You sell bracelets for $2 each and necklaces for $3 each at a local flea market. You collect $95, selling a total of 37 jewelry items. How many of each type did you sell?

The value that represents the number of ways in which the expected classes are free to vary in the chi-square goodness-of-fit test is called the degrees of freedom (df).

It is equal to the number of categories minus one. The degrees of freedom provide a measure of the amount of information available in the sample to estimate the parameters of the distribution.

In a goodness-of-fit test, the degrees of freedom are calculated as the number of categories minus one, which represents the number of ways in which the expected classes are free to vary.

For example, if you are conducting a chi-square goodness-of-fit test to compare the distribution of a categorical variable with expected frequencies, you would have one degree of freedom for each category or class, with the exception of the last category.

The last category's frequency is determined by subtracting the sum of the observed frequencies for all other categories from the total sample size. This means that the last category is not free to vary independently, so it is not counted in the degrees of freedom calculation.

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The probability that if a person is chosen at random, he does NOT believes Marilyn Monroe had an affair with John is 0.60 or 60%

We can find the probability that a person does not believe Marilyn Monroe had an affair with John F Kennedy by dividing the number of people who responded "no" by the total number of people who responded to the survey:

Probability of "no" = Number of "no" responses / Total number of responses

Total number of responses = Number of "yes" responses + Number of "no" responses

Total number of responses = 110 + 163 = 273

Probability of "no" = 163 / 273

Simplifying the fraction, we get:

Probability of "no" = 0.5967 or approximately 0.60

So, the probability that if a person is chosen at random, he does not believe Marilyn Monroe had an affair with John F Kennedy is approximately 0.60, or 60%.

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According to the California Board of Accountancy's requirements for CPA license renewal, if the highest level of service provided during the two years prior to the renewal date was a compilation engagement, the CPA must complete 24 hours of continuing education in accounting and auditing subjects.

Here is the breakdown of the requirements for the Accounting and Auditing Education Requirement:

- If the highest level of service provided was an audit, review, or attestation engagement, the CPA must complete 40 hours of continuing education in accounting and auditing subjects.

- If the highest level of service provided was a compilation engagement, the CPA must complete 24 hours of continuing education in accounting and auditing subjects.

- If the highest level of service provided was preparation of financial statements, the CPA must complete 8 hours of continuing education in accounting and auditing subjects.

- If the CPA did not provide any of the above services, they are not required to complete any continuing education in accounting and auditing subjects.

In Brandon's case, since his highest level of service provided was a compilation engagement, he must complete 24 hours of continuing education in accounting and auditing subjects out of the total of 80 continuing education hours required.

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The mean absolute deviation from the given data set is 1.6

The mean absolute deviation measures how far the data points are on average from a center point. Mean, median, mode, or any other random figure can serve as the center point.

The mean is frequently used as the center point, In this situation,  The method for computing mean absolute deviation (MAD) is helpful, which represents the average of the absolute departure of the data points from the mean of the data set.

Mean = (1+5+5+6+8)/5

Mean = 25/5

Mean = 5

The distance of each value from the mean is as follows:

Value     distance from the mean 5

1               4

5              0

5              0

6              1

8              3

MAD = (4 + 0 + 0 + 1 + 3)/5

MAD = 8/5

MAD = 1.6

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Answer:

140 ° , because it is vertically opp to angle 4 and angle 4 is corresponding 8 .

The equation of hyperboloid of one sheet: [tex]\frac{x^{2} }{A^{2} } +\frac{y^{2} }{B^{2} } -\frac{z^{2} }{C^{2} } =1[/tex] which is used to calculate hyperboloid.

The most challenging quadric surface is probably the hyperboloid of a single sheet. For starters, it is puzzling since its equation is quite similar to that of a hyperboloid with two sheets. For information on how to tell them apart, see to the section on the two-sheeted hyperboloid. Its cross portions are also highly intricate equation.

Having said all of that, everyone who has watched The Simpsons, even for the first time, will recognize this form. One-sheet hyperboloids have a striking resemblance to Springfield Nuclear Power Plant cooling towers.

The cross sections of a straightforward one-sheeted hyperboloid with A = B = C = 1.

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Sarah's age now is 18.

Ratio is defined as the relationship between two quantities for which it tells how much one quantity is contained in the other.

Normally, the ratio of two quantities a and b is denoted as a : b.

Given in the question that,

The ratio of Sarah's age to her father's age now is 1:3.

Suppose that x is the age of Sarah now.

Then, from the information given, father's age now = 3x

After 6 years,

Sarah's age = x + 6

Father's age = 3x + 6.

Given that, In 6 years' time, the ratio becomes 2:5.

So, numerically,

(x + 6) / (3x + 6) = 2 / 5

Doing the cross multiplication, we get,

5 (x + 6) = 2 (3x + 6)

5x + 30 = 6x + 12

5x - 6x = 12 - 30

-x = -18 or x = 18

Hence now, age of Sarah is x = 18.

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The y- coordinate for the solution to the system of equations is 4

From the question, we have the following parameters that can be used in our computation:

8x−4y=−32,

2x+2y=4

Multiply the second equation by 4

So, we have the following representation

8x − 4y = −32

8x + 8y = 16

Subtract the equations

So, we have the following representation

12y = 48

Divide by 12

y = 4

Hence, the solution is y = 4

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The y-coordinate for the solution to the system of equations is equal to 4.

In Mathematics, a point of intersection can be defined as the location on a graph where two (2) lines intersect or cross each other, which is primarily represented as an ordered pair containing the point that corresponds to the x-coordinate (x-axis) and y-coordinate (y-axis) on a cartesian coordinate.

By critically observing the graph of the lines representing the given system of equations, we can reasonably and logically deduce that the correct solution set lies in Quadrant II and it is denoted by the point of intersection of both the x-coordinate (x-axis) and y-coordinate (y-axis), which is given by this ordered pair (-2, 4).

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Answer:

25%

Step-by-step explanation:

x + 0.25x = y

y - 0.25x = x

If the size of a circle increases by 25% and then decreases back down to it's original size it's going to be the same percentage 25%.

The equivalent to the statement the price decreased by 1/2% will be 0.995x. Thus, all options are incorrect.

The amount of any product is given as though it was a proportion of a hundred. The ratio can be expressed as a quarter of 100. The phrase % translates to one hundred percent. It is symbolized by the character '%'.

The percentage is given as,

Percentage (P) = [Final value - Initial value] / Initial value x 100

Let the price be 'x'. Then the equivalent to the statement the price decreased by 1/2% is given as,

⇒ (1 - 0.5 / 100) x

⇒ 0.995x

The equivalent to the statement the price decreased by 1/2% will be 0.995x. Thus, all options are incorrect.

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If there were 950 countries, we could expect celebrations from 10 countries.

Groundhog Day is a popular North American tradition celebrated on February 2 in the United States and Canada. It is based on the Pennsylvania Dutch superstition that if a groundhog emerges from its burrows on this day and sees its shadow due to clear weather, it will retreat to its burrow and winter will last six weeks longer.

In our calculation, as 2 out of 195 celebrate the day, we need know  how many celebrations we could expect if there were 950 countries.

950 / 195 = 4.87179487179 = 4.87. We will multiply 4.87 by 2 country giving us 9.74, approximately 10 countries.

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The table of values is

X |f(x)

0 | -45

2 | -35

4 | -25

6 | -15

From the question, we have the following parameters that can be used in our computation:

f(x) = -5|x - 9|

We have the x values to be

x = 0, 2 4 and 6

Substitute the known values in the above equation, so, we have the following representation

f(0) = -5|0 - 9| = -45

f(2) = -5|2 - 9| = -35

f(4) = -5|4 - 9| = -25

f(6) = -5|6 - 9| = -15

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8/19 or 42.1%

add all values up to a total, then find the percentage from that total.

8 + 2 + 1 + 3 + 5 = 19 balls total

8 tennis valls to 19 total.

8/19 or 42.1%

Answer: $3.32

Step-by-step explanation:

First arrange the given discrete values in ascending order.

$3.26, $3.28, $3.31, $3.31, $3.32, $3.34,$3.35, $3.38, $3.42

we will use the formula 1/2 x (n +1), where n is total number of discrete values which in this case is 9.

This formula doesn't give the answer of the second quartile, it tells which nth term in the arranged set will be the second quartile.

1/2 (9+1) = 5.

Now we will choose the 5th term of the ascending order set.

Second quartile is same as the median, that means you need the mid value.

Answer: 16

Step-by-step explanation:

6 ÷ 3 = 2

[tex]2^{3}[/tex] = 2 x 2 x 2

2 x 2 x 2 = 8

2 x 8 = 16

Answer:

(3c - 2)(c - 6)

Step-by-step explanation:

Quadratic Formula:

ax^2 + bx + c

a = 3 and c = 12

a * c --> 3 * 12 = 36

b --> -20

Two numbers that multiply to get 36 and added together get -20 are -18 and -2.

-18(-2) = 36

-18 + (-2) = -20

[tex]\frac{-18}{3c} = \frac{-6}{c}[/tex], [tex]\frac{-2}{3c}[/tex]

(c - 6)(3c - 2) = 3c^2 - 20c + 12

The required inequality, which represents the possible values for the number of apples and bananas purchased is 2a + 0.6b ≤10.

What is inequality?

Inequality can be defined as the relation of the expression containing the symbol of ( ≤, ≥, <, >) instead of the equal sign in an equation.

Here,

Let, the number of apples purchased, a, and the number of bananas purchased, b.

According to the question, Each apple costs $1.25 and each banana costs $0.60. London has a total of $10 to spend on apples and bananas.

So,

1.25a + 0.6b ≤10

Thus, the required inequality, that represents the possible values for the number of apples and bananas purchased is 1.25a + 0.6b ≤20.

Answer:

Step-by-step explanation:

n

PPM stands for "parts per million" and is a way of expressing small concentrations of substances in a larger mixture. To calculate PPM, divide the mass or volume of the substance by the total mass or volume of the mixture and multiply by one million.

To calculate PPM, you need to know the mass of the substance in question and the total mass of the mixture. Here are the steps to calculate PPM:

1. Determine the mass of the substance in question. For example, let's say you have a mixture that contains 0.5 grams of salt.

2. Determine the total mass of the mixture. For example, let's say the total mass of the mixture is 1000 grams.

3. Divide the mass of the substance by the total mass of the mixture. In this example, 0.5 grams / 1000 grams = 0.0005.

4. Multiply the result by 1,000,000 to get the PPM. In this example, 0.0005 x 1,000,000 = 500 PPM.

So, the concentration of salt in the mixture is 500 PPM. Remember to always use the same units of measurement for both the substance and the mixture when calculating PPM.

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The true statement is that the y intercept of function A is less than the y intercept of function B.

y intercept is the y coordinate of the point on the line where it touches the Y axis. The x coordinate will be 0 there.

Here we have two functions.

Function A is given in the graph and function B is given in the equation form.

From the graph, the y intercept of function A is the y coordinate of the point touching the Y axis.

Line touches the Y axis at the point (0, -3).

So y intercept of function A = -3.

The equation of function B is the slope intercept form.

In the slope intercept form, y = mx + c, c is the y intercept.

From the equation y = 1/2 x + 4, 4 is the y intercept.

So 4 > -3.

Hence the y intercept of B is greater than that of A.

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The equation of the line that is perpendicular to this line and passes through the point (5, −1) is y = (9/4)x - (49/4) and the equation of the line that is parallel to this line and passes through the point (5,−1) is y = (-4/9)x + (11/9).

An equation of a line is provided: -4x - 9y = 2

                                       -9y = 4x + 2

                                    y = (-4/9)x - 2/9

The slope-intercept form of the line is y = mx + c

So, the Slope of the line is -4/9

The slope of the perpendicular line is -1/(-4/9) = 9/4

Equation of line with slope 9/4 and containing the point (5, -1):

                                  y - (-1) = (9/4)(x - 5)

                                          y = (9/4)x - (49/4)

Parallel lines have the same slope, so the equation of the line with slope -4/9 and which contains the point (5, -1) is:

                              y - (-1) = (-4/9)(x - 5)

                               y = (-4/9)x + (11/9)

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The bearing of the bank from the swimming pool is 42 degrees south of west.

What is temperature ?

Temperature is a measure of how hot or cold something is. More specifically, it is a measure of the average kinetic energy of the particles that make up a substance. When the particles in a substance move faster, their kinetic energy increases, and the temperature of the substance goes up.

Temperature is usually measured in degrees Celsius (°C) or degrees Fahrenheit (°F), although in scientific contexts, the International System of Units (SI) unit of temperature is the kelvin (K). The Celsius scale sets the freezing point of water at 0°C and the boiling point at 100°C, while the Fahrenheit scale sets the freezing point of water at 32°F and the boiling point at 212°F. The kelvin scale sets the zero point at absolute zero (-273.15°C or -459.67°F), the theoretical temperature at which all molecular motion ceases.

According to given condition:

The bearing of the swimming pool from the bank is 138 degrees.

The bearing is the angle measured clockwise from the north direction.

Therefore, to find the bearing of the bank from the swimming pool, we need to add 180 degrees to the given bearing of 138 degrees and then subtract 360 degrees (a full circle) to get the bearing within the range of 0 to 360 degrees.

So,

Bearing of bank from swimming pool = (138 + 180 - 360) degrees = -42 degrees

Therefore, the bearing of the bank from the swimming pool is 42 degrees south of west.

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Answer:

Step-by-step explanation:

In Stata, you can include fixed effects in a regression by using the "xtreg" command with the "fe" option. The "xtreg" command is used to fit a linear regression model with panel data, and the "fe" option tells Stata to include fixed effects in the model.

Here's an example of how to run a fixed effects regression in Stata:

xtreg y x1 x2 x3, fe

In this example, "y" is the dependent variable, and "x1", "x2", and "x3" are the independent variables. The "fe" option tells Stata to include fixed effects for each individual in the panel data.

Note that the fixed effects in this example are time-invariant, meaning that they are constant for each individual over time. If you have time-varying fixed effects, you can include them in the regression using the "xtreg" command with the "vce(cluster id)" option, where "id" is the variable indicating the individual in the panel data.

Answer:

Step-by-step explanation:

None of the given equations support the fact that rational numbers are closed under addition, because they all involve irrational numbers or fractions, which are not necessarily rational.

Option (A) involves the irrational number √2.

Option (B) involves adding the irrational number √6 with its negative, which results in a rational number, but it doesn't prove that all additions of rational numbers are also rational.

Option (C) involves the perfect square 9, but the square root of a non-square integer is generally an irrational number.

Option (D) involves the addition of two rational numbers, which is a valid example of the closure property of rational numbers under addition.

Therefore, the correct answer is (D) 1/3+1/3=2/3.

Answer:

Option 2 Is Correct

Step-by-step explanation:

The following statements are true about the function and its graph:

The graph of the function is a parabola.

The graph contains the point (0, 0).

The graph does not contain the point (20, -8).

Option 1 is true because the function is a quadratic function, and all quadratic functions have a parabolic graph.

Option 2 is true because the y-intercept of the function is (0,0).

Option 3 is false because the function opens upwards

Step-by-step explanation:

x = number of quarters

y = number of dimes

x + y = 34

therefore, we can say right away

y = 34 - x

0.25x + 0.1y = 4

because a quarter is worth $0.25, and a dime is worth $0.10.

now we are using the first equation in the second :

0.25x + 0.1(34 - x) = 4

0.25x + 3.4 - 0.1x = 4

0.15x + 3.4 = 4

0.15x = 0.6

x = 0.6/0.15 = 4

y = 34 - x = 34 - 4 = 30

the solution is therefore (4, 30).

she has 4 quarters and 30 dimes.

Peng has 4 quarters and 30 dimes.

A set of simultaneous equations, also known as a system of equations or an equation system, is a finite set of equations for which common solutions are sought.

Given that, Peng has $4 in quarters and dimes. She has 34 coins.

we need to find the number of quarters and dimes, does Peng have,

Let x = number of quarters and y = number of dimes

Therefore, establishing the equations :-

x + y = 34

y = 34 - x...(i)

Since, a quarter is worth $0.25, and a dime is worth $0.10.

Therefore,

0.25x + 0.1y = 4.....(ii)

Therefore,

0.25x + 0.1(34 - x) = 4

0.25x + 3.4 - 0.1x = 4

0.15x + 3.4 = 4

0.15x = 0.6

x = 0.6/0.15

x = 4

Put x = 4 in the eq(i)

y = 34 - x = 34 - 4 = 30

y = 30

Hence, she has 4 quarters and 30 dimes.

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The equation AB=BC for [tex]A=BCB^{-1}[/tex].

The solution of AB = BC  for A, assuming that A,B and C are square matrices and B is invertible is

We have to solve the equation

AB = BC given that these all are square matrices and B is invertible.

Write the required Equation:

Multiply both sides by inverse of B

The multiplicative inverse of a matrix is the matrix that gives you the identity matrix when multiplied by the original matrix.

⇒[tex]ABB^{-1} =BCB^{-1}[/tex]

⇒[tex]AI=BCB^{-1}[/tex]

⇒[tex]A=BCB^{-1}[/tex]

Therefore, the solution of AB = BC is [tex]A=BCB^{-1}[/tex].

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The possible values for radius r and height h of the cone will be 2 and 2.1485 respectively.

What exactly is a cone?

A cone is a shape formed by connecting a single point known as the apex or vertex to all of the points of a circular base using a series of line segments (which does not contain the apex). The distance from the vertex to the base is the cone's height. The circular base's radius has been measured. The slant height is the length of the cone from the peak to any point along the base's perimeter. The height, radius of base, and slant height of the cone in the figure define it.

Volume of cone=1/3πr²h, where r=base radius and h=cone height

Curved surface area=πrL, where L is the slant height.

Now,

Given Volume of cone to hold popcorn=9 inch³

i.e. 1/3πr²h=9

r²h=9*3*7/22

r²h=8.5943

let r=2

then h=8.5943/4

h=2.1485

Hence,

            The possible values for radius r and height h of the cone will be 2 and 2.1485 respectively.

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Answer:

1) 108    2) 72    3) 11

Step-by-step explanation:

1) since the angle of PNM is the same as PLM, then we can simply add 42 and 66 to get 108 degrees

2)since the total angle in parallelogram is 360, we can take away the two angles we do know. Those are PLM and PNM which are 108 each.

360-108-108=144

with the last two corners having the same angle, the remaining degrees are distributed evenly giving us 144/2 = 72

3)since the length of LM and PN are the same then we get the equation

2d = 22 which gives us d = 11