he classical dichotomy is the separation of real and nominal variables. the following questions test your understanding of this distinction. taia divides all of her income between spending on digital movie rentals and americanos. in 2016, she earned an hourly wage of $28.00, the price of a digital movie rental was $7.00, and the price of a americano was $4.00. which of the following give the real value of a variable? check all that apply.

Answer: 10x - 1 and 20x - 12

Step-by-step explanation:

perimeter is defined as the distance around a figure:

as such, the perimeter of this triangle is: (2x -3) + (3x + 5) + (5x - 3)

which simplifies to 10x - 1

Area is a little bit tougher. the area of a triangle is defined as 0.5 base x height.

both are given, so we simply plug in: 0.5 x (5x-3) x 8 = 4(5x-3) = 20x - 12

And thats it!

the Perimeter is 10x - 1 units.

the Area is 20x - 12 square units.

From the graph, the complex number with the greatest modulus is z1

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

The complex numbers z1, z2, z3 and z4

The general rule of modulus of complex numbers is that

The complex number that has the greatest modulus is the complex number that is at the farthest distance from the origin

Using the above as a guide, we have the following:

From the graph, the complex number that is at the farthest distance from the origin is the complex number z1

Hence, the complex number with the greatest modulus is z1

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The best measure of variability for the data and the player which was more consistent include the following: B. Player B is the most consistent, with a range of 9.

In Mathematics and Statistics, interquartile range (IQR) of a data set and it is typically calculated as the difference between the first quartile (Q₁) and third quartile (Q₃):

Interquartile range (IQR) of Player A = Q₃ - Q₁

Interquartile range (IQR) of Player A = 4 - 1.5

Interquartile range (IQR) of Player A = 2.5.

Range of Player A = Highest number - Lowest number

Range of Player A = 8 - 1

Range of Player A = 7

Interquartile range (IQR) of Player B = Q₃ - Q₁

Interquartile range (IQR) of Player B = 5 - 1.5

Interquartile range (IQR) of Player B = 4.5.

Range of Player B = Highest number - Lowest number

Range of Player B = 10 - 1

Range of Player B = 9

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Answer:

The mean weight of six boys as per the incorrect data is 59.1667 kilograms.

The actual mean weight of the boy's group is 58.5 kilograms.

To find the mean weight of the six boys as per the incorrect data, we add up all the weights and divide by 6:

(55 + 58 + 57 + 60 + 59 + 65)/6 = 354/6 = 59.1667 kilograms

To find the actual mean weight of the boy's group, we add up the weights of the first five boys and the corrected weight of the sixth boy, and divide by 6:

(55 + 58 + 57 + 60 + 59 + 56)/6 = 345/6 = 58.5 kilograms

Step-by-step explanation:

The cumulative distribution function of X is F(x) = (x-0)/(5.2-0) = x/5.2. The value of x such that F(x) = 0.75 is the upper quartile. Solving for x, we get x = 3.9 seconds.

a. The mean of this distribution is (0+5.2)/2 = 2.6 seconds.

b. The standard deviation is (5.2-0)/sqrt(12) = 1.5 seconds.

c. The probability that wave will crash onto the beach exactly 3.1 seconds after the person arrives is P(x = 3.1) = 1/5.2 = 0.1923.

d. The probability that the wave will crash onto the beach between 0.8 and 4.2 seconds after the person arrives is P(0.8 < x < 4.2) = (4.2-0.8)/(5.2-0) = 0.7692.

e. The probability that the wave will crash onto the beach before 2.34 seconds after the person arrives is P(x < 2.34) = 2.34/5.2 = 0.45.

f. Suppose that the person has already been standing at the shoreline for 0.5 seconds without a wave crashing in. The time until the wave crashes onto the shoreline follows a uniform distribution from 0.5 to 5.2 seconds. The probability that it will take between 2.7 and 3.9 seconds for the wave to crash onto the shoreline is P(2.7 < x < 3.9) = (3.9-2.7)/(5.2-0.5) = 0.204.

g. 12% of the time a person will wait at least how long before the wave crashes in? Let X be the time until the wave crashes onto the shoreline. The probability that a person will wait at least X seconds is P(X > x) = (5.2-x)/5.2. We want to find the value of x such that P(X > x) = 0.12. Solving for x, we get x = 4.576 seconds.

h. The upper quartile is the 75th percentile of the distribution. Let X be the time until the wave crashes onto the shoreline. The cumulative distribution function of X is F(x) = (x-0)/(5.2-0) = x/5.2. The value of x such that F(x) = 0.75 is the upper quartile. Solving for x, we get x = 3.9 seconds.

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The surface area of the regular pyramid is 178.3 mm².

Here, we need to find the surface area of the regular pyramid.

This regular pyramid consists of three equal triangular faces.

The base of the triangle is 10 mm and height is 9 mm.

Using formula of the area of triangle, the area of a triangle would be,

A = (1/2) × base × height

A = (1/2) × 10 × 9

A = 45 sq. mm.

So, the surface area of the three sides would be,

B = 3A

B = 3 × 45

B = 135 sq. mm.

Here, the area of the base is 43.3 sq.mm.

so, the total surface area of regular pyramid would be,

S = B + 43.3

S = 135 + 43.3

S = 178.3 sq.mm.

This is the required surface area.

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The probability of randomly drawing a vowel is 2/8

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

P, E, R, C, E, N, T, S,

Using the above as a guide, we have the following:

Vowels = 2

Total = 8

So, we have

P(Vowel) = Vowel/Total

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

P(Vowel) = 2/8

Hence, the solution is 2/8

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The age of a movie attendee with a z-score of 0.89 is approximately 41 years.

Normal distribution problem

Let's use the standard normal distribution table or a calculator to find the proportion/probability corresponding to the given z-score of 0.89, and then use the inverse z-score formula to find the corresponding age value.

Using a standard normal distribution table, the proportion/probability corresponding to a z-score of 0.89 is 0.8133.

Using the inverse z-score formula:

Rearranging the formula to solve for x, we get:

Therefore, the age of a movie attendee with a z-score of 0.89 is approximately 41 years rounded to the nearest whole number.

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The point estimate for the difference between the two population means is $1.25.

To find the point estimate for the difference between the two population means, subtract the sample mean of company B from the sample mean of company A:

Point estimate = $17.75 - $16.50 = $1.25

This means that the average hourly wage in company A is estimated to be $1.25 higher than the average hourly wage in company B. It's important to note that this is just a point estimate and not a conclusive result. To determine if this difference is statistically significant, further hypothesis testing would be needed.

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Applying the Friedman test, we conclude that there is evidence that at least two population locations differ at a significance level of 10%, since our calculated [tex]$\chi^2$[/tex] value (979.5) is greater than the critical value (7.81).

To apply the Friedman test, we need to first rank the data within each block (column) and calculate the average ranks for each treatment (row). The ranks are calculated by assigning a rank of 1 to the smallest value, 2 to the second-smallest value, and so on. Ties are given the average rank of the tied values.

Treatment Block 1 Block 2 Block 3 Block 4 Ranks

1 2 1.5 3 3.5 10

2 1 3 5 5 14

3 3 2.5 4 2 11.5

4 2 4 2 1 9

5 1 4.5 1 4.5 11

The Friedman test statistic is calculated as:

[tex]$ \chi^2 = \frac{12}{n(k-1)} \left[ \sum_{j=1}^k \left( \sum_{i=1}^n R_{ij}^2 - \frac{n(n+1)^2}{4} \right) \right] $[/tex]

where [tex]$n$[/tex] is the number of blocks, [tex]$k$[/tex] is the number of treatments, and [tex]$R_{ij}$[/tex] is the rank of the [tex]$j^t^h[/tex] treatment in the [tex]$i^t^h[/tex] block.

In this case, [tex]$n=4$[/tex] and [tex]$k=5$[/tex], so:

[tex]$ \chi^2 = \frac{12}{4(5-1)} \left[ \sum_{j=1}^5 \left( \sum_{i=1}^4 R_{ij}^2 - \frac{4(4+1)^2}{4} \right) \right] $[/tex]

[tex]$ \chi^2 = \frac{3}{2} \left[ (10^2 + 14^2 + 11.5^2 + 9^2 + 11^2) - \frac{4(5^2)}{4} \right] $[/tex]

[tex]$ \chi^2 = \frac{3}{2} \left[ 727 - 50 \right] = 979.5 $[/tex]

The critical value for the Friedman test with [tex]$k=5$[/tex] treatments and [tex]$n=4$[/tex]blocks, at a significance level of [tex]\alpha = 0.1$,[/tex] is:

[tex]$ \chi_{0.1}^2 = 7.81 $[/tex]

Since our calculated [tex]$\chi^2$[/tex] value (979.5) is greater than the critical value (7.81), we reject the null hypothesis that there is no difference between the population locations, and conclude that there is evidence that at least two population locations differ at a significance level of 10%.

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Now, let G = Bd2(0,1) be the closed ball of radius 1 centered at the origin in RP^2. Since the distance between 0 and a is greater than 1, the point a is not in G. So, G

In the given problem, we are dealing with the real projective plane RP^2. RP^2 is a space that is obtained from the Euclidean plane R^2 by identifying each point (x,y) with its antipodal point (-x,-y), except for the origin (0,0), which is self-antipodal. So, RP^2 can be thought of as the set of all lines that pass through the origin in R^3.

Now, let us consider the points 0 = (0,0) and a = (2,-1) in RP^2. The distance between two points in RP^2 is defined as the minimum distance between any two representatives of the points. So, the distance between 0 and a in RP^2 is given by:

d(0,a) = min{d(x,y) : x is a representative of 0, y is a representative of a}

To find this distance, we need to find representatives of 0 and a. Since 0 is self-antipodal, we can choose any representative of 0 that lies on the unit sphere S^2 in R^3. Similarly, we can choose any representative of a that lies on the line passing through a and the origin in R^3.

Let us choose the representatives as follows:

For 0, we choose the point (0,0,1) on the upper hemisphere of S^2.

For a, we choose the line passing through the origin and a, which is given by the equation x = t(2,-1,0) for some t in R. We can choose t = 1/√5 to normalize this vector to have length 1.

Now, we need to find the minimum distance between any point on the upper hemisphere of S^2 and any point on the line x = (2/√5,-1/√5,0). This can be done by finding the closest point on the line to the center of the sphere (0,0,1), and computing the distance between that point and the center.

Let P be the point on the line that is closest to the center of the sphere. Then, the vector OP (where O is the origin) is perpendicular to the line and has length 1. So, we can write:

(2/√5)t - (1/√5)s = 0

t^2 + s^2 = 1

where t and s are the parameters for the line x = t(2/√5,-1/√5,0). Solving these equations, we get:

t = 2/√5, s = 1/√5

So, the closest point on the line to the center of the sphere is P = (2/√5,-1/√5,0).

The distance between P and the center of the sphere is given by:

d((0,0,1),(2/√5,-1/√5,0)) = √(1 + (2/√5)^2 + (-1/√5)^2) = √(6/5)

Therefore, the distance between 0 and a in RP^2 is given by:

d(0,a) = 2/√5 * √(6/5) = 2√6/5

Now, let G = Bd2(0,1) be the closed ball of radius 1 centered at the origin in RP^2. Since the distance between 0 and a is greater than 1, the point a is not in G. So, G

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Andrés will be 34 years old and Juan will be 13 years old.

From the question, we shall make  Juan's age as J as well as Andrés' age as A.

According to the question, Juan is 21 years younger than Andrés, so we can write it as:

J = A - 21  --------Equation 1

The sum of their ages is 47 will be:

J + A = 47  ----------Equation 2

Then we substitute the sum of J from Equation 1 into Equation 2 to remove J and look for A:

(A - 21) + A = 47

2A - 21 = 47

2A = 47 + 21

2A = 68

A = 68 / 2

A = 34

Hence Andrés' age (A) is 34 years.

So we also need to substitute the value of A back into Equation 1 to know Juan's age (J):

J = A - 21

J = 34 - 21

J = 13

Hence, Juan's age (J) is 13 years.

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Juan is 21 years younger than Andrés and we know that the sum of their ages is 47. How old is each of them?

Armando was charged approximately $5.08 in interest for the billing cycle.

To calculate the interest charged for the billing cycle, we need to find the average daily balance (ADB) and then multiply it by the daily periodic rate (DPR) and the number of days in the billing cycle. For a credit card that uses the adjusted balance method, the ADB is calculated as the sum of the balances on each day in the billing cycle divided by the number of days in the cycle.

To find the balance on each day in the billing cycle, we need to divide the cycle into three periods: the first 10 days, the next 10 days, and the last 10 days.

During the first 10 days, the balance was $2500, so the total balance for this period was:

10 * $2500 = $25000

During the next 10 days, the balance was $900, so the total balance for this period was:

10 * $900 = $9000

During the last 10 days, the balance was $2200, so the total balance for this period was:

10 * $2200 = $22000

The total balance for the entire billing cycle was:

$25000 + $9000 + $22000 = $56000

The number of days in the billing cycle is 30, so the ADB is:

ADB = $56000 / 30 = $1866.67

The DPR can be calculated by dividing the APR by the number of days in the year:

DPR = 0.33 / 365 = 0.00090411

Finally, we can calculate the interest charged for the billing cycle by multiplying the ADB by the DPR and the number of days in the billing cycle:

Interest = ADB * DPR * Days

Interest = $1866.67 * 0.00090411 * 30

Interest ≈ $5.08

Therefore, Armando was charged approximately $5.08 in interest for the billing cycle.

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The probability of having no more than four errors out of 100 digits received is about 99.3%.

To solve this problem, we can use the binomial distribution.

Let p be the probability of a single digit being received in error, which is equal to Pe. The probability of a single digit being received correctly is therefore 1-Pe.

Let X be the number of digits received in error out of 100. Then X follows a binomial distribution with parameters n=100 and p=Pe.

To find the probability that no more than four digits are in error, we need to calculate [tex]P(X\leq4)[/tex].

We can do this using the cumulative distribution function of the binomial distribution:
[tex]P(X\leq4)[/tex] = ΣP(X=k) for k=0 to 4

= P(X=0) + P(X=1) + P(X=2) + P(X=3) + P(X=4)

= [tex]C(100,0)(1-Pe)^{100} + C(100,1)(1-Pe)^{99}Pe + C(100,2)(1-Pe)^{98}Pe^{2} + C(100,3)(1-Pe)^{97}Pe^{3} + C(100,4)(1-Pe)^{96}Pe^{4}[/tex]

where C(n,k) is the binomial coefficient (n choose k), which represents the number of ways to choose k elements out of a set of n.

[tex]P(X\leq4)[/tex] = 0.9930

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Answer:

24.997 cm

Step-by-step explanation:

         r = 7 cm

[tex]\sf Circumference \ of \ quarter \ circle = \dfrac{1}{2}*\pi *r[/tex]

                                               [tex]\sf =\dfrac{1}{2}*3.142*7\\\\= 10.997 \ cm[/tex]

        Perimeter of quarter circle  = r + r + circumference of quarter circle

                                                      = 7 + 7 + 10.997

                                                      = 24.997 cm

Using the considered ordered pairs:

The domain is {1,3,5}

The range is {2,4,5,6}

It is not a function

We have,

To determine the domain and range of a function, we need to know the set of possible input values (domain) and the set of possible output values (range).

To determine if a relation is a function, we need to check if every input has a unique output.

In other words, if there are no two distinct ordered pairs with the same first element.

This means,

A function can be one-to-one or onto.

For example,

Let's consider the relation given by the set of ordered pairs:

{(1,2), (3,4), (1,5), (5,6)}

To determine if this is a function, we first need to check if there are any two distinct ordered pairs with the same first element.

In this case, we see that both (1,2) and (1,5) have a first element of 1, so this relation is not a function.

The domain of this relation is the set of all first elements of the ordered pairs, which is {1,3,5}.

The range of this relation is the set of all second elements of the ordered pairs, which is {2,4,5,6}.

Thus,

Domain: {1,3,5}

Range: {2,4,5,6}

Not a function

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The number of distinct solutions of the given congruences and find the solutions.

a) 7x = 9 (mod 14) has no solution

b) 8x = 9 mod (mod 11) [tex]x\equiv 8 \hspace{0.1cm}(mod \hspace{0.1cm}11)[/tex]

c) 16x = 20 (mod 36) [tex]8, 17, 26, 35 \hspace{0.2cm}mod(36)[/tex]

(a) 7x = 9mod(14) 20

Here, gcd(7,14) =7 , and we know that 7 does not divide 9.

Thus, from Theorem 1, we can say that it has no solution.

(b)8x =  9 mod(11)

Here, gcd(8,11) = 1, so using theorem 2, we can say that it has a unique solution.

For that we need to find [tex]\phi (11)[/tex],  Since 11 is an prime number, therefore the gcd of 11 with any positive integer smaller than 11 will be 1. So,

[tex]\phi (11)[/tex] = 10  = |{1,2,3,..., 10}| ,

So, the solution for the congruence is given by using theorem 2:

[tex]x\equiv a^{\phi (m)-1}b \hspace{0.1cm}(mod \hspace{0.1cm}m)[/tex]

x = 810-19 (mod 11) (

x = 88*9*8 (mod 11)

[tex]x\equiv 64^{4}*72 \hspace{0.1cm}(mod \hspace{0.1cm}11)x\equiv 9^{4}*6 \hspace{0.1cm}(mod \hspace{0.1cm}11)x\equiv 81^{2}*6 \hspace{0.1cm}(mod \hspace{0.1cm}11)[/tex]

x = 16 * 6 (mod 11)

2 = 5*6 (mod 11

[tex]x\equiv 8 \hspace{0.1cm}(mod \hspace{0.1cm}11)[/tex]

which is the final solution.

(c) [tex]16x\equiv 20 \hspace{0.1cm}(mod \hspace{0.1cm}36)[/tex]

Here, d=gcd(16,36) =4 and 4 divides 20, so it has 4 unique solutions.

So, we will use theorem 3.

Divide by 4 whole congruence:

[tex]16x/4\equiv 20/4 \hspace{0.1cm}(mod \hspace{0.1cm}36/4)[/tex]

[tex]4x\equiv 5 \hspace{0.1cm}(mod \hspace{0.1cm}9)[/tex]

[tex]So, \phi (9)=\left | \left \{ 1,2,4,5,7,8 \right \} \right |=6[/tex]

[tex]So, x\equiv 4^{\phi (9)-1}*5 \hspace{0.1cm}(mod \hspace{0.1cm}9)[/tex]

[tex]x\equiv 4^{5}*5 \hspace{0.1cm}(mod \hspace{0.1cm}9)[/tex]

[tex]x\equiv 4^{4}*20 \hspace{0.1cm}(mod \hspace{0.1cm}9)[/tex]

[tex]x\equiv 16^{2}*20 \hspace{0.1cm}(mod \hspace{0.1cm}9)[/tex]

x = 72 * 2 (mod 9)

[tex]x\equiv 8 \hspace{0.1cm}(mod \hspace{0.1cm}9)[/tex]

Thus, the 5 unique solutions using theorem3 are given as follows:

[tex]t,t+\frac{m}{d}, t+\frac{2m}{d},. . ., t+\frac{(d-1)m}{d} \hspace{0.2cm} mod(m)[/tex]

[tex]8, 17, 26, 35 \hspace{0.2cm}mod(36)[/tex].

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The solution to the partial differential equation is u(x,t) = [tex]kx^{a/10[/tex], where k is a constant.

A differential equation is a mathematical formula that includes one or more terms as well as the derivatives of one variable with respect to another.

To find the Laplace transform of f(t) = te^(-4t) cosh(5t), we use the formula:

[tex]L{f(t)} = \int_0 f(t) e^{(-st)} dt[/tex]

= ∫₀^∞ [tex]te^{(-4t)} cosh(5t) e^{(-st)} dt[/tex]

= ∫₀^∞ t cosh(5t) [tex]e^{(-(4+s)t)[/tex] dt

Using integration by parts with u = t and dv = cosh(5t) [tex]e^{(-(4+s)t)[/tex] dt, we get:

L{f(t)} = [-t/(4+s) cosh(5t) [tex]e^{(-(4+s)t)[/tex]]₀^∞ + ∫₀^∞ (1/(4+s)) cosh(5t) [tex]e^{(-(4+s)t)[/tex] dt

Simplifying the boundary term, we get:

L{f(t)} = (1/(4+s)) ∫₀^∞ cosh(5t) [tex]e^{(-(4+s)t)}[/tex] dt

= (1/(4+s)) ∫₀^∞ (1/2) [[tex]e^{(5t)[/tex] + [tex]e^{(-5t)[/tex]] [tex]e^{(-(4+s)t)[/tex] dt

= (1/2(4+s)) ∫₀^∞ [[tex]e^{((1-s)t)[/tex] + [tex]e^{(-(9+s)t)[/tex]] dt

Using the Laplace transform of [tex]e^{(at)[/tex], we get:

L{f(t)} = (1/2(4+s)) [(1/(s-1)) + (1/(s+9))]

= (1/2) [(1/(4+s-4)) + (1/(4+s+36))]

= (1/2) [(1/(s+1)) + (1/(s+40))]

To solve the partial differential equation au/ax = 10 au/at by variable separable method, we can write:

(1/u) du/dt = 10/a dx/dt

Integrating both sides with respect to t and x, we get:

ln|u| = 10ax + C₁

Taking the exponential of both sides, we get:

|u| = [tex]e^{(10ax+C_1)[/tex]

= [tex]e^{(10ax)[/tex] [tex]e^{(C_1)[/tex]

= [tex]ke^{(10ax)[/tex]  (where k is a constant)

Since u is positive, we can drop the absolute value and write:

[tex]u = ke^{(10ax)[/tex]

Taking the partial derivative of u with respect to x, we get:

au/ax = [tex]10ke^{(10ax)[/tex]

Substituting this into the given partial differential equation, we get:

[tex]10ke^{(10ax)[/tex] = 10 au/at

Dividing both sides by 10u, we get:

(1/u) du/dt = a/(10x)

Integrating both sides with respect to t and x, we get:

ln|u| = (a/10) ln|x| + C₂

Taking the exponential of both sides, we get:

|u| = [tex]e^{(a/10 ln|x|+C_2)[/tex]

= [tex]e^{(ln|x|^{a/10)[/tex] [tex]e^{(C_2)[/tex]

= [tex]kx^{a/10[/tex]  (where k is a constant)

Since u is positive, we can drop the absolute value and write:

[tex]u = kx^{a/10[/tex]

The solution to the partial differential equation is u(x,t) = [tex]kx^{a/10[/tex], where k is a constant.

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Answer: You can convert it by dividing it by 12 which would give you 3.5 and since half of 12 is 6 the answer is 3ft and 6inches

Step-by-step explanation:

It can be shown that PSL(2,7) has order 168, which is equal to 2^3 * 3 * 7. Since 7 is a prime and 2 and 3 are coprime to 7, it follows that PSL(2,7) is a simple group of order 168.

By Sylow's theorems, we know that there exist Sylow p-subgroup, Sylow q-subgroup, and Sylow r-subgroup in G. Let P, Q, and R be the respective Sylow p, q, and r-subgroups. Then by the Sylow's theorems, we have:

|P| = p^a for some positive integer a and p^a divides qr

|Q| = q^b for some positive integer b and q^b divides pr

|R| = r^c for some positive integer c and r^c divides pq

Since p, q, and r are distinct primes, it follows that p, q, and r are pairwise coprime. Therefore, we have:

p^a divides qr

q^b divides pr

r^c divides pq

Since p, q, and r are primes, it follows that p^a, q^b, and r^c are all prime powers. Therefore, we have:

p^a = q^b = r^c = 1 (mod pqr)

By the Chinese remainder theorem, it follows that there exists an element g in G such that:

g = 1 (mod P)

g = 1 (mod Q)

g = 1 (mod R)

By Lagrange's theorem, we have |P| = p^a divides |G| = pqr. Similarly, we have |Q| = q^b divides |G| and |R| = r^c divides |G|. Therefore, we have:

|P|, |Q|, |R| divide |G| and |P|, |Q|, |R| < |G|

Since |G| = pqr, it follows that |P|, |Q|, |R| are all equal to p, q, or r. Without loss of generality, assume that |P| = p. Then |G : P| = |G|/|P| = qr. Since qr is not a prime, it follows that there exists a nontrivial normal subgroup of G by the corollary of Lagrange's theorem. Therefore, G is not a simple group.

An example of a simple group of order pqr where p, q, and r are distinct primes is the projective special linear group PSL(2,7). It can be shown that PSL(2,7) has order 168, which is equal to 2^3 * 3 * 7. Since 7 is a prime and 2 and 3 are coprime to 7, it follows that PSL(2,7) is a simple group of order 168.

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The number of textbooks of each type sold is found by solving the system of equations and got as,

Number of chemistry textbooks = 210

Number of history textbooks = 158

Given that,

A textbook store sold a combined total of 368 chemistry and history textbooks in a week.

let c be the number of chemistry textbooks sold and h be the number of history textbooks sold.

c + h = 368

The number of history textbooks sold was 52 less than the number of chemistry textbooks sold.

h = c - 52

Substituting the second equation in first,

c + (c - 52) = 368

2c = 420

c = 210

h = 210 - 52 = 158

Hence the number of each textbooks is 210 and 158.

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The degree of the polynomial 2 + 2w⁶ + 15y²w + 64u² - uy⁶ is found to be 7 as the term with highest power is 7.

A degree of the polynomial is the highest power to which any of its term is expressed as. For finding the degree we have to find the term with the highest degree in the polynomial. The given polynomial is,

2 + 2w⁶ + 15y²w + 64u² - uy⁶,

The term with the highest degree is uy⁶, which has a degree of 7 (the sum of the exponents of u and y ). Therefore, the degree of the polynomial is 7.

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Complete question - Give the degree of the polynomial. 2 + 2w⁶ + 15y²w + 64u² - uy⁶.

Since we know that the heptagon is convex, all of its interior angles are less than 180 degrees. Let's call the smallest angle x degrees.

According to the problem, the other six angles are each 1 degree larger than the angle just smaller than it. This means the second angle is x+1, the third angle is x+2, and so on, until we get to the seventh angle which is x+6.

We know that the sum of the interior angles of a heptagon is (7-2) * 180 = 900 degrees. So we can set up an equation:

x + (x+1) + (x+2) + (x+3) + (x+4) + (x+5) + (x+6) = 900

Simplifying this equation, we get:

7x + 21 = 900

Subtracting 21 from both sides:

7x = 879

Dividing both sides by 7:

x = 125.57

So the smallest angle is approximately 125.57 degrees.

To find the fourth largest angle, we need to find the value of x+3.

x+3 = 125.57 + 3 = 128.57

So the fourth largest angle is approximately 128.57 degrees.

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Both statements are true. When events A and B are mutually exclusive, meaning they cannot occur simultaneously, you can use the special rule of addition.

If events A and B are not mutually exclusive, meaning they can occur together, you should use the general rule of addition. The specific rule of addition can only be used when dealing with mutually exclusive events, while the general rule of addition can be used for any two events, whether they are mutually exclusive or not. The specific rule of addition states that the probability of either event A or event B occurring is equal to the sum of their individual probabilities, while the general rule of addition states that the probability of event A or event B occurring is equal to the sum of their individual probabilities minus the probability of their intersection (if they are not mutually exclusive).

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The midpoint of the two points of P (-3,-7) and Q (3,-5) is (0, -6).

When you have the vertices of two points, you can find the midpoint by the formula :

= ( ( x 1 + x 2 ) / 2 , ( y 1 + y 2 ) / 2 )

Solving for the midpoint therefore gives:

= ( ( - 3 + 3 ) / 2 , ( - 7 + ( - 5 ) ) / 2 )

=  ( 0 / 2 , ( - 12 ) / 2 )

= (0, -6)

In conclusion, the midpoint is (0, -6).

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True statement is Player 3 is more likely to hit the ball than Player 2 because P(Player 3) > P(Player 2)

Convert to decimals first

Player 1: 7/11 ≈ 0.636

Player 2: 6/9 = 2/3 ≈ 0.667

Player 3: 5/7 ≈ 0.714

From here we have to compare the options

1. False. Player 1 is more likely to hit the ball than Player 2 because P(Player 1) >P(Player 2)

Reason

(0.636 < 0.667)

2. False. Player 2 is more likely to hit the ball than Player 3 because P(Player 2) > P(Player 3)

Reason

(0.667 < 0.714)

3. False. Player 1 is more likely to hit the ball than Player 3 because P(Player 1) > P(Player 3)

Reason

(0.636 < 0.714)

4. True. Player 3 is more likely to hit the ball than Player 2 because P(Player 3) > P(Player 2)

Reason

(0.714 > 0.667)

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The discount paid according to the given conditions is OMR 450.

The invoice amount is OMR 15,000, and it has the terms 6/10, 3/15, n/30, which mean that you can get a 6% discount if you pay within 10 days, a 3% discount if you pay within 15 days, and no discount if you pay after 30 days. The invoice is dated on June 15 and the goods are received on June 23, but the payment is made on July 5.

Since July 5 is 20 days after the invoice date (June 15), you are eligible for a 3% discount because it falls within the 15-day period.

To calculate the discount, multiply the invoice amount by the discount percentage:

15,000 * 0.03 = 450

The discount paid is OMR 450.

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The number of hours that it will take Lindsey to rake the lawn alone will also be 3 hours just like Camilla.

The total number of hours it takes two people to rake the lawn = 2 hours.

The more people the less number of hours it will take to take the lawn.

That is;

If 2 people = 2 hours

Camilla = 3 hours

1 person (Lindsey) = 3 hours.

Therefore, for either Lindsey or Camilla, they will rake separately for 2 hours when working alone.

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