Which statement is true?
Please help

(a) Example question: "How often do you look at social media while doing schoolwork?

(b) Sofie can select a simple random sample of students by using a random number generator to assign a unique identification number to each student in the online high school.

(c) The sample for Sofie's research is the 32 completed surveys she received. These surveys represent the responses of a subset of the population. The population, in this case, refers to all the students at the online high school.

(d) If Sofie uses only the completed surveys, she can conclude that approximately 50% (16 out of 32) of the students who completed the survey reported using social media while doing schoolwork.

(a) Please select one of the following options: never, rarely, occasionally, frequently, or always."

(b) She can then use the random number generator again to select a specific number of students from the entire population of students, ensuring that each student has an equal chance of being selected. For example, if there are 500 students in total and Sofie wants a sample size of 50, she can generate 50 random numbers and select the corresponding students based on their identification numbers.

(d) However, it is important to note that this conclusion is specific to the sample of completed surveys and cannot be generalized to the entire population of high school students.

To make an inference about the percent of all high school students who use social media while doing schoolwork, Sofie would need a larger and more representative sample that covers a wider range of students in the online high school.

Additionally, she should consider potential biases in the sample, such as non-response bias if the students who chose not to complete the survey have different social media usage patterns compared to those who did respond.

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50%

since 98/2 = 49

Thats it

Nate had $3000 at the beginning.

The percentage is defined as a ratio expressed as a fraction of 100.

Let the original amount of money is P

Nate spent 12 % of his paycheck on car repairs

⇒ 12% of P = 12P/100

And he spent 25 % of the remainder on food.

⇒  0.25(88/100)P

He gave $ 1,320 of the remaining money to his parents

⇒ 1320  

If the usual price of the computer was $ 825 and the discount was 20 %

⇒ 825 - 0.20(825) = 660

P = 12P/100 + 0.25(88/100)P + 1320 + 660

P - 34P/100 = 1980

100P - 66P = 198000

P = 3000

Hence, Nate had $3000 at the beginning.

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The percentage error of the estimate is approximately -2.647%. Note that a negative value indicates an underestimation, while a positive value would indicate an overestimation.

To calculate the percentage error between the actual value and the estimate, you can use the following formula:

Percentage Error = ((Actual Value - Estimated Value) / Actual Value) * 100

Given:

Actual Value = 233,815 miles (average distance from the Earth's surface to the Moon's surface)

Estimated Value = The value that was used as the estimate

Let's assume the estimated value is 240,000 miles.

Using the formula, we can calculate the percentage error:

Percentage Error = ((233,815 - 240,000) / 233,815) * 100

               = (-6185 / 233,815) * 100

               ≈ -2.647%

The percentage error of the estimate is approximately -2.647%. Note that a negative value indicates an underestimation, while a positive value would indicate an overestimation.

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The polygon is a triangle with coordinates  (0,1),(6,1) and (3,6)

A triangle is a geometric shape that consists of three straight sides and three angles. It is a closed two-dimensional polygon with three vertices (or corners) and three edges (or sides) connecting them.

Given;

Base of triangle=6units

Area of triangle=15units²

1/2×b×h=15

1/2×6×h=15

h=15/3

h=5units

Two coordinates of the triangle are given as (0,1) and (6,1)

The third coordinate should have y coordinate=6(h=5)

and x coordinate should be midpoint of given two coordinates

x coordinate is  3

Third coordinate is (3,6)

Image is attached below.

Hence, the polygon is a triangle with coordinates  (0,1),(6,1) and (3,6).

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Answer:

0.5

Step-by-step explanation:

2x + 5 = 6

2x = 6 - 5

x = 6-5 / 2

x = 1/2

x = 0.5

Using system of linear equations he will require 20kg of 15% copper and 30kg of 70% copper to produce an alloy of 48% in 50kg

The system of linear equations is the set of two or more linear equations involving the same variables. Here, linear equations can be defined as the equations of the first order, i.e., the highest power of the variable is 1. Linear equations can have one variable, two variables, or three variables.

To solve this problem, we need to write a system of linear equations and find the equivalent amount of the metal required to make the desired amount of the alloy.

0.15x + 0.7y = 0.48(50) ..eq(i)

0.15x + 0.7y = 24 ...eq(i)

x + y = 50 ...eq(ii)

solving equation (i) and (ii)

x = 20, y = 30

He needs 20kg of 15% copper and 30kg of 70% copper to get 48% of 50kg of alloy.

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Answer:

355

Step-by-step explanation:

We have the sequence:

12, 19, 26, 33...

And we want to find the 50th term.

First, notice that this is an arithmetic sequence. This is because each subsequent term is 7 more than the previous term. So, this is increasing linearly.

Therefore, we can write an explicit formula for our sequence. The standard form for the explicit formula for an arithmetic sequence is:

\(x_n=a+d(n-1)\)

Where a is the initial term, d is the common difference, and n is the nth term.

We can see from our sequence that our initial term a is 12.

We also know that d is +7 because each term is 7 more than the previous term.

So, substitute 12 for a and 7 for d. This yields:

\(x_n=12+7(n-1)\)

To find the 50th term, let's substitute 50 for n:

\(x_{50}=12+7(50-1)\)

Evaluate. Subtract within the parentheses:

\(x_{50}=12+7(49)\)

Multiply:

\(x_{50}=12+343\)

Add:

\(x_{50}=355\)

So, the 50th term is 355.

And we're done!

Answer:

The pattern goes by adding 7 to the previous number to get the result.

12+7 = 19

19+7 = 26

26+7 = 33

The  

Use the formula  \(a_{n} = a_{1}+d(n-1)\)

The sequence = 7n-2

Therefore the 50th term

= 7(50)-2

= 350-2

= 348

The p-value can be found with the F-distribution table or statistical software. If the p-value is less than or equal to α, then answer is option (a),If the p-value is greater than α, then answer is option (b).

To determine the correct statistical decision based on the given F-statistic, F (3, 12) = 2.72, we need additional information such as the significance level (α) of the hypothesis test. The significance level is a predetermined threshold that is used to assess the statistical significance of the results.

The correct decision depends on whether the calculated p-value, which quantifies the strength of evidence against the null hypothesis, is less than or equal to the significance level (α).

To find the p-value, you would need the F-distribution table or statistical software.

Once you have the p-value, you can compare it to the significance level (α) to make a decision:

If the p-value is less than or equal to α, you would reject the null hypothesis, indicating a statistically significant mean difference.

If the p-value is greater than α, you would fail to reject the null hypothesis, suggesting that there is not a statistically significant mean difference.

Therefore, without the significance level or the p-value, it is not possible to determine the correct statistical decision.

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Answer:

470

Step-by-step explanation:

2(7×2+2×2+2×7)+2(12×7+7×7+12×7)-2(7×2)

= 64+434-28

= 470 cm²

Answer:

\(0 = log_{10} 1\)

Step-by-step explanation:

Base for the exponent and for the logarithm are the same!

10^0 is the exponential form where 10 is the base and 0 the exponent

\(log_{10} 1\) is the logarithm form where 10 is the base

To solve \(log_{10} 1 =\)   ask the question :

To what power should I raise the base 10 to obtain the number 1 ?

The answer to the power 0 therefore

\(log_{10} 1 = 0\)

\(1 = 10^{0} -is-the- exponential -form\\0 = log_{10} 1 - is -the -logarithmic -form\)

Answer:

So what it gives you Y you put that into the equation so since in your case Y=x-1 you put that into the equation and then find X

y=3 x=4

Step-by-step explanation:

Answer:

scatter plots are simply putting the data as a dot where it belongs based on in the situation the x-axis being balance in thousands and y axis for the change in savings account in hundreds.

Step-by-step explanation:

place a dot where each value given for each person x,y. it will look scattered.

just took the k12 test

Answer:

The third one because you just look at the x values of each dot. it isn't the fourth because domain does not include y values.

The operation that Amjed should perform to determine the relative frequency of a person over 30 years old who prefers to ride a mountain bike is given as follows:

2) Divide 25 by 462.

The parameters that are needed to calculate a probability are listed as follows:

Then the probability is calculated as the division of the number of desired outcomes by the number of total outcomes, hence it is the same as a relative frequency.

The total number of people is given as follows:

58 + 164 + 215 + 25 = 462.

Out of these people, 25 prefer mountain bike, hence the relative frequency is given as follows:

25/462.

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Answer:

12b=3b+75

Step-by-step explanation:

Answer:

12b=3b+75

Step by step equation

Answer:

3/8

Step-by-step explanation:

f(-2) = 254 , meaning if the company sells shirts -2 , they would make a profit of 254 dollars. This interpretation is true in the context of the problem.

f(12) = 266 , meaning if the company sells shirts 12 , they would make a profit of 266 dollars. This interpretation is true in the context of the problem.

f(17.5) = 270.25, meaning if the company sells shirts 17.5 , they would make a profit of 270.25 dollars. This interpretation is true in the context of the problem.

Based on the observations above, it is clear that an appropriate domain for the function is x ≥ - 2.

Functions and values given the function that represents elevation, in feet, of Jayden hikes expressed as:

f(x)=(x+2)²+250.

If the domain value of the function is -4, then;

f(-4)=(-4+2)²+250

f(-4) = 4 + 250

f(-4) = 254

f(-4) = 254 means If Jayden hikes 4 miles to the south, his elevation would be 254 feet. This interpretation is true in the context of the problem

If the domain value of the function is -4, then;

f(2)=(2+2)²+250

f(2) = 16 + 250

f(2) = 266

f(2) = 266 means If Jayden hikes 2 miles to the north, his elevation would be 266 feet. This interpretation is true in the context of the problem

If the domain value of the function is 2.5, then;

f(2.5)=(2.5+2)²+250

f(2.5) = 20.25 + 250

f(2.5) = 270.25

f(2.5) = 270.25 means If Jayden hikes 2.5 miles to the north, his elevation would be 270.25 feet. This interpretation is true in the context of the problem

Determining the domain

The domain exist for the value of (x+2)² ≥ 0

x + 2 ≥ 0

x ≥ - 2

Based on the observation above, it is clear that an appropriate domain of the function is x ≥ - 2

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Answer:

weight of large box = x kg=18.25kg

weight of small box =y kg=15.5kg

Step-by-step explanation:

weight of large box = x kg

weight of small box =y kg

2 large boxes and 3 small boxes has a total weight of 83 kilograms.

2x+3y=83--------- eq 1

4 large boxes and 8 small boxes has a total weight of 197 kilograms.

4x+8y =197 -------eq 2

multiply eq 1 with -2

-4x-6y =-166

now add both equations

-4x-6y=-166

4x+8y=197

______________________

     2y= 31

       y=15.5

substitute value of y=17 in eq 1

2x+3y=83

2x+3(15.5)=83

2x+46.5=83

2x =36.5

x=18.25

weight of large box = x kg=18.25kg

weight of small box =y kg=15.5kg

hope this helps :)

Answer:

Option (1)

Step-by-step explanation:

Planes ZWV (shaded side) and plane TUV (Top of the box) are the two sides of the given cube or box in the picture attached,

Common edge of the given planes is side SV.

Common edge or the line where two planes meet is the line of intersection of two planes.

Therefore, line SV will be the line of intersection of the given planes.

Option (1) will be he answer.

Component 3 must be started on day 197 to meet the delivery date of day 200.

To illustrate the backward schedule, we need to start from the delivery date (day 200) and work our way backward, taking into account the lead times and dependencies of each operation.

(a) Backward schedule:

Operation    |  Work Center  |  Time (hours)  |  Start Day

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

Final Assembly |   Work Center 1  |        1       |     200

Sub-assembly 1 |   Work Center 2  |        2       |     199

Component 4     |   Work Center 3  |        3       |     197

Component 2     |   Work Center 4  |        4       |     196

Component 3     |   Work Center 5  |        3       |     ????

(b) To identify when component 3 must be started to meet the delivery date, we need to consider its dependencies and lead times.

From the backward schedule, we see that component 3 is required for sub-assembly 1, which is scheduled to start on day 199. The time required for sub-assembly 1 is 2 hours, which means it should be completed by the end of day 199.

Since component 3 is needed for sub-assembly 1, we can conclude that component 3 must be started at least 2 hours before the start of sub-assembly 1. Therefore, component 3 should be started on day 199 - 2 = 197 to ensure it is completed and ready for sub-assembly 1.

Hence, component 3 must be started on day 197 to meet the delivery date of day 200.

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Answer:

0.001, 20, 1001, 2100

Step-by-step explanation:

The completed table based on the given pattern is as follows: Shape 1: 4 matchsticks, Shape 2: 7 matchsticks, Shape 3: 10 matchsticks, Shape 4: 13 matchsticks, Shape 5: 24 matchsticks, Shape 6: 82 matchsticks.

To complete the table based on the given pattern, we need to identify the rule that determines the number of matchsticks for each shape.

Looking at the provided information, we can observe that the first four shapes follow a consistent rule, while the last two shapes seem to deviate from that rule.

For the first four shapes:

Shape 1: 4 matchsticks

Shape 2: 7 matchsticks (Shape 1 + 3 matchsticks)

Shape 3: 10 matchsticks (Shape 2 + 3 matchsticks)

Shape 4: 13 matchsticks (Shape 3 + 3 matchsticks)

Based on this pattern, it appears that each shape adds three additional matchsticks compared to the previous shape.

Now, let's analyze the last two shapes:

Shape 6: 43 matchsticks

Shape 7: 82 matchsticks

From Shape 4 to Shape 6, there is an increase of 3 matchsticks as expected.

However, from Shape 6 to Shape 7, there is an unexpected increase of 39 matchsticks.

Since the given information does not provide a clear pattern or rule for the last two shapes, we cannot accurately determine the number of matchsticks for those shapes.

Therefore, we can complete the table as follows:

Shape 1: 4 matchsticks

Shape 2: 7 matchsticks

Shape 3: 10 matchsticks

Shape 4: 13 matchsticks

Shape 5: (Unknown)

Shape 6: (Unknown).

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Answer:

X is 102

Step-by-step explanation:

Hopefully this helped!

Answer: x=-7 y=7

Step-by-step explanation:

Answer:

for example lets say: (x+2)(x-2)(

x

4

+4

x

2

+16)

Rewrte the given terms as perfect cubes as follows and use the algebraic identity for the factorisation of difference of two cubes.

x

6

-64 =  

(

x

2

)

3

-  

(

4

)

3

=(

x

2

-4) (

x

4

+4

x

2

+16)

=(x+2)(x-2)(

x

4

+4

x

2

+16)

Step-by-step explanation:

do u think its correct?