A cell phone carrier charges a fixed monthly fee plus a constant rate for each minute used.
Part 1. In January, the total cost for 100 minutes was $47 while in February, the total cost for 350 minutes
was $52. The constant charge for each minute used is:
O 0.02
O 0.04
O 0.03

Answer:

x = -55/7, y = 34/7

Step-by-step explanation:

Solve the following system:

{-7 y - 7 = -41 | (equation 1)

-6 y + x = -37 | (equation 2)

Express the system in standard form:

{0 x - 7 y = -34 | (equation 1)

x - 6 y = -37 | (equation 2)

Swap equation 1 with equation 2:

{x - 6 y = -37 | (equation 1)

0 x - 7 y = -34 | (equation 2)

Multiply equation 2 by -1:

{x - 6 y = -37 | (equation 1)

0 x + 7 y = 34 | (equation 2)

Divide equation 2 by 7:

{x - 6 y = -37 | (equation 1)

0 x + y = 34/7 | (equation 2)

Add 6 × (equation 2) to equation 1:

{x + 0 y = -55/7 | (equation 1)

0 x + y = 34/7 | (equation 2)

Collect results:

Answer: {x = -55/7, y = 34/7

Answer:

The total number of planes landing at O’Hare Airport categorized by type.

Based on the information, we can infer that of the 250 adults surveyed, 190 wanted the park to be expanded and 60 did not want the park to be expanded.

To complete the table we must take into account the available information. In this case, they are only referring to the adults who wanted the park to be expanded:

According to the above, if we add these two values we would have a group of 190 adults who want the park to be expanded. So the number of adults who do not want the park to be expanded would be 60.

Finally, if there are 60 people who do not want the park to be expanded, we can infer that there may be 30 who are parents and 30 who are not parents.

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The sample space for rolling a fair eight-sided die is S = {1, 2, 3, 4, 5, 6, 7, 8}; the correct option is D

Probability is a way to gauge how likely something is to happen. According to the probability formula, the likelihood that an event will occur is equal to the proportion of positive outcomes to all outcomes. The probability that an event will occur P(E) is equal to the ratio of favorable outcomes to total outcomes. The likelihood of an event occurring might range from 0 to 1. A sample space is a set of potential results from a random experiment. The letter "S" is used to denote the sample space. Events are the subset of possible experiment results.

Given;

An eight-sided die,

The sample space=?

Now, when eight sides die is tossed there will be 8 sample spaces that are;

1, 2, 3, 4, 5, 6, 7, 8,

Hence, S = {1, 2, 3, 4, 5, 6, 7, 8}

Therefore, the probability sample space will be S = {1, 2, 3, 4, 5, 6, 7, 8}

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It is useful to determine the predictive accuracy of a choice model and hence option c is correct for confusion matrix

the misclassification error rate for the following xlminer confusion matrix and the accuracy value of the confusion matrix is 10.82% .

In the field of machine learning, specifically the problem of statistical classification (in unsupervised learning, it is typically referred to as a matching matrix), a confusion matrix, also known as an error matrix, is a specific table structure that enables visualizing the performance of an algorithm.

The literature describes both iterations of the matrix, where each row represents instances in an actual class and each column represents instances in a predicted class. Since it is straightforward to tell whether the system is combining two classes, the name was chosen (i.e. commonly mislabeling one as another).

accuracy is given by the formula :

Accuracy(%) = (true positive + true negative)/(positive + negative)

Here TP true positive =10

and TN true negative is 8.2

hence accuracy = (10+8.2) / (1+0)  %

Accuracy = 10.82%

Therefore the accuracy value of the confusion matrix is 10.82% .

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3 teragrams is equal to 3 million grams.

The formula to convert teragrams (tg) to grams (g) is: grams = teragrams x 1000000000000. For example, to convert 15 teragrams to grams, we multiply 15 by 1000000000000, which equals 1.5e+13 or 150000000000000 grams. To convert grams to teragrams, we reverse the formula by dividing grams by 1000000000000. For example, to convert 1500000000000 grams to teragrams, we divide 1500000000000 by 1000000000000, which equals 1.5 teragrams.1 tg (teragram) is equal to 1000000 g (grams).

To calculate how many grams are in a teragram, you can use the following formula:

Grams = Teragrams x 1,000,000

For example, let's say you have 3 teragrams. To find out how many grams this is, you would use the formula above:

Grams = 3 tg x 1,000,000

Grams = 3,000,000 g

In other words, 3 teragrams is equal to 3 million grams.

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Answer:

The volume of the cubical tank is 42 cm x 42 cm x 42 cm = 84,764 cm^3

If the tank is filled up to the height of its edge, it means that the water filled up to the height of 42cm, and the volume of the water filled is 42cm x 42cm x 42cm = 84,764 cm^3

The volume of 1 jug = 1.3 litres = 1300 cm^3

The total volume of water spilled = 2.45 litres = 2450 cm^3

The total volume of water that can be filled into jugs = total volume of water in tank - volume spilled = 84764 - 2450 = 82314 cm^3

If we divide the total volume of water that can be filled into jugs by the volume of 1 jug, we get 82314/1300 = 63.6

The maximum number of jugs that were fully filled is 63, as the fraction of 0.6 jugs is not possible.

Conducting a simulation can help to establish a cause and effect relationship between two variables is false regarding the use of simulation.

By enabling the testing of various scenarios or process improvements, a simulation is a modeling that replicates the operation of a current or proposed system. It provides evidence for decision-making. This can be integrated with virtual reality technologies for a more engaging experience.

Using simulation modeling, real-world issues can be safely and effectively solved. It provides a crucial analytical method that is easy to verify, interpret, and explain. Through providing precise insights into complex systems, simulation modeling offers beneficial solutions across sectors and disciplines.

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Answer:

1.5 is more than -1.5

Step-by-step explanation:

Positive numbers, like 1.5, are always greater than negative numbers, like -1.5

Answer: There are 120 ways to arrange the letters.

Step-by-step explanation:

The number of unique permutations will be 90720.

To find unique permutations for any word, one needs to break the word into letters,

In the present case the word has 9 letters, out of which 'P' and 'H' are the repeating letters.

The basic method of finding unique permutations for a word is calculating the total number of words and doing its factorial.

for e.g. in the word "WORD"

the number of unique permutations is 4! = 24 unique combinations.

But for the given question the number of unique permutations will be as follows:-

9!/2!*2!= 90720

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Answer: If x-1 is a factor of f(x) = 3x^3+kx-13, then f(x) can be written as (x-1)g(x) for some polynomial g(x). This means that f(1) = 0.

We can substitute x = 1 into f(x) to get f(1) = 3(1)^3 + k(1) - 13 = 3 + k - 13 = 0.

Therefore k - 10 = 0, so k = 10

So the value of k is 10.

Step-by-step explanation:

According to the given information in the question the mean is 16.71.

A data set's mean (average) is calculated by summing all of the numbers in the set, then reducing by the total number of values within the set. The median is the middle when a data set is sorted from least to greatest. The value that pops up most frequently in a data set is its mode.

The data set's values must first be summed together before being divided by the total number of values to determine the mean. List the data set's values in numerical order to get the median, then note the value that sits in the middle of a list.

mean = (20 + 17 + 19 + 22 + 18 + 17 + 5) / 7

mean = 16.71.

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Answer:

[tex]m=-\frac{1}{2}[/tex]

Step-by-step explanation:

[tex]\Delta y=-1,\,\Delta x=2\\\rightarrow \frac{\Delta y}{\Delta x}=\frac{-1}{2}=-\frac{1}{2}[/tex]

[tex]\Delta[/tex] represents change in both variables, so we calculate the slope this way.

Answer:

m=-1/2

Step-by-step explanation:

Use slope formula: [tex]m=\frac{y_{2} -y_{1}}{x_{2}-x_{1}}[/tex]

The cost of one muffin after taxes is $2.56. The solution has been obtained by using the arithmetic operations.

What are arithmetic operations?

For all the real numbers, there are four basic mathematical operations which are:

1. Addition(‘+’) wherein the sum of the numbers is obtained.

2. Subtraction(‘-’) wherein the difference of the numbers is obtained.

3. Multiplication(‘×’) wherein the product of the numbers is obtained.

4. Division(‘÷’) wherein the quotient of the numbers is obtained.

Let cost of one muffin after taxes be 'x'

We are given that there were six friends and each person ordered a small cup of coffee and a muffin.

The total for the order, including taxes, was $38.10

Also, the cost of a small coffee is $3.79 after taxes.

So, we get

⇒ 6(3.79 + x) = 38.10

⇒ 22.74 + 6x = 38.10

⇒ 6x = 15.36

⇒ x = $2.56

Hence, the cost of one muffin after taxes is $2.56.

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Answer:

  (3, 7)

Step-by-step explanation:

Given that points (-4,9), (-6,-5), and (1.-7) are three vertices of a parallelogram with segments connecting them in order, you want the point that is the fourth vertex.

The diagonals of a parallelogram bisect each other, which means they have the same midpoint:

  ((-4, 9) +(1, -7))/2 = ((-6, -5) +(x, y))/2

Multiplying by 2 and subtracting the point on the right side, we have ...

  (-4, 9) +(1, -7) -(-6, -5) = (x, y)

  (-4 +1 +6, 9 -7 +5) = (x, y) = (3, 7)

The fourth vertex is (3, 7).

__

Additional comment

In general three points can define three possible parallelograms. Here, the segments connecting the points are presumed to be the sides of the parallelogram, so reducing the number of possibilities to just one.

The fact that the diagonal midpoints are the same is useful for solving a variety of problems involving parallelograms.

The amount that you would have to pay in federal income tax if you claim 3 allowances would be:  $65.46

To calculate the amount you will pay in federal income tax using the percentage method of withholding, you will need to know the withholding percentage for your gross pay and the number of allowances you are claiming.

If you claim 3 allowances, each allowance is $80.80, and you gross pay for the week is $710, your taxable income is:

$710 - 3*$80.8 = $710 - $242.4 = $467.6

To find the amount of federal income tax you will pay, you will need to use the withholding percentage for your taxable income. You can find this information by consulting the IRS Circular E (Employer's Tax Guide) or by using an online withholding calculator.

If we use the IRS Circular E, we can find that if you are single and claim 3 allowances, the withholding percentage for a taxable income of $467.6 is 14%.

So the amount you will pay in federal income tax is:

$467.6 * 14% = $65.46

Therefore, you will pay $65.46 in federal income tax if you claim 3 allowances, and your gross pay for the week is $710.

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Answer:

(a) 45

(b) 10

(c) 70

Step-by-step explanation:

(a) The number of teachers who teach science but not humanities is:

Number who teach science - Number who teach both subjects

==> 60 - 15 = 45

(b) The number of teachers who teach humanities but not science is:

Number who teach humanities - Number who teach both subjects

==> 25 - 15 = 10

(c) The number who teach humanities or science is Number who teach humanities + number who teach science  - number who teach both

60 + 25 - 15 = 70

There are 30 teachers who teach neither humanities nor science = 100 - 70

Yes this sample(straightforward random sample)representative of the class's performance on the quiz

In mathematics, the middle value—which is determined by dividing the sum of all the values by the total number of values—is the average value in a set of numbers. To calculate the average of a set of data, add up all the values and divide the result by the total number of values. ​

A teacher randomly selects eight students from the class and averages their test scores to forecast how well her first period class will fare on their upcoming quiz. Is this sample indicative of how the class performed on the test?

Yes, since it is a straightforward random sample. ​

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Answer:

y < x + 6

Step-by-step explanation:

The line is broken so that mean that points on the line are not a solution.  The shaded part is below the line so that means that we would use the less than sign.

The slope is 1.  Rise over Run.  We go up 1 and right 1.  1/1 = 1.  The graph crossed the y axis at 6

To find the slope of the line given the points (-6,0) and (0,6), we can use the formula: m = (y2 - y1) / (x2 - x1).

m = (6 - 0) / (0 - (-6)) = 6/6 = 1

Using point-slope form, we can write the equation of the line as:

y - 0 = 1(x + 6)

y = x + 6

To get the inequality we just need to change the equation to the inequality by replacing the equal sign with the inequality sign.

So the linear inequality for the points (-6,0) and (0,6) is:

y > x + 6

The domain and range of the function is input value and output values respectively.

In math function is defined as  a correspondence from one value x of the first set A to another value y of the second set B.

Here we have to state the domain and range of the function.

AS per the definition of the function, we have identified that the domain of a function is the set of values that we are allowed to plug into our function. Which refers that this set is the x values in a function such as f(x).

And the term range of a function is defined as the set of values that the function assumes and which includes the set is the values that the function shoots out after we plug an x value in.

Complete Question:

State the domain and range of the function for the function f. And enter your answers using interval notation. if it is not a function, enter it in all blanks.

Domain: ____

Range: _____

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The measurement of ∠1 =  136° and ∠2 = x = 44°, using Vertically opposed angles.

Vertical angles are produced when two lines intersect at a point. They are always on an even playing field. Or, to put it another way, whenever two lines cross or intersect, four angles are formed. As we can see, two opposed angles are equal and are referred to as vertical angles.

They are also referred to as "vertically opposed angles" because of their position directly opposite one another.

∠x = 44

∠2 = x = 44

∠1 + ∠2 = 180

∠1 = 180 - 44 = 136°

Therefore, the angles are 36° and 144°.

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The average number of text messages that Quentin could have sent is given as follows:

At most 20.

The maximum number of text messages that can be sent on the entire plan is given as follows:

1000.

The amount sent by Sarina is given as follows:

400.

Hence the maximum amount of text messages that Quentin can send is given as follows:

1000 - 400 = 600.

Hence the maximum average over 30 days is given as follows:

600/30 = 20.

Hence the inequality is:

0 ≤ x ≤ 20.

(as the average number of messages cannot be negative).

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Answer:

6 divided by 2/3 = 9

Step-by-step explanation:

Steven cuts the 6 ft long rope by 2/3 to make 9 pieces and the answer is mathematically correct, via calulcator

Answer:

$18,000

rate of 5 %

Step-by-step explanation:

Answer:

7000 per year. 3000 interest

Step-by-step explanation:

Here is an example of how the code to rotate the cube could be implemented in Python:

class RooCube:

   def __init__(self):

       self.colors = ["w", "b", "o", "g", "y", "r"]

   def left(self):

       self.colors = [self.colors[1], self.colors[5], self.colors[2], self.colors[3], self.colors[0], self.colors[4]]

   def right(self):

       self.colors = [self.colors[4], self.colors[0], self.colors[2], self.colors[3], self.colors[5], self.colors[1]]

   def up(self):

       self.colors = [self.colors[3], self.colors[1], self.colors[0], self.colors[5], self.colors[4], self.colors[2]]

   def down(self):

       self.colors = [self.colors[2], self.colors[1], self.colors[5], self.colors[0], self.colors[4], self.colors[3]]

class RooRunner:

   def __init__(self):

       self.cube = RooCube()

   def rotate(self):

       direction = input("What direction would you like to rotate (left, right, up, down)? ")

       if direction == "left":

           self.cube.left()

       elif direction == "right":

           self.cube.right()

       elif direction == "up":

           self.cube

This would give us the required result.

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Assuming the exponential decay model applies, a similar calculator will cost $10.19 in the year 2023.

Question 2:

Part A:

The amount of caffiene that would still be in her system at bedtime is 28.36 mg

Part B:

The hours before she goes to sleep which she could drink a 16-oz coffee is 6.51 hours.

The average cost of a scientific calculator was $96.50 in 1970 and $22 in 2016. Using the exponential decay model, the cost of a similar calculator in 2023 would be $10.19.

Question 2:

Part A:

Reshanda was invited for coffee at 2:00 pm, and she normally goes to sleep at 10:00 pm. The half-life of caffeine is 5.5 hours. To determine how much caffeine would still be in her system at bedtime, we can use the formula:

C(t) = C0(1/2)^(t/T),

where C(t) is the amount of caffeine in her system at time t, C0 is the initial amount of caffeine (122 mg), t is the time in hours since she consumed the coffee, and T is the half-life of caffeine (5.5 hours).

At 10:00 pm, 8 hours after drinking the coffee, t = 8 hours. Plugging these values into the formula and solving for C(t), we get: C(8) = 122(1/2)^(8/5.5) = 28.36 mg

Part B:

Reshanda cannot sleep if she has 15 or more mg of caffeine in her system. We can use the formula from part A to solve for the time t when the caffeine level drops below 15 mg.

C(t) = 15, C0 = 122, T = 5.5

15 = 122(1/2)^(t/5.5)

then we can isolate t:

t = 5.5 * ln(122/15) = 6.51 hours

So, Reshanda could drink the coffee 6.51 hours before she goes to sleep.

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Based on the data displayed in the histogram, the percentage of students who study 2 or more hours for the midterm is 88%.

A histogram is a graphical representation of data that shows the distribution of a dataset. It is used to show the frequency or the relative frequency of different values within a set of data. It is a bar chart that displays the data in a continuous format, with the bars touching each other.

Based on the histogram, the number of students studying 2 or more hours for the exam are:

= 9 + 6 + 3 + 2 + 1 + 1

= 22 students

While the total number of students studying is :

= 3 + 9 + 6 + 3 + 2 + 1 + 1

= 25 students

The percentage of students study to or more hours can be determined by dividing the number of students studying 2 or more hours with the total number of students studying multiply by 100.

percentage = 22/25 x 100

percentage = 0.88 x 100

percentage = 88%

Therefore, 88% of students study to or more hours for the midterm.

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Answer: To find the distance the child travels, we can use the arc length formula: s = r * θ, where s is the arc length, r is the radius of the circle, and θ is the angle of rotation in radians. Since the merry-go-round has a radius of 3m and rotates through 120 degrees, we can convert the angle to radians by multiplying by pi/180.

120 degrees * pi/180 = 2pi/3 radians

Now we can plug in the values into the arc length formula:

s = r * θ

s = 3 * (2pi/3)

s = 2pi

The distance the child travels is 2pi meters, which is the circumference of the circle.

Step-by-step explanation:

Answer:

12

Step-by-step explanation:

√144 =12 answer

12 is right answer

Answer: B

Step-by-step explanation:

The pumpkin to green bean ratio is 2:1

That means x, the amount of green beans, has to be 1/2 the amount of pumpkin. Therefore the amount of pumkin is 2x.

The total amount of cans would be 3x, which is 114

3x = 114

114/3  = x

x = 38 cans of green beans