What is the value of the expression below when x
10 and y = 9?
9x + 9y

The expected value for a student to spend on lunch each day from the survey of 50 students is $5.18.

The expected value for a student to spend on lunch each day is derived from the survey of 50 students. This value is calculated by taking the total number of dollars spent by all of the surveyed students and dividing it by the total number of students surveyed. In this particular survey, the total number of dollars spent was $247, and the total number of students surveyed was 50. Dividing $247 by 50 gives us a value of $4.94. This value is then rounded up to the nearest cent to give us the expected value of $5.18. This expected value is the average amount of money that a student can expect to spend on lunch each day from the survey. It is important to note that this value is an estimate, as individual student spending habits may vary greatly.

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I think it's 4x? I'm not up to that level of math yet.

The value of x remains unchanged at 10 after evaluating the expression (y >= 10) || (x-- > 10).

To evaluate the expression (y >= 10) || (x-- > 10), let's break it down step by step:

Determine the value of y:

In this case, y is given as 10.

Evaluate the first condition (y >= 10):

Since y is equal to 10, the condition y >= 10 is true.

Evaluate the second condition (x-- > 10):

The value of x is initially 10. The expression x-- means that the value of x will be decremented by 1 after evaluating the condition. So, x-- > 10 becomes 10 > 10, which is false.

Combine the conditions with the logical OR operator (||):

The logical OR operator returns true if either of the conditions is true. In this case, the first condition is true, so the overall expression

(y >= 10) || (x-- > 10) evaluates to true.

Determine the value of x:

Since the expression evaluates to true, the value of x remains unchanged at 10.

Therefore, after evaluating the expression (y >= 10) || (x-- > 10) with

x=10 and

y=10,

the value of x remains unchanged at 10.

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The value of x remains unchanged at 10 after evaluating the expression (y >= 10) || (x-- > 10).

To evaluate the expression (y >= 10) || (x-- > 10), let's break it down step by step:

Determine the value of y:

In this case, y is given as 10.

Evaluate the first condition (y >= 10):

Since y is equal to 10, the condition y >= 10 is true.

Evaluate the second condition (x-- > 10):

The value of x is initially 10. The expression x-- means that the value of x will be decremented by 1 after evaluating the condition. So, x-- > 10 becomes 10 > 10, which is false.

Combine the conditions with the logical OR operator (||):

The logical OR operator returns true if either of the conditions is true. In this case, the first condition is true, so the overall expression.

(y >= 10) || (x-- > 10) evaluates to true.

Determine the value of x:

Since the expression evaluates to true, the value of x remains unchanged at 10.

Therefore, after evaluating the expression (y >= 10) || (x-- > 10) with

x=10 and

y=10,

the value of x remains unchanged at 10.

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Answer:

M=24

Step-by-step explanation:

72 - 48 = M

Answer:

Step-by-step explanation:

At the 0.10 level of significance, the evidence is insufficient to disprove the assertion that the proportion is 48%.

Based on the given conditions,

The analyst or researcher establishes a null hypothesis based on the research question or problem that they are trying to answer. Depending on the question, the null may be identified differently. For example, if the question is simply whether an effect exists (e.g., does X influence Y?) the null hypothesis could be H0: X = 0. If the question is instead, is X the same as Y, the H0 would be X = Y. If it is that the effect of X on Y is positive, H0 would be X > 0. If the resulting analysis shows an effect that is statistically significantly different from zero, the null can be rejected.

Let's start by outlining the research's null and alternate hypotheses;

A newsletter publisher believes that 60`% of their readers own a Rolls Royce.

This means that the null hypothesis is:

H0: p = 0.48

That is, that the proportion of their readers who own a Rolls Royce is of 0.48.

A testing firm believes this is inaccurate and performs a test to dispute the publisher's claim.

The alternate hypothesis is:

Ha: p ≠ 0.48

Now that he fails to disprove the null hypothesis based on the evidence, we will draw the following conclusion:

Therefore,

At the 0.10 level of significance, the evidence is insufficient to disprove the assertion that the proportion is 48%.

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Tthe inequality that describes this graph is y ≤ 1/3x - 4/3

The graph that completes the question is added as an attachment

From the attached graph, we have the following points

(0, -1.3) and (3, -0.3)

The slope is calculated as:

m = (y2 - y1)/(x2 - x1)

Substitute the known values in the above equation

m = (-0.3 + 1.3)/(3 - 0)

Evaluate

m = 1/3

The equation is then calculated as:

y = m(x - x1) + y1

This gives

y = 1/3(x - 0) - 1.3

Evaluate

y = 1/3x - 4/3

From the graph, we have the following highlights:

The first highlight above implies, the inequality can be any of ≥ and ≤

While the second highlight above implies, the inequality is ≤

Hence, the inequality that describes this graph is y ≤ 1/3x - 4/3

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This method of randomization, where a single coin flip is used to assign all subjects in a particular age group to the same treatment group, is not a good way to randomly assign subjects to treatment groups.

Here's why:

Lack of true randomization: True randomization ensures that each individual subject has an equal and independent chance of being assigned to either the treatment or control group. In this method, the randomization is based solely on the outcome of a single coin flip. As a result, the assignment of subjects is not truly random and can lead to biased or unrepresentative treatment group compositions.

Potential for confounding variables: By using age as the sole criterion for assignment, other potential confounding variables related to age (such as health status, medical conditions, or lifestyle factors) are not taken into account. This can introduce bias into the treatment groups, making it difficult to isolate the true effects of the treatment being studied.

Lack of balance in sample size: Since the sample size of adults under 65 and those 65 and over is equal (50 subjects each), this method does not ensure equal representation of each age group in both the treatment and control groups. As a result, the groups may not be balanced, leading to potential differences in baseline characteristics that could affect the outcome.

This method of randomization using a single coin flip to assign subjects based solely on age does not guarantee true randomization, introduces potential biases, and does not ensure balance between treatment and control groups. It is important to use more rigorous randomization techniques, such as random number generation or stratified randomization, to ensure unbiased and representative assignment of subjects to treatment groups in order to draw valid conclusions from the study.

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Answer:

Well what's half of 55?

Step-by-step explanation:

just find what 2 number make 55. Well half of 55 if 27.5 so then you put that into your chart and that should help you move along the rest! Hope this helps!

Answer:7^8/7^2, (7^2)^3

Step-by-step explanation:

Answer:

Rate of change = 150%

Rate of change = 100%

Rate of change = 100%

Step-by-step explanation:

Find:

Rate of change

x=2 and x=5

x=3 and x=6

x=2 and x=4

Rate of change = [(5-2)/2]100

Rate of change = 150%

Rate of change = [(6-3)/3]100

Rate of change = 100%

Rate of change = [(4-2)/2]100

Rate of change = 100%

Answer:

2 4 8         next : increases

Step-by-step explanation:

Answer:

minimum

Step-by-step explanation:

52,  because 52 is a multiple of 13 (13*4 = 52)

Answer:

The answer is 52

Answer:

9

Step-by-step explanation:

17 + 8x = 3x + 62​

-3x +8x = -17 +62

5x= 45

x= 9

Answer:

The answer to your problem is, 161

Step-by-step explanation:

(9+8+6) = 23

7 x 23 =

161

Thus the answer is 161

Answer:

I think it is A, but you said you know that it is not a so I say D

Answer:

31

Step-by-step explanation:

I would use my fingers mostly.

But, I just do it normally. I pretend I'm using a sheet of paper then I write on it for the equation.

903.6 divided by 29.1

Then I estimate it because I know that 29.1 can go into 903.6 about 31 times. Then I multiply 31 and 29.1 and i get around 903.6.

I hope this helps. I'm sorry if you get this wrong.

Answer:

30

Step-by-step explanation:

Round 903.6 to 900 and 29.1 to 30

So 900/30

= 30

This would be my estimated answer

Also 30^2

= 900

Step-by-step explanation:

The volume of a solid after dilation is given by the cube of the scale factor applied to its original volume. Therefore, if the original solid has a volume of 8 cubic units and is dilated by a scale factor of k, the volume of the image can be found as follows:

Volume of image = (scale factor)^3 x volume of original solid

Substituting the given values, we get:

For k = 2:

Volume of image = (2)^3 x 8 = 64 cubic units

For k = 0.5:

Volume of image = (0.5)^3 x 8 = 1 cubic unit

For k = 1:

Volume of image = (1)^3 x 8 = 8 cubic units

Therefore, the volume of the image after dilation depends on the cube of the scale factor applied to the original solid. If the scale factor is greater than 1, the volume of the image will be larger than the original volume, while if the scale factor is less than 1, the volume of the image will be smaller than the original volume. If the scale factor is equal to 1, the volume of the image will be the same as the original volume.

Answer:

\(x>-1\)

Step-by-step explanation:

I used guess and check - anything above -1 works!

Answer:

x>-1

Explanation:

4x-2>-6

4x>-6+2

4x>-4

4x>-4

=x>-1

With a test statistic of z = 1.985 (or z = -1.985) and a p-value of 0.047, we need to determine if the confidence interval for the difference in the proportion of male and female legal abalones includes zero.

To determine if the confidence interval includes zero, we need to consider the significance level (α) of the hypothesis test. If α is less than the p-value, we reject the null hypothesis and conclude that there is evidence against the claim that the proportions are equal.

In this case, the p-value is 0.047, which is less than the conventional significance level of 0.05. Therefore, we reject the null hypothesis and conclude that there is evidence against the claim that the proportions of male and female legal abalones are equal.

Since the test is significant and we have evidence against the null hypothesis, it follows that the 95% confidence interval for the difference of proportions in the population will not include zero. This means there is a statistically significant difference between the proportions of male and female legal abalone.

Therefore, the correct statement is: No, since the p-value is less than 0.05, the test is significant and we have evidence against the null hypothesis claim that the proportions are equal, the 95% confidence interval for the difference of proportions in the population will not include zero.

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Answer:

(6.5, 3.5)

Step-by-step explanation:

Given points are (8, 4) & (5, 3)

\(\therefore x_1= 8,\: y_1= 4,\: \:x_2=5,\:y_2=3\)

\(mid \: point \: formula = \bigg( \frac{ x_{1} + x_{2}}{2},\: \: \frac{ y_{1} + y_{2}}{2} \bigg) \\ \\ mid \: point \: = \bigg( \frac{ 8 + 5}{2} ,\: \: \frac{ 4 + 3}{2} \bigg) \\ \\ = \bigg( \frac{ 13}{2} ,\: \: \frac{ 7}{2} \bigg) \\ \\ = ( 6.5, \: \: 3.5) \\ \\ \)

Answer:

the value of x in terms of b is bx=-13

the value of x when b is 3 is x=-1

Answer:

\(f(x)=2x-6\)

\(f^{-1}(x)=\dfrac{x+6}{2}\)

Step-by-step explanation:

Using slope-intercept form of linear function:  \(y = mx + b\)

\(\implies f(x)=mx+b\)

\(\textsf{if} \ \ f(1) = -4\)

\(\implies m + b=-4\)

\(\implies b = -4-m\)

Find inverse of slope-intercept form:

swap x and y:  \(x = my + b\)

Make y the subject:

\(\implies x - b = my\)

\(\implies y = \dfrac{x-b}{m}\)

\(\implies f^{-1}(x) = \dfrac{x-b}{m}\)

\(\textsf{if} \ \ f^{-1}(0) = 3\)

\(\implies \dfrac{0-b}{m}=3\)

\(\implies b=-3m\)

\(\textsf{equation 1:} \ \ b = -4-m\)

\(\textsf{equation 2:} \ \ b=-3m\)

Equate the equations and solve for \(m\):

\(\implies b=b\)

\(\implies -4-m=-3m\)

\(\implies -4=-2m\)

\(\implies m=2\)

Substitute found value for \(m\) into one of the equations and solve for \(b\):

\(b = -4-2=-6\)

Substitute found values of \(m\) and \(b\) into equations for \(f(x)\) and \(f^{-1}(x)\):

\(f(x)=2x-6\)

\(f^{-1}(x)=\dfrac{x+6}{2}\)

The expression that can be used to find the percent of change between the gym's membership in 2012 and the current membership is ((Current Value - Initial Value) / Initial Value) \(\times\) 100.

To find the percent of change between the gym's membership in 2012 and the current membership, we can use the following expression:

Percent of change = ((Current Value - Initial Value) / Initial Value) \(\times\) 100

In this case, the initial value is 9,300 (membership in 2012), and the current value is 2,800 (current membership).

Substituting these values into the expression, we get:

Percent of change = ((2,800 - 9,300) / 9,300) \(\times\)100

Simplifying the expression further, we have:

Percent of change = (-6,500 / 9,300) \(\times\) 100

Therefore, the expression that can be used to find the percent of change between the gym's membership in 2012 and the current membership is ((Current Value - Initial Value) / Initial Value) \(\times\)100. This formula calculates the relative difference between the initial and current values and expresses it as a percentage.

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Answer:

I think the answer is A

1,2

The two correct statements are (b) and (e). The train travels 1 7/11 miles per minute or 98 2/11 miles per hour. The result is obtained by using the equation of the speed.

The equation of speed can be expressed as

Speed = S/t

Where

The train travels 3/2 miles in 11/12 of a minute. It means that

The speed of the train is

= S/t

= (3/2) miles / (11/12) minutes

= (3×12) / (2×11)

= 18/11

= 1 7/11 miles per minute

If we convert it to miles per hour, it would be

= (18/11) × (60/1)

= 1080/11

= 98 2/11 miles per hour

We can also say the speed as the unit rate.

Hence, the two correct statements in options are (b) The unit rate is 1 7/11 miles per minute, and (e) The train travels 98 2/11 miles per hour.

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