0.25  

q₂ = 0,75

Now, we conduct a hypothesis test as follows-

Null hypothesis (H₀) ⇒  p₁  =  p₂

Alternative Hypothesis (Hₐ) ⇒ p₁  ≠  p₂

Confidence interval =  95 %    

⇒ significance level (α) = 5 %  

α  =  0.05  

and α/ 2  =  0.025  

⇒ z at 95% significance level = 1.96 (from z tables)

Now, we calculate z statistic-

z(s)  =  (p₁ - p₂) / EED

EED = √[(p₁*q₁)n₁  +  (p₂*q₂)/n₂]

EED = √[( 0.36*0.64)/500  +  (0.25*0.75)/600]

EED = √[0.00046  +  0.0003125]

EED = 0.028

and (p₁  -  p₂) = 0.36 - 0.25  

= 0.11

Therefore,

z(s)  =  0.11 / 0.028

z(s) = 3.93

we can see that  z(s) > 1.96

⇒ z(s) is in the rejection region for H₀

Thus, we reject H₀. We can´t support the idea of equals means

Now, CI at 95 %  = (p₁ - p₂) ±  z(c) * EED

CI = (0.11 ± 1.96 * 0.028)

CI = (0.11 ± 0.054)

CI =  (0.056, 0.164)

Thus, the 95% confidence interval for the difference between the two proportions is (0.056, 0.164)

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Your question was incomplete. Check for missing content below-

Q1. Let P, represent the proportion under and p, the proportion over the age of 18. The null hypothesis is:_____.

Q2. The 95% confidence interval for the difference between the two proportions is:____.

probability that among 5 randomly selected graduates, at least one finds a job in his or her chosen field within a year of graduation is 0.9947

Probability is the possibility or chance that something will happen. Probability = how many different paths there are to success/the total number of events that might occur. A coin flip, for instance, has a 50% chance of coming up heads since there is only one method to acquire a head and there are a total of two possible outcomes (a head or tail). P(heads) = 1/2 is the formula.

P(a student finds a job by themselves) is 0.65

P(a student does not find a job by themselves) is  0.35

Identify P(at least one of five obtains a job) as 1 - P. (none of 5 find a job)

= 1 - (0.35)^5

= 1 - 0.005252

= 0.9947

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Answer: false

Step-by-step explanation:

Im going to assume you are asking if 2x-6 is divisible by x+3

In this case, it is false.

x+3 * 2 = 2x+6

2x+6[tex]\neq[/tex]2x-6

The prediction hθ(x) = 0.7 means that the probability of the example having a value of y=1 is 0.7 (or 70%). Our estimate for P(y=0|x;θ) is 0.3. and Our estimate for P(y=1|x;θ) is 0.7.

The prediction hθ(x) = 0.7 means that the probability of the example having a value of y=1 is 0.7 (or 70%). This means that the probability of the example having a value of y=0 is 0.3 (or 30%). Therefore, our estimate for P(y=0|x;θ) is 0.3 and our estimate for P(y=1|x;θ) is 0.7.

The logistic regression classifier is a supervised learning algorithm used for binary classification. It is used to estimate the probability of an example belonging to one of two classes, typically 0 or 1. The output of the classifier, hθ(x), is a value between 0 and 1, which is interpreted as the probability of the example belonging to class 1. In the given case, the output of the classifier is hθ(x) = 0.7, which implies that the probability of the example belonging to class 1 is 0.7 (or 70%) and the probability of the example belonging to class 0 is 0.3 (or 30%). Thus, our estimate for P(y=0|x;θ) is 0.3 and our estimate for P(y=1|x;θ) is 0.7.

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Answer:

Wyzant

ALGEBRA WORD PROBLEM

Kieryn T. asked • 01/10/18

The length of a rectangle is 5 cm more than twice the width. The perimeter of the rectangle is 34 cm. Find the dimensions of the rectangle.

I am having trouble with this problem. I asked my parents and they didnt know what to do. I am stuck and i have looked through my notes and nothing has helped.

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Mikaila D. answered • 01/10/18

TUTOR 4.5 (8)

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The dimensions of the rectangle are two unknowns: The length "l" and the width "w"

The perimeter of a rectangle is found as P = 2*l + 2*w

We also know that the length is 5cm more than twice the width. l = 2*w + 5

These two equations gives us a system of linear equations.

P = 2*l + 2*w

l = 2*w + 5

We can use substitution to replace the "l" in the first equation with 2*w + 5

P = 2*(2*w + 5) + 2*w

P = 4*w + 10 + 2*w

P = 6*w + 10

We know that P = 34cm

34 = 6*w + 10

Subtract 10 from both sides

24 = 6 * w

Divide both sides by 6

4 = w

Now that we know the width, we can find the length by substituting 4 for "w" in the second equation.

l = 2*4 + 5

l = 8 + 5

l = 13

Answer:Model A and 19%

Step-by-step explanation:

I saw the explanation on study island

The correct model for the probability is given as follows:

Model B.

The probability that Mat will hit at least one home run in a single game is about 0.19 = 19%.

A probability is calculated by the division of the number of desired outcomes by the number of total outcomes.

Mat hits a home run once every ten times at bat, and gets exactly two times at bat in every game, hence the total number of outcomes is of:

10² = 100.

This is why Model B is the correct model, as it has two trials of 10 outcomes, and each trial has a 0.1 probability of success.

The probability that he hits no home runs is of:

0.9² = 0.81.

Hence the probability of hitting at least one home run is of:

1 - 0.81 = 0.19 = 19%.

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