An online music store is offering a promotion. When you spend $30 or more, you receive 3 songs for free. You Buy an album for $12 right and solve any quality that represents how much more money and we will spend to receive the three free songs

Answers

Answer 1

Answer:

need to spend $18 more in addition to $12

Step-by-step explanation:

Given: According to online music store, if you spend $30 or more, you receive 3 songs for free

To find: How much more money need to be spend in addition to $12 to receive three free songs

Solution:

Let x denotes amount to be spend in addition to $12 to receive three free songs

According to question,

\(x+12\geq 30\\x\geq 30-12\\x\geq 18\)


Related Questions


please all quesitons solve matlab
X 1 2 3 5 F(x) 3 6 19 99 Calculate f(4) using Newton's interpolating polynomials of a) 1st order b) 2nd order c) Create an algorithm in matlab 7 291 8 444

Answers

To solve these questions using MATLAB, we can utilize the "polyfit" and "polyval" functions for polynomial interpolation. Here's how you can calculate f(4) using Newton's interpolating polynomials for each order:

a) 1st order:

To calculate f(4) using a 1st order polynomial interpolation, we need two data points. In this case, we can use the points (3, 19) and (5, 99).

% Data points

X = [3, 5];

F = [19, 99];

% Perform 1st order polynomial interpolation

coefficients = polyfit(X, F, 1);

% Calculate f(4)

x = 4;

f_1st_order = polyval(coefficients, x);

The variable f_1st_order will store the value of f(4) calculated using the 1st order polynomial interpolation.

b) 2nd order:

To calculate f(4) using a 2nd order polynomial interpolation, we need three data points. In this case, we can use the points (2, 6), (3, 19), and (5, 99).

% Data points

X = [2, 3, 5];

F = [6, 19, 99];

% Perform 2nd order polynomial interpolation

coefficients = polyfit(X, F, 2);

% Calculate f(4)

x = 4;

f_2nd_order = polyval(coefficients, x);

The variable f_2nd_order will store the value of f(4) calculated using the 2nd order polynomial interpolation.

c) Algorithm:

To create an algorithm in MATLAB to calculate f(4) based on the provided data points (7, 291), (8, 444), we can follow a similar approach as before.

% Data points

X = [7, 8];

F = [291, 444];

% Perform polynomial interpolation

coefficients = polyfit(X, F, numel(X) - 1);

% Calculate f(4)

x = 4;

f_algorithm = polyval(coefficients, x);

The variable f_algorithm will store the value of f(4) calculated using the polynomial interpolation algorithm.

Note: Make sure to execute the code in MATLAB to obtain the desired results.

Learn more about polynomial here:

https://brainly.com/question/11536910

#SPJ11

Paul wants to buy a bicycle that costs $86.50. He has saved $60. He earns $5.30 an hour working after school and can save half of his total earnings. How many hours will he have to work to buy the bicycle?

Answers

He needs to work 10 hours

Answer:

10 hours

Step-by-step explanation:

86.50-60=26.50

5.30/2=2.65

2.65*10=25.50

so 10 hours of work to buy the bicycle

Find the values of x and y. Show all your work.

Find the values of x and y. Show all your work.

Answers

This is so cool bub

Two large high schools in a city (3000 students in each school) claim they have a higher rate of students who go on to graduate from a 4-year university. 57% of students from school A go on to graduate from a 4 year university and 61% from school B. A random sample of 75 students from school A and 80 from school B are selected and followed to determine if they graduate from a 4-year university.

a. Find the probability that difference in sample proportions is more than 6.

b. What is the probability that School A sample proportion is more than 5% higher than School B?

Answers

a. The probability that difference in sample proportions is more than 6% is 0.1056.

b. There is a 0.2677 probability that the sample proportion from School A is greater than 5% than that from School B.

a. We must first determine the standard error of variation between the two sample proportions in order to determine the probability that the difference in sample proportions is greater than 6:

SEp1-p2 = sqrt{ [p1(1-p1)/n1] + [p2(1-p2)/n2] }

where,

P1 = 57% of students are from school A.

p2 = 61% of students are from school B.

Sample sizes from schools A and B were 75 and 80, respectively.

SEp1-p2 = sqrt{ [(0.57)(0.43)/75] + [(0.61)(0.39)/80] }

= sqrt{ 0.00233 + 0.00240 }

= 0.0803

Now, we can find the Z-score as:

Z = (p1 - p2 - D) / SEp1-p2

where,

D = 6% = 0.06

Z = (0.57 - 0.61 - 0.06) / 0.0803

= -1.248

Using a standard normal distribution table, we can find the probability that Z < -1.248 is 0.1056.

Therefore, the probability that difference in sample proportions is more than 6% is 0.1056.

b. To find the probability that School A sample proportion is more than 5% higher than School B, we need to find the standard error of the difference between the two sample proportions:

SEp1-p2 = sqrt{ [p1(1-p1)/n1] + [p2(1-p2)/n2] }

where,

57% of the population in p1 is from school A.

61% of those in p2 are from school B.

75 were included in the sample from school A, while 80 were included in the sample from school B.

SEp1-p2 = sqrt{ [(0.57)(0.43)/75] + [(0.61)(0.39)/80] }

= sqrt{ 0.00233 + 0.00240 }

= 0.0803

Now, we can find the Z-score as:

Z = (p1 - p2 - D) / SEp1-p2

where,

D = 5% = 0.05

Z = (0.57 - 0.61 - 0.05) / 0.0803

= -0.621

We can get the probability that Z -0.621 is 0.2677 by using a standard normal distribution table.

Know more about Probability here:

https://brainly.com/question/32117953

#SPJ11

consider the following residual plot: (in image attached)

a) Calculate the sum of the residual values.

b) Does the residual plot support the claim that the data set displays a linear association between the variables?



(please! help is much appreciated!!!)​

consider the following residual plot: (in image attached)a) Calculate the sum of the residual values.b)

Answers

a) Sum of the residual values is 0.

b) No, the residual plot doesn't support the claim that the data set displays a linear association between the variables. In the plot, the residuals have an inconsistent spread and are not randomly distributed around the horizontal axis. Therefore, the plot suggests that a linear model is not the most suitable for this data set.

Residuals are the differences between the observed and predicted values of the response variable. The residual plot shows the distribution of these differences on the vertical axis against the fitted values (predicted values) on the horizontal axis. The sum of the residuals is always equal to zero if the linear model is fitted correctly.

The residual plot also provides a way to assess whether the assumptions of a linear model are met. The plot should display a random scatter of the residuals around the horizontal axis, indicating that the linear model is the most suitable for the data set. If the plot shows any patterns, such as a curvature or a funnel shape, it suggests that the linear model is not the most appropriate.

The residual plot in the question doesn't show a random scatter of the residuals. Instead, the plot shows a funnel shape with residuals that have an inconsistent spread, which indicates that the linear model is not the most suitable for this data set.

for such more questions on  values

https://brainly.com/question/843074

#SPJ8

whats the square root of 25/441

Answers

Answer:

0.01133786848

Step-by-step explanation:

Are polynomials closed under addition and subtraction?

Answers

Polynomials form a system like to that of integers hence they are closed under the operations of addition and subtraction.

Exponents of polynomials are whole numbers.

Hence the resultant exponents will be whole numbers , addition is closed for whole numbers. As a result, polynomials are closed under addition.

If an operation results in the production of another polynomial, the resulting polynomials will be closed.

The outcome of subtracting two polynomials is a polynomial. They are also closed under subtraction as a result.

The word polynomial is a Greek word. We can refer to a polynomial as having many terms because poly means many and nominal means terms. This article will teach us about polynomial expressions, polynomial types, polynomial degrees, and polynomial properties.

To learn more about polynomials

brainly.com/question/27287760

#SPJ4

a) Change 65 cm to mm.

Answers

Answer

650

explanation:

multiply the length value by 10

Find the value for x for which r ll s. Then find m<1 and m<2. m<1 = (60-2x)to the zero power m<2 = (71 - 3x)to the zero power. The value for x for which r || s is ?

Answers

Yes I need point lol Ik

Please help for a Brainly
please be accurate
What are the slope and y-intercept of the line 5x+2y=−22? To earn full credit, show your work

Answers

Answer:

Slope: -5/2

Y-Intercept: 0,-11

Step-by-step explanation:

The metric system is based on multiples of 100. Please select the best answer from the choices provided A.True B.False

Answers

Answer:

true

Step-by-step explanation:

i think

a pack of bottel of juice cost 9.09 how much does each bottle cost to the nearest cent

Answers

Answer:

909 cents

Step-by-step explanation:

There are 100 cents in 1 dollar

9.09 dollars * 100 cents = 909 cents

how many bottles are there in a pack?
Lets say there are 3
if there are 3 bottles in a pack
and
3 bottles cost 9.09
then 1 bottle would cost 9.09 divided by 3 therefore 1 bottle would cost 3.03

For i =√√1, what is the value of
(2+3i)(5-7i)?

Answers

result is 31+i in where 31 is real part and i is complex part as given i= √-1 and i²= -1

What is called complex number?

In mathematics complex number is an element which has two parts one is called real part and the remaining is termed as imaginary part. An example is 41+6i

here, 41 is real part, 6i is imaginary part

What is the system we use for complex number?

A real number cannot be added or subtracted with an imaginary number, but a real number can be multiplied or divided with an imaginary number.

We are given, (2+3i) (5-7i)

    at first, we expand it by removing parenthesis

2x5-2x7i+3ix5-3ix7i

10-14i+15i-21i²

now like term is added

10+i+21   as we are given i²= -1

    31+i

hence, we get 31+i

to learn more about complex number visit:

https://brainly.com/question/20566728

#SPJ1

2(-4 -2x) +5=25 please answer i well give u 19 points

Answers

Hope it helps with your work
2(-4 -2x) +5=25 please answer i well give u 19 points

Answer:

x=-7

Step-by-step explanation:

-8 - 4x+5=25

-3 - 4x=25

-4x=25+3

-4x=28

x=-7

Solve -3 1/2 = 1/2 x + 1/2 x + x.

Solve -3 1/2 = 1/2 x + 1/2 x + x.

Answers

Answer:if you are solving for x it would be x=-7/4 or -1 3/4

Step-by-step explanation:

Help, brainlest if best explained

Help, brainlest if best explained

Answers

The correct answer is a because when you divided by the negative 2 it flips the sign and then it is open because it doesn’t have a line underneath

Answer:

The correct answer is the first choice.

Step-by-step explanation:

Let's solve your inequality step-by-step.

−2x>6

Step 1: Divide both sides by -2.

\(\frac{-2x}{-2}\) > \(\frac{6}{-2}\)

x < −3     <== this equation matches the graph

In the diagram, the radius of the outer circle is 2x cm and the
radius of the inside circle is 6 cm. The area of the shaded region
is 364 pi cm

Enter your answer in the box.

In the diagram, the radius of the outer circle is 2x cm and theradius of the inside circle is 6 cm. The

Answers

825
Because when we did that we got

A six-sided die (with numbers 1 through 6) and an eight-sided die (with numbers 1 through 8) are rolled. What is the probability that exactly one 6 is rolled

Answers

The probability that exactly one 6 is rolled is 42.9%

Rolling a six-sided dice and an eight-sided die can yield a variety of results. The probability of rolling exactly one 6 out of the two dice is 6/14, or approximately 42.9%.

This is calculated by taking the total number of ways to roll one 6 (6) and dividing it by the total number of combinations possible (14). This means that there is a 42.9% chance of rolling one 6 when two dice are rolled.

The probability will be calculated by:

6/14

= 0.429

0.42× 100

=42.9

To learn more about probability, click here:

https://brainly.com/question/24756209

#SPJ4

Help me plzzz

Stefan bought 3 hamburgers and 4 fries for a total cost of $26.50.

Help me plzzzStefan bought 3 hamburgers and 4 fries for a total cost of $26.50.

Answers

Answer:

6.50

Step-by-step explanation:

Help me plzzzStefan bought 3 hamburgers and 4 fries for a total cost of $26.50.

Answer:

6.50

Step-by-step explanation:

the 7 one is too high to make sense and the rest are to low to make sense its a multiple choice question so it probably one mark for correct answer

the function when x = 3: b(x) = -2x-4

Answers

Answer: b(3)=-10

Step-by-step explanation:

Is this what you meant?

If country X has imports valued at $2.9 trillion, exports valued at $1.5 trillion, and GDP valued at $9.8 trillion, calculate the index of openness for country X. Round to two decimal places.

Answers

The index of openness is a metric that measures the ratio of a country's total trade (exports plus imports) to its gross domestic product (GDP).

It is a measure of how much a country is open to international trade. If country X has imports valued at $2.9 trillion, exports valued at $1.5 trillion, and GDP valued at $9.8 trillion, the index of openness for country X can be calculated as follows: Index of openness = (Imports + Exports) / GDP Substituting the values for country X.

We get: Index of openness = ($2.9 trillion + $1.5 trillion) / $9.8 trillion Index of openness = $4.4 trillion / $9.8 trillion Index of openness = 0.45Therefore, the index of openness for country X is 0.45 when rounded to two decimal places.

To know more about ratio visit:

https://brainly.com/question/32531170

#SPJ11

is -12, -10, -8, and -6 linear, exponential or neither

Answers

Answer:

Linear

Step-by-step explanation:

It goes up by 2 each time, so it would be linear.

Either I believe is the answer

Please help 25 points

Please help 25 points

Answers

Answer:

5400

Step-by-step explanation:

look at the photo it shows the problems that

Please help 25 points

in a group of 150 students 20 are freshmen 30 are sophomores 49 are juniors and 51 are senior if a student is randomly selected what is the probability that we select a sophomore before a freshmen

Answers

In a group of 150 students, 20 are freshmen 30 are sophomores 49 are juniors and 51 are seniors if a student is randomly selected the probability that we select a sophomore before freshmen is 2.69%.

So the given data we get from the question is as follows,

  Total number of students, N = 150

  A number of freshmen students, F = 20

  The number of sophomore students, S = 30

  Number of junior students, J = 49

  Number of senior students, R = 51

              We need to find the probability of selecting a sophomore student before a freshman student. The probability that a sophomore student is selected first,

             P(S) = Number of sophomore students/Total number of students

                    = S/N

   Probability that a freshman student is selected after a sophomore student,

          P(F|S) = Number of freshman students left/Total number of students left

                    = F/N-1

    Where N-1 is used because one student has already been selected.

     The probability that a sophomore student is selected first and then a freshman student is selected,

       P(S∩F) = P(S) × P(F|S)

                   = S/N × F/N-1

      Therefore, the probability of selecting a sophomore student before a freshman student is:

       P(S∩F) = S/N × F/N-1P(S∩F)

                   = 30/150 × 20/149P(S∩

                   = 0.0269 or 2.69%

      Therefore, the probability of selecting a sophomore student before a freshman student is 0.0269 or 2.69%.

To learn more about the probability of student visit: https://brainly.com/question/25839839

#SPJ11

The following data table represents the total cost of a monthly cell phone bill as a function of the number of minutes that the phone is used each month. Minutes 500 750 1,000 1,250 1,500 Total Monthly Cost (in dollars) $62 $77 $92 $107 $122Choose the correct linear model that represents the total monthly cost as a function of time. A y = 0.06 x + 500, B y = 16 x + 32,C y = 62 x + 16, D y = 0.06 x + 32 .

Answers

Answer:

ytyt

Step-by-step explanation:

tyt5667

delivered.
a. What is the constant rate of​ change? What does it​ represent?
b. What is the initial​ value? What might that​ represent?

Answers

The constant rate of change and initial value for the given graph are 40 and 20 respectively. the initial value might represent the fixed cost of the soil.

What is the slope of straight line?

The slope of a straight line is the tangent of the angle formed by it with the positive x axis as the reference. The negative slope indicates the rate of decrease while the positive shows the rate of increase.

The given problem can be solved as follows,

(a) The graph given is a straight line that passes through (0, 40) and (10, 240).

The constant rate of change is equivalent to the the slope of the line given as,

⇒ (240 - 40)/(10 - 0) = 20

(b) The initial value of the graph is given as the y-intercept of the line.

Which is given as 40.

It might represent the fixed cost.

Hence, the constant rate of change is given as 40 and the initial value is 20 which might represent the fixed cost.

To know more about slope click on,

https://brainly.com/question/3605446

#SPJ1

The missing graph is attached here.

delivered.a. What is the constant rate of change? What does it represent?b. What is the initial value?

Let X1, X2, ..., Xn be iid Poisson(). (a) Show that the most powerful test of size a of H:0= 2 vs : = H:0=1 rejects H, when = Xi < c for some constant c. (b) Find an approximate value of c if n=64 and a = 0.05. You may assume that the mean and variance of the Poisson (∅) are both ∅

Answers

The most powerful test of size α rejects H:0=2 when the sum of Poisson random variables is less than c. For n=64 and α=0.05, an approximate value of c is 109.484, using a normal approximation to the Poisson distribution.

(a) To show that the most powerful test of size α rejects H when X_i < c, we can use the Neyman-Pearson lemma. According to the lemma, the likelihood ratio test is the most powerful test.

The likelihood ratio is given by

λ(x) = (L(θ₁) / L(θ₀)) = \(e^{-n\theta_0}\) * (\(\theta_0^{\sum{x_i}}\)) / \(e^{-n\theta_1}\) * (\(\theta_1^{\sum{x_i}}\))

Taking the logarithm of the likelihood ratio, we have:

log(λ(x)) = -n(θ₀ - θ₁) + Σx_i(log(θ₀) - log(θ₁))

Since θ₀ = 2 and θ₁ = 1 in this case, the log-likelihood ratio becomes:

log(λ(x)) = -n + Σx_i(log(2) - log(1))

= -n + Σx_i(log(2))

To reject H:0 = 2, we need log(λ(x)) < c' for some constant c'. Therefore, if Σx_i < c, we reject H:0 = 2.

(b) Given n = 64 and α = 0.05, we need to find an approximate value of c such that the probability of Σx_i < c under the null hypothesis H:0 = 2 is approximately equal to 0.05.

Since X_i follows a Poisson distribution with mean θ, the sum ΣX_i follows a Poisson distribution with mean nθ. In this case, n = 64 and θ = 2.

To find the value of c, we can use a normal approximation to the Poisson distribution. Since nθ = 128, the mean of the Poisson distribution is 128.

Using the normal approximation, we can calculate the z-score corresponding to α = 0.05:

z = Z-score for α = 0.05 = -1.645 (from standard normal distribution table)

Now, we can find c such that the probability of ΣX_i < c is approximately 0.05

c = 128 + z * √(nθ) = 128 + (-1.645) * √(128 * 2)

≈ 128 - 18.516

≈ 109.484

Therefore, an approximate value of c for n = 64 and α = 0.05 is 109.484.

To know more about likelihood ratio test:

https://brainly.com/question/31539711

#SPJ4

Find the sum of the first 20 terms of the sequence below.
27, - 9, + 3, - 1, ...

Answers

The sum of the first 20 terms of the geometric sequence is 20.25.

What is a geometric sequence?

A geometric sequence is a sequence of numbers in which the ratio between consecutive terms is constant.

Example:

2, 4, 8, 16, 32 is a geometric sequence.

We have,

27, -9, 3, -1,.....

a = 27

Common ratio:

= -9/27 = -1/3

= 3/-9 = -1/3

The sum of the geometric sequence.

S(n) = a (1 - \(r^n\)) / (1 - r)

Now,

a = 27,

r = -1/3

S(20):

= 27 (1 - \((-1/3)^{20}\)) / (1 + 1/3)

= 27 (1 + 1/\(3^{20}\)) / (4/3)

[ (1 + 1/\(3^{20}\)) = 1 ]

= 27 x 3/4 x 1

= 20.25

Thus,

The sum of the geometric sequence is 20.25.

Learn more about geometric sequence here:

https://brainly.com/question/2321576

#SPJ1

What’s the anwer I do not understand this

Whats the anwer I do not understand this

Answers

Answer:

Step-by-step explanation:

So you have to get 2/3 of 128 grams which is about 85 grams. It says she has to mix 64 grams so she went over.

Hope this helps :)

What is the value of x in this diagram? (PLEASE HELP, GIVING 50 POINTS)

A) 52
B) 64
C) 128
D) 138

What is the value of x in this diagram? (PLEASE HELP, GIVING 50 POINTS) A) 52 B) 64 C) 128D) 138

Answers

Answer:

128degrees

Step-by-step explanation:

180-52=128

Other Questions
find the value of the question mark The radius of a circle is 2 centimeters. what is the diameter? give the exact answer in simplest form Which statement best describes why the value of the car is a function of the number of years since it was purchased?O Each car value, y, is associated with exactly one time, t.O Each time, t, is associated with exactly one car value, y.O The rate at which the car decreases in value is not constant.There is no time, t, at which the value of the car is 0. Let f(n) = n + 1. Find f(3), f(0), f(-3) Is f a one-to-one function from the set of integers to the set of integers? Is f an onto function from the set of integers to the set of integers? (Explain the reasons behind your answers). Which one of these shapes is not like the others? Explain what makes it different by representing each width and height pair with a ratio. I believe that shape C is different because when I look at its width and height, I notice. Which of these ordered pairs is not a point on the graph of 2x + 4y = 24? 3. In which of the following presentations would statistics be most appropriate?The History of Roman ArtHow to Improve Your Writing SkillsThe Constellations: Fact and FictionPoverty in America in the 20th and 21st Centuries Question 2 (1 point)Which of the following is not a theme of "Barbie-Q" ?O aObOcOdStereotypes of WomenBattle for ArchetypesMaterialismFeminism Help me in this question please dont put wrong answers! An octopus propels itself though the water by ejecting water though a funnel in its body. How does this demonstrate Newtons third law? y - 7 = 21 Your answer should be the value for the variable y. What are the 6 elements of satire? Adriana worked 38 hours last week. Her job pays $12 an hour. How much did she earn last week? i am equivalent to 5/6 . the sum of my numerator and my denominator is 44. the sum of the digits in my denominator is 6. what fraction am i? Find the missing angle measures: Find the length of the third side. If necessary, round to the nearest tenth.1520 Bill can mow the lawn in 2 hours, his younger brother Tom can mow it in 3 hours. If both brothers mow the lawn together, how long would it take? the focus on how mental activities help a person adapt to his or her environment is known as: imagine your organization is doing exit interviews and has promised confidentiality to all who respond. you are responsible for conducting the exit interviews. your supervisor has asked you to give her the name of each respondent so she can assess the information in conjunction with the person's supervisor. what obligation do corporate hr employees have to keep information confidential in such circumstances? what course of action will you take? why? after making your first post, engage with your colleagues about their ideas. ----- adapted from: judge, t. a. the pKa of MeC(O)CH2SPh is?