a is an arithmetic sequence where the 1st term of the sequence is {\textstyle\frac{3}{2}} and the 13th term of the sequence is -{\textstyle\frac{81}{2}}. Find the 13th partial sum of the sequence.

Answer:

D. Exactly 1 solution

Step-by-step explanation:

The system of equations has exactly one solution because when we solved the equations, we found a unique set of values for the variables x and y that satisfy both equations simultaneously.

In this case, we determined that x = 1 and y = 6 satisfy both equations:

For the equation y = 4x + 2, when we substitute x = 1, we get y = 4(1) + 2 = 6.

For the equation y - 2x = 4, when we substitute x = 1 and y = 6, we have 6 - 2(1) = 6 - 2 = 4.

Therefore, the values x = 1 and y = 6 make both equations true, and there are no other values of x and y that satisfy the system. Hence, the system of equations has exactly one solution.

Work Shown:

x = first integer

x+1 = second consecutive integer just after x

x+2 = third consecutive integer just after x+1

x+3 = fourth consecutive integer just after x+2

Add up those expressions

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

That sum is "16 less than 6 times the first integer", so,

sum = 6*(first) - 16

4x + 6 = 6x - 16

4x-6x  = -16-6

-2x  = -22

x = -22/(-2)

x = 11 is the first integer

The four consecutive integers are 11, 12, 13, 14.

As a check, the sum is 11+12+13+14 = 50

Then notice how 6x-16 = 6*11-16 = 50 to help confirm we have the correct answer.

Answer:

Its speed should increase by 9.5km/hr

Step-by-step explanation:

speed is calculated by distance divided by time

we know that it took the tanker 10 hours to drive 380km (38km times 10 hours)

so if we divide the 380km by 8 hours we see that he should be driving at 47.5km/hr in order to travel the same distance in 8 hours

the question asks by how much speed should it INCREASE, so we subtract the 38km from the 47.5km to find the difference in speed, which is 9.5km

The decimal number represented by the grid is 0.04.(option-a)

In the grid, we have 10 rows and 10 columns, which represent 100 equal parts. From the grid, we can see that there are 4 shaded parts.

To determine the decimal number represented by the grid, we need to determine the value of each shaded part based on the total number of equal parts represented on the grid. There are a total of 100 equal parts on the grid, so each part has a value of:

1 / 100 = 0.01

Since there are 4 shaded parts, we simply multiply 0.01 by 4 to get the value of the shaded portion:

0.01 * 4 = 0.04

In summary, we can determine the decimal number represented by the grid by dividing the total number of equal parts represented on the grid by the number of shaded parts and then multiplying by the value of each equal part. Based on this process, the grid represents the decimal number 0.04.(option-a)

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Note: The complete question is-"Which decimal number is represented by the shaded grid?" Choose from the options below.

a.0.04

b.4

c.0.004

d.0.4

The probability that the third largest observation in the sample is less than 0.7 is  0.2401 =  24.01%.

The sample size n = 5,

Therefore the order statistics will be represented as X₁, X₂, X₃, X₄, and X₅.

Probability that X₃ is less than 0.7:

Since X₃ is the third largest observation =  (X₁ and X₂) < 0.7.

The probability that X₃ is less than 0.7 is (0.7)² = 0.49.

.

The probability that both X₁ and X₂ are less than or equal to 0.7 is (0.7)² = 0.49 because in a continuous uniform distribution, the probability of any single observation being less than 0.7 is 0.7 - 0 = 0.7.

We then get the product of both cases:

Probability = 0.49 * 0.49 = 0.2401

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The number 5 represents the 5 dogs that are more than 8 years old, and the Number 2 represents the 2 cats that are more than 8 years old.

Based on the given data, we can create a Venn diagram to illustrate the number of animals that are dogs and are more than 8 years old.

Let's label two intersecting circles representing dogs and cats respectively. In the region where the circles overlap, we will place the animals that are both dogs and more than 8 years old.

First, let's count the number of dogs that are more than 8 years old. Based on the data, we have the following dogs that fit this criterion:

- Dog: 8 (not more than 8 years old)

- Dog: 9

- Dog: 12

- Dog: 9

- Dog: 11

So, there are a total of 5 dogs that are more than 8 years old.

Now, let's count the number of cats that are more than 8 years old. Based on the data, we have the following cats that fit this criterion:

- Cat: 9

- Cat: 13

So, there are a total of 2 cats that are more than 8 years old.

To create the Venn diagram, we will place the number 5 inside the region representing dogs, and the number 2 inside the region representing cats. The region where the circles overlap will be left empty since there are no animals that are both dogs and cats in this dataset.

The Venn diagram representing the number of animals that are dogs and are more than 8 years old would look as follows:

         Dogs

       ___________

      |      |      |

      |  5   |      |

      |______|______|

         Cats

       ___________

      |      |      |

      |      |  2   |

      |______|______|

In the Venn diagram, the number 5 represents the 5 dogs that are more than 8 years old, and the number 2 represents the 2 cats that are more than 8 years old.

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Answer:

To determine the next whole number after 214 in the base-five system, we need to understand the place value system of base five. In base five, each digit represents a power of five. The rightmost digit is the ones place, the next digit to the left is the fives place, the next digit to the left is the twenty-fives place, and so on.

In this case, 214 is already in base five, so we need to find the next number that follows 214. Since the largest digit in base five is 4 (representing four units of that place value), we need to carry over to the next place value.

Starting from the rightmost digit, which is the ones place, we have 4. Since we cannot increase the digit in the ones place any further, we carry over to the fives place. The fives place digit is 1, and adding 1 to it results in 2. Therefore, the next whole number after 214 in the base-five system is 221.

Step-by-step explanation:

The next whole number after 214 in the base-five system is 220 (or 60, written in base 10)

Here we are in base five, so the digits can be only the ones in the set {0, 1, 2, 3, 4}

Here we want to find the number next to 214.

Notice that the first digit is already on the maximum value, so it returns to the smaller one and we add 1 in the next value, we will get:

220

That is the next whole number, and writting this in base 10 we will get:

2*5² + 2*5 + 0*5⁰

2*25 + 10 + 0

60

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11t = 8(t + 1) - 0.5

11t = 8t + 8 - 0.5

3t = 7.5

t = 7.5 / 3

t = 2.5

2.5 + 1

3.5 hours

Jack took approximately 3.5 hours to cycle from home to the park.

Answer:

Slope is 5

Step-by-step explanation:

Slope-intercept form for a linear equation is y=mx+b where m is the slope and b is the y-intercept.

In this equation, our slope is m=5, and the y-intercept would be b=1.

The set of integers that are multiples of 5 can be represented using set notation as:

{...,-10, -5, 0, 5, 10, 15, 20, 25, 30, ...}

In set notation, this can be written as:

{ x | x ∈ ℤ, x is a multiple of 5 }

where "x" represents an element in the set, "ℤ" represents the set of integers, and the condition "x is a multiple of 5" specifies the property that the element must satisfy.

Answer: Put an arrow from -3 to the space that is to the left of -5.

It shows the equation -3 - 2 1/3.

Answer:

84

Step-by-step explanation:

[tex]\displaystyle \frac{93+78+89+83+83+x}{6}=85\\\\\displaystyle 426+x=510\\\\x=84[/tex]

Therefore, Erin would need to score an 84 on her last test to get a mean score of 85.

Answer:

Make the -4 exponent in the denominator positive.

Answer:

  (D)  (6 -z) + (z -5)

Step-by-step explanation:

You want the equivalent of the absolute value expression for the domain z < 5:

  |z -6| -|z -5|

The expression |z -6| is defined as -(z -6) for z < 6.

The expression |z -5| is defined as -(z -5) for z < 5.

The difference of the two expressions for z < 5 is ...

  (-(z -6)) -(-(z -5))

  = (6 -z) +(z -5) . . . . . . matches choice D

__

Additional comment

The absolute value function negates its argument when that argument is negative. For the given domain, z < 5, both arguments are negative, so both are negated.

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The solution set of y (0, 3) and (0, 9)

For x there is no point is given.

The Cartesian System is the system that we use to name points in a plane. The number line gives rise to the cartesian form.

To comprehend the cartesian coordinate system, we must first master the number line. We have the following parameters defined in this system:

⇒ The X-axis and Y-axis are two perpendicular lines.

⇒ The plane is known as the Cartesian, or coordinate plane, and the two lines X and Y, when combined, are known as the system's coordinate axes.

⇒ The plane is divided into four quadrants by the two coordinate axes.

⇒ The intersection of the axes is the Cartesian System's zero. This point will be designated by the letter O. The origin's coordinates are indicated as (0, 0).

⇒ To describe the location of any point P in the plane, we measure the distance x along X, followed by the distance y parallel to Y, to go from O to P. Distances can be detrimental.

Then,

For the X axis all the points on the x axis be the solutions of x.

Since,

There are no points of x axis is given.

For the Y axis all the points on the y axis be the solutions of y.

Since,

Here,

(0, 3) and (0, 9) are the solution set of  for y.

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The constant k that makes f(x) = k * e^(x - 1) a probability density function on the interval [0,1] is k = e / (e - 1).

To determine the constant k that makes the function f(x) = k * e^(x - 1) a probability density function on the interval [0,1], we need to ensure that the following conditions are satisfied:

The function is non-negative: f(x) ≥ 0 for all x in [0,1].

The integral of the function over the interval [0,1] is equal to 1: ∫[0,1] f(x) dx = 1.

Let's analyze each condition step by step:

Non-negativity:

For f(x) to be non-negative on [0,1], we need k * e^(x - 1) ≥ 0.

Since k is a constant, it is always positive or zero. So, k ≥ 0.

Integral equal to 1:

To find the value of k that makes ∫[0,1] f(x) dx equal to 1, we integrate the function over the interval [0,1] and set it equal to 1:

∫[0,1] f(x) dx = ∫[0,1] k * e^(x - 1) dx

Using the properties of exponential functions, we can simplify the integral:

∫[0,1] k * e^(x - 1) dx = k * ∫[0,1] e^(x - 1) dx

= k * [e^(x - 1)] evaluated from 0 to 1

= k * (e^(1 - 1) - e^(0 - 1))

= k * (1 - 1/e)

We want this expression to equal 1:

k * (1 - 1/e) = 1

Solving for k:

k = 1 / (1 - 1/e)

k = e / (e - 1)

Therefore, the constant k that makes f(x) = k * e^(x - 1) a probability density function on the interval [0,1] is k = e / (e - 1).

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Answer:

B.  1.5832

Step-by-step explanation:

A Probability Density Function (PDF) is a function that provides the likelihood of a random variable falling within a particular range of values.

The probability of X landing somewhere between a and b is:

[tex]\displaystyle P(a \leq X \leq b)=\int_{a}^{b} f_X(x)\; \text{d}x[/tex]

[tex]\textsf{where\;$f_X(x)$\;is\;the\;PDF.}[/tex]

For the given function f(x) to be a probability density function (pdf) on the interval [0, 1], the function must satisfy two conditions:

For function f(x) to be non-negative on [0, 1], k must be greater than or equal to 0.

To find the value of k, set the integral of the function to 1 and solve for k:

[tex]\begin{aligned}\displaystyle \int^{1}_{0} ke^{x-1}\; \text{d}x&=1\\\\k\int^{1}_{0} e^{x-1}\; \text{d}x&=1\\\\\int^{1}_{0} e^{x-1}\; \text{d}x&=\dfrac{1}{k}\\\\\left[\vphantom{\dfrac12}e^{x-1}\right]^1_0&=\dfrac{1}{k}\\\\e^{1-1}-e^{0-1}&=\dfrac{1}{k}\\\\e^0-e^{-1}&=\dfrac{1}{k}\\\\1-\dfrac{1}{e}&=\dfrac{1}{k}\\\\\dfrac{e-1}{e}&=\dfrac{1}{k}\\\\k&=\dfrac{e}{e-1}\\\\k&=1.58197670...\\\\k&=1.5820\; \sf(4\;d.p.)\end{aligned}[/tex]

Therefore, k = 1.5820, rounded to four decimal places.

The closest match from the given answer options is B) k = 1.5823.

However, please note that k = 1.5823 returns an area under the curve of 1.00020436023442, which is not exactly 1.

[tex]\hrulefill[/tex]

Differentiation rules used:

[tex]\boxed{\begin{minipage}{5.5 cm}\underline{Differentiating $e^{f(x)}$}\\\\If $y=e^{f(x)}$, then $\dfrac{\text{d}y}{\text{d}x}=f\:'(x)e^{f(x)}$\\\end{minipage}}[/tex]

[tex]\boxed{\begin{minipage}{4 cm}\underline{Differentiating $ax$}\\\\If $y=ax$, then $\dfrac{\text{d}y}{\text{d}x}=a$\\\end{minipage}}[/tex]

[tex]\boxed{\begin{minipage}{4cm}\underline{Differentiating a constant}\\\\If $y=a$, then $\dfrac{\text{d}y}{\text{d}x}=0$\\\end{minipage}}[/tex]

Thus, Gini Coefficient,G = (A / (A + B)) = (1/2) / [(1/2) + (1/2)] = 0.5.Gini Coefficient is 0.5.

Given: Lorenz curve for state A can be given as L(p)=p^7/4.The formula for Gini Coefficient is G=(A/(A+B)).Here, L(p) = p^7/4Therefore, we need to find A and B.

A = Area between the Lorenz curve and the line of equality.B = Area between the Lorenz curve and the X-axis.

The line of equality is the straight line joining the origin and the end point of the Lorenz curve.A + B is equal to the total area of the graph.

L(p) = p^7/4

=> L(p) = p^(4/4) * p^(3/4)

=> L(p) = p * p^(3/4)

=> L(p) = p * L(p)^(3/4)

Now, we will differentiate both sides of the above equation to get the PDF (Probability Density Function) of the Lorenz Curve.

L(p) = p * L(p)^(3/4)dL(p)/dp

= L(p)^(3/4) + (3/4)*p*L(p)^(-1/4)*dL(p)/dp

=> dL(p)/dp

= (4/7)*p^(3/4)L(1) = 1 (as the total population is 100%)

Therefore, A = Area between the Lorenz curve and the line of equality = 1/2 and B = 1/2.

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Answer:

A. 0.2727

Step-by-step explanation:

The Gini coefficient is used to express the extent of income or wealth inequality within a population. It is expressed as a value between 0 and 1, where 0 represents complete equality, indicating that everyone in the population has the exact same wealth, and 1 indicates that one individual or household possesses all the wealth, while everyone else has none. Therefore, a Gini coefficient closer to 0 suggests a more equitable distribution of income or wealth, while a coefficient closer to 1 indicates a higher level of inequality.

The line of perfect equality is a 45-degree line in a graph. It is a reference line that represents a scenario where every member of a population has an equal share of the total income or wealth.

The Gini coefficient is equal to twice the area between the line of perfect equality and the Lorenz curve.

The given Lorenz curve is L(p) = p^(7/4).

Therefore, the line of perfect equality is L(p) = p.

To find the area between the line and curve, we can use integration.

[tex]\boxed{\begin{array}{c}\underline{\sf Area\;between\;two\;curves}\\\\\displaystyle \int^b_a f(x)-g(x)\; \text{d}x\\\\\textsf{where}\;f(x)\;\textsf{is\;above}\;g(x)\;\textsf{between\;the\;interval}\;[a,b]\\\\\end{array}}[/tex]

The cumulative proportion of the population ranges from 0 (0% of the population) to 1 (100% of the population). Therefore, the interval to use for the integration is [0, 1], as it is based on the assumption that the Lorenz curve represents the cumulative proportion of income received by the population.

Set up the integral to find the area between the curves:

[tex]\textsf{Area}=\displaystyle \int^{1}_{0}p\; \text{d}p-\int^{1}_{0} p^{\frac{7}{4}}\; \text{d}p[/tex]

Solve the integral:

[tex]\begin{aligned}\textsf{Area}&=\displaystyle \int^{1}_{0}p\; \text{d}p-\int^{1}_{0} p^{\frac{7}{4}}\; \text{d}p\\\\ &=\left[\dfrac{1}{2}p^2\right]^1_0-\left[\dfrac{4}{11}p^{\frac{11}{4}}\right]^1_0\\\\&=\left(\dfrac{1}{2}(1)^2-\dfrac{1}{2}(0)^2\right)-\left(\dfrac{4}{11}(1)^{\frac{11}{4}}-\dfrac{4}{11}(0)^{\frac{11}{4}}\right)\\\\&=\dfrac{1}{2}-\dfrac{4}{11}\\\\&=\dfrac{11}{22}-\dfrac{8}{22}\\\\&=\dfrac{3}{22}\end{aligned}[/tex]

As the Gini coefficient is equal to twice the area between the line of perfect equality and the Lorenz curve, the Gini coefficient is:

[tex]\begin{aligned}\sf Gini\;coefficient&=2 \cdot \dfrac{3}{22}\\\\&=\dfrac{6}{22}\\\\&=\dfrac{3}{11}\\\\&=0.2727\; \sf (4\;d.p.)\end{aligned}[/tex]

Therefore, the Gini coefficient is 0.2727 (rounded to four decimal places).

The value of F when d=3 and F is inversely proportional to [tex] {d}^{2} [/tex]is 4

Given: F is proportional to  [tex] {d}^{2} [/tex]

and d = 12 , when F = 4

We can rewrite the equation with a proportionality constant k as :

[tex]f = k \div {d}^{2} [/tex]

Substituting values F = 4 and d = 12 we get

4 = k / (12×12)

4 = k / 144

k = 576

Thus the value of the proportionality constant k is 576

Substituting k = 576 and d = 3, we get

F = 576/ (3×3)

F = 576/9

F = 64

Therefore, The value of F when d=3 and F is inversely proportional to

[tex] {d}^{2} [/tex]is 4

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Answer:

Step-by-step explanation:

The stock plan loses $140.00

Multiply the stock plan amount of $2000.00 x 7% = $140.00

Answer:

x=10,y=120

Step-by-step explanation:

3x-30=60 CDA

3x=30

x=10

again,

y+60=180 straight line

y = 120

The expression for the total number of cups Alison buys, in terms of p and b, is 12p + 18b.

The total number of cups Alison buys can be expressed in terms of the number of packs (p) and boxes (b) purchased.

In each pack, there are 12 cups,

so the total number of cups from packs would be 12p.

Similarly, in each box, there are 18 cups,

so the total number of cups from boxes would be \: 18b.

To find the total number of cups, we sum the cups from packs and cups from boxes:

Total cups = 12p + 18b

Therefore, the expression for the total number of cups Alison buys, in terms of p and b, is 12p + 18b.

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Answer:

Step-by-step explanation:

The correct equation that shows a step in the process of completing the square on the given quadratic y = x^2 + 8x – 3 is y = x^2 + 8x + 16 – 3 – 16. Completing the square involves adding and subtracting a constant term in order to create a perfect square trinomial. In this case, the constant term added is (8/2)^2 = 16, which is half the coefficient of the x-term squared. This step transforms the quadratic into the form (x + a)^2 + b, where a represents half of the x-term coefficient and b represents the constant term.

By adding 16 to the equation to create a perfect square trinomial, we need to subtract 16 afterward to maintain the equation’s balance. Thus, the equation becomes:

y = x^2 + 8x + 16 - 3 - 16

Simplifying further:

y = (x + 4)^2 - 19

Therefore, the correct equation is:

y = (x + 4)^2 - 19

6 kiloliters are approximately equal to 202,884.14 fluid ounces.

We have,

To convert 6 kiloliters (kL) to fluid ounces (fl oz), we need to use the conversion factor between these two units.

The conversion factor states that 1 kiloliter is equal to 33814.0227 fluid ounces.

This means that for every kiloliter, there are 33814.0227 fluid ounces.

To convert 6 kiloliters to fluid ounces, we multiply the given value (6 kL) by the conversion factor (33814.0227 fl oz/kL).

= 6 kL x 33814.0227 fl oz/kL

= 202884.1362 fl oz

Therefore,

6 kiloliters are approximately equal to 202,884.14 fluid ounces.

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The estimated cardiac output for the time interval [0, 3] is -9 L/s. that a negative value may indicate an error in the calculation or a direction opposite to the Conventional flow of cardiac output.

The cardiac output using the dye dilution method, we need to calculate the integral of the dye concentration function over the specified time interval [0, 3]. The integral represents the total amount of dye that passes through the system, which is proportional to the cardiac output.

The dye concentration function is given by c(t) = 6t(5 - t), where c(t) represents the concentration in mg/L and t represents the time in seconds.

To find the cardiac output, we need to integrate the concentration function over the interval [0, 3]:

Cardiac Output = ∫[0,3] c(t) dt

Substituting the given function c(t) = 6t(5 - t) into the integral, we have:

Cardiac Output = ∫[0,3] 6t(5 - t) dt

Expanding the expression and integrating term by term, we get:

Cardiac Output = ∫[0,3] (30t - 6t^2) dt

Integrating each term separately, we have:

Cardiac Output = [15t^2 - 2t^3] evaluated from 0 to 3

Plugging in the upper and lower limits, we get:

Cardiac Output = [15(3)^2 - 2(3)^3] - [15(0)^2 - 2(0)^3]

Simplifying the expression, we have:

Cardiac Output = [45 - 54] - [0 - 0]

Cardiac Output = -9 L/s

Therefore, the estimated cardiac output for the time interval [0, 3] is -9 L/s. that a negative value may indicate an error in the calculation or a direction opposite to the conventional flow of cardiac output.

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The total number of coins that were in Kay's bank are 137 coins.

In order to determine the number of dimes and nickels, we would assign a variables to the unknown numbers and then translate the word problem into algebraic equation as follows:

Since she has 11 less dimes than nickels, an equation which models this situation is given by;

n = d + 11     ....equation 1.

Note: 1 nickel is equal to 0.05 dollar and 1 dime is equal to 0.1 dollar.

Additionally, the coins are worth 10 dollars;

0.1d + 0.05n = 10 ....equation 2.

By solving both equations simultaneously, we have:

0.1d + 0.05(d + 11) = 10

0.1d + 0.05d + 0.55 = 10

0.15d = 9.45

d = 63 dimes.

For nickels, we have:

n = d + 11

n = 63 + 11

n = 74

Now, we can determine the total number of coins;

Total number of coins = n + d

Total number of coins = 74 + 63

Total number of coins = 137 coins.

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The amount of three shares are; 26 , 78,  and 130.

We know that ratio is described as the comparison of two quantities to determine how many times one obtains the other. The proportion can be expressed as a fraction or as a sign between two integers.

The sum of the ratio = 1/2+1/3+ 1/4 = 6 + 4 + 3 /12

=  13/12

Then first share = 1/9 × 234

=26 $

Then second share = 3/9×234

=78 $

Then third share = 5/9 × 234

=130 $

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The effect that does NOT relate to one's driving ability is breathalyzer test results indicating a high BAC. Option B.

While the breathalyzer test measures the blood alcohol concentration (BAC), it is a method used to determine the level of alcohol in a person's system and is commonly used in assessing impairment for driving under the influence.

Therefore, it directly relates to one's driving ability and is not excluded from the effects on driving ability caused by a BAC of .2 percent.

On the other hand, options, lack of coordination, impaired gross motor skills, and impaired reactions all directly relate to one's driving ability as they affect the physical and cognitive abilities necessary for safe and efficient driving.

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The phrase "all free variables of a formula ϕ(u1, . . . , un) are among u1, . . . , un" refers to a property of a logical formula ϕ with variables u1, u2, ..., un. In logic and formal systems, variables are used to represent unspecified elements or objects.

When a variable is considered "free" in a formula, it means that it is not bound by any quantifiers or other logical operators in the formula. In other words, it is a variable that is not restricted in any way within the formula.

The given statement implies that all the free variables in the formula ϕ(u1, . . . , un) are explicitly listed among the variables u1, u2, ..., un. In other words, the formula ϕ does not contain any additional free variables beyond the ones explicitly mentioned.

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The scale factor that was used to create triangle D' include the following: C. Scale factor of 1/2

In Mathematics and Geometry, the scale factor of a geometric figure can be calculated by dividing the dimension of the image (new figure) by the dimension of the pre-image (original figure):

Scale factor = Dimension of image (new figure)/Dimension of pre-image (original figure)

By substituting the given dimensions into the formula for scale factor, we have the following;

Scale factor = Dimension of image/Dimension of pre-image

Scale factor = 8/16 = 6/12 = 10/20

Scale factor = 1/2.

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