Identify the transversal Line is the transversal.

The distance between L1 and L2 is 4√5.

To find the distance between two skew lines, L1 and L2, we can find the distance between any point on L1 and the parallel plane containing L2. In this case, we'll find the distance between point A (on L1) and the parallel plane containing line L2.

Step 1: Find the direction vector of line L1.

The direction vector of line L1 is given by the difference of the coordinates of two points on L1:

v1 = B - A = (-9, 4, -2) - (3, -6, -1) = (-12, 10, -1).

Step 2: Find the equation of the parallel plane containing L2.

The equation of a plane can be written in the form ax + by + cz + d = 0, where (a, b, c) is the normal vector of the plane. The normal vector is given by the direction vector of L2, which is (1, 1, 7).

Using the point C (on L2), we can substitute the coordinates into the equation to find d:

1*(-6) + 1*4 + 7*2 + d = 0

-6 + 4 + 14 + d = 0

d = -12.

So the equation of the parallel plane is x + y + 7z - 12 = 0.

Step 3: Find the distance between point A and the parallel plane.

The distance between a point (x0, y0, z0) and a plane ax + by + cz + d = 0 is given by the formula:

Distance = |ax0 + by0 + cz0 + d| / sqrt(a^2 + b^2 + c^2).

In this case, substituting the coordinates of point A and the equation of the plane, we have:

Distance = |1(3) + 1(-6) + 7(-1) - 12| / sqrt(1^2 + 1^2 + 7^2)

        = |-6| / sqrt(51)

        = 6 / sqrt(51)

        = 6√51 / 51.

However, we need to find the distance between the lines L1 and L2, not just the distance from a point on L1 to the plane containing L2.

Since L2 is parallel to the plane, the distance between L1 and L2 is the same as the distance between L1 and the parallel plane.

Therefore, the distance between L1 and L2 is 6√51 / 51.

Simplifying, we get 4√5 / 3 as the exact value of the distance between L1 and L2.

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Answer:

5.09901951359 or you could round it

Step-by-step explanation:

If the area of a square is 26 and all sides of the square are equal to find this you do the square root of 26.

The area of the parallelogram spanned by AB and AC is 2√22 square units.

There are two vectors AB = 3î + ĵ - k and AC = î - 3ĵ + k. Determine the area of the parallelogram spanned by AB and AC. Using the cross-product of vectors AB and AC will help us to calculate the area of the parallelogram spanned by vectors AB and AC.

Area of the parallelogram spanned by two vectors AB and AC is equal to the magnitude of the cross-product of AB and AC. Mathematically, it can be represented as:

Area = |AB x AC|

Where AB x AC represents the cross-product of vectors AB and AC. Now let's calculate the cross-product of vectors AB and AC. 

AB x AC =| i  j  k |3  1  -13 -3  1|

= i [(1) - (-3)] - j [(3) - (-9)] + k [(3) - (-3)] 

AB x AC = 4î + 6ĵ + 6k

Now, the magnitude of

AB x AC is:|AB x AC| = √(4² + 6² + 6²)

|AB x AC| = √(16 + 36 + 36)

|AB x AC| = √88

|AB x AC| = 2√22

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Answer:

35

Step-by-step explanation:

substitute n = 6 into h(n) for number of squares

h(6) = 6² - 1 = 36 - 1 = 35

Answer: the option is question 1 and the other 1 is question 3

Step-by-step explanation: the reason why that is the answer is because the shape of the graph.

The length of each helix in the DNA molecule is approximately 7.68 centimeters.

To calculate the length of each helix, we need to multiply the rise per turn by the number of turns and convert the result to centimeters. Given that each helix rises about 32 Å (angstroms) during each complete turn and there are about 2.5 x 10^8 complete turns, we can calculate the length as follows:

Length of each helix = Rise per turn × Number of turns

                   = 32 Å × 2.5 x 10^8 turns

To convert the length from angstroms to centimeters, we can use the conversion factor: 1 Å = 10^(-8) cm.

Length of each helix = 32 Å × 2.5 x 10^8 turns × (10^(-8) cm/Å)

Simplifying the equation:

Length of each helix = 32 × 2.5 × 10^8 × 10^(-8) cm

                   = 8 × 10^(-6) cm

                   = 7.68 cm (rounded to two decimal places)

Therefore, the length of each helix in the DNA molecule is approximately 7.68 centimeters.

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The roots of the equations are approximately:

Equation 1: z ≈ ±0.855 - 2.488i, ±0.855 + 2.488i

Equation 2: z ≈ 3

To find the roots of the equations, let's solve them one by one:

Equation 1: (5.1)z⁴ + 16 = 0

To solve this equation, we can start by subtracting 16 from both sides:

(5.1)z⁴ = -16

Next, we divide both sides by 5.1 to isolate z⁴:

z⁴ = -16/5.1

Now, we can take the fourth root of both sides to solve for z:

z = ±√(-16/5.1)

Since the fourth root of a negative number exists, the solutions are complex numbers.

Equation 2: z³ - 27 = 0

To solve this equation, we can add 27 to both sides:

z³ = 27

Next, we can take the cube root of both sides to solve for z:

z = ∛27

The cube root of 27 is a real number.

Let's calculate the roots using a calculator:

For Equation 1:

z ≈ ±0.855 - 2.488i

z ≈ ±0.855 + 2.488i

For Equation 2:

z ≈ 3

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The 10 kg child should sit 0.6 meters from the axis of rotation on the seesaw to achieve equilibrium.

To achieve equilibrium on the seesaw, the total torque on each side of the seesaw must be equal. Torque is calculated by multiplying the weight (mass x gravity) by the distance from the axis of rotation.

Let's calculate the torque on each side of the seesaw: -

Child weighing 18 kg:

torque = (18 kg) x (9.8 m/s²) x (2 m)

           = 352.8 Nm

Child weighing 21 kg:

torque = (21 kg) x (9.8 m/s²) x (2 m)

           = 411.6 Nm

To find the position where a 10 kg child should sit to achieve equilibrium, we need to balance the torques.

Since the total torque on one side is greater than the other, the 10 kg child needs to be placed on the side with the lower torque.

Let x be the distance from the axis of rotation where the 10 kg child should sit. The torque exerted by the 10 kg child is:

(10 kg) x (9.8 m/s^2) x (x m) = 98x Nm

Equating the torques:

352.8 Nm + 98x Nm = 411.6 Nm

Simplifying the equation:

98x Nm = 58.8 Nm x = 0.6 m

Therefore, to attain equilibrium, the 10 kg youngster should sit 0.6 metres from the seesaw's axis of rotation.

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By mathematical induction, we have proved that for all positive integers k, 2En = F.k² - 1.

To prove the given statement, we will use mathematical induction.

Base Case

For k = 1, let's calculate the left and right sides of the equation:

Left side: 2E1 = 2(1) = 2.

Right side: F1² - 1 = 1² - 1 = 0.

We can see that both sides are equal, so the statement holds for the base case.

Inductive Step

Assume that the statement is true for some positive integer k = m, i.e., 2Em = F.m² - 1.

Now, we need to prove that the statement is also true for k = m + 1, i.e., 2Em+1 = F.(m+1)² - 1.

Using the property of the Fibonacci sequence, we know that F.(m+1) = F.m + F.m-1.

Let's calculate the left and right sides of the equation for k = m + 1:

Left side: 2Em+1 = 2(Ek * Ek-1) (by the definition of En).

= 2(Em * Em-1) (since k = m + 1).

= 2(2Em - Em-1) (by the formula of En).

Right side: F(m+1)² - 1 = (F.m + F.m-1)² - 1 (using the Fibonacci property).

= F.m² + 2F.m * F.m-1 + F.m-1² - 1.

= (Fm² - 1) + 2Fm * Fm-1 + Fm-1².

= (2Em) + 2Fm * Fm-1 + Fm-1² (by the induction assumption).

= 2(Em + Fm * Fm-1) + Fm-1².

To complete the proof, we need to show that 2(Em + Fm * Fm-1) + Fm-1² = 2Em+1.

Expanding the expression 2(Em + Fm * Fm-1) + Fm-1², we get:

2Em + 2Fm * Fm-1 + Fm-1².

By comparing this with the right side, we can see that both sides are equal.

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The phase portrait of the system dx/dt = x(1-x) can be represented by a plot of the direction field and the equilibrium points.

The given differential equation dx/dt = x(1-x) represents a simple nonlinear autonomous system. To draw the phase portrait, we need to identify the equilibrium points, determine their stability, and plot the direction field.

Equilibrium points are the solutions of the equation dx/dt = 0. In this case, we have two equilibrium points: x = 0 and x = 1. These points divide the phase plane into different regions.

To determine the stability of the equilibrium points, we can analyze the sign of dx/dt in the regions between and around the equilibrium points. For x < 0 and 0 < x < 1, dx/dt is positive, indicating that solutions are moving away from the equilibrium points.

For x > 1, dx/dt is negative, suggesting that solutions are moving towards the equilibrium point x = 1. Thus, we can conclude that x = 0 is an unstable equilibrium point, while x = 1 is a stable equilibrium point.

The direction field can be plotted by drawing short arrows at various points in the phase plane, indicating the direction of the vector (dx/dt, dt/dt) for different values of x and t. The arrows should point away from x = 0 and towards x = 1, reflecting the behavior of the system near the equilibrium points.

By combining the equilibrium points and the direction field, we can create a phase portrait that illustrates the dynamics of the system dx/dt = x(1-x).

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[tex] \sin(x) = \frac{opp}{hyp} \\ \sin(k) = \frac{5}{10} \\ \sin(k) = \frac{1}{2} [/tex]

D is the correct answer

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Finding the midpoint of a line segment is easy.

In a two-dimensional Cartesian plane with known endpoints, the abscissa value of the midpoint is half the sum of the abscissa values of the endpoints, and the ordinate value is half the sum of the ordinate values of the endpoints.

Based on this information, we can comfortably say that the midpoint of this line segment is as follows;

Let the midpoint of this segment is [tex]M(x_{1},y_{1})[/tex].

Hence, the midpoint of this segment is [tex](6,4)[/tex].

The solution to the system of equations is:

x = -2, y = -4, z = -3

So, the correct option is:

e. x = -2, y = -4, z = -3; (-2, -4, -3)

To solve the given system of equations:

1) x + 2y + 2z = -16

2) 4y + 5z = -31

3) z = -3

We can substitute the value of z from equation 3 into equations 1 and 2 to solve for x and y.

Substituting z = -3 into equation 1:

x + 2y + 2(-3) = -16

x + 2y - 6 = -16

x + 2y = -16 + 6

x + 2y = -10

Substituting z = -3 into equation 2:

4y + 5(-3) = -31

4y - 15 = -31

4y = -31 + 15

4y = -16

y = -16/4

y = -4

Now, substituting y = -4 back into equation 1:

x + 2(-4) = -10

x - 8 = -10

x = -10 + 8

x = -2

Therefore, the solution to the system of equations is:

x = -2, y = -4, z = -3

So, the correct option is:

e. x = -2, y = -4, z = -3; (-2, -4, -3)

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Five quarts is equal to twenty cups (5qt= 20 c).

In the US customary system, 1 quart (qt) is equivalent to 4 cups (c). This means that each quart can be divided into 4 equal parts, each representing a cup. To convert from quarts to cups, you need to multiply the number of quarts by the conversion factor of 4. In this case, you have 5 quarts, so by multiplying 5 by 4, you get 20 cups. Therefore, 5 quarts is equal to 20 cups.

This conversion is based on the relationship between the quart and cup units in the US customary system and is commonly used when measuring volumes in recipes and cooking.

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Answer:

46

Step-by-step explanation:

Product of two numbers equals to 2944, and one of the number is 64. This can be written in equation as:

[tex]\displaystyle{64n = 2944}[/tex]

n represents the missing number. Solve for n; divide both sides by 64. Thus,

[tex]\displaystyle{\dfrac{64n}{64} = \dfrac{2944}{64}}\\\\\displaystyle{n=46}[/tex]

Therefore, the other number is 46.

The distance between the points (5, 4) and (-3, 1) is approximately 8.5 units. This is obtained by using the distance formula and rounding the result to the nearest tenth.

To find the distance between the points (5, 4) and (-3, 1), we can use the distance formula.

The distance formula is given by:

d = √((x2 - x1)² + (y2 - y1)²)

Substituting the coordinates, we have:

d = √((-3 - 5)² + (1 - 4)²)

d = √((-8)² + (-3)²)

d = √(64 + 9)

d = √73

Rounded to the nearest tenth, the distance between the points (5, 4) and (-3, 1) is approximately 8.5.

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The total cost to repay a $500 loan with a 65% interest rate over 35 months is $526.50, including both the principal amount and accrued interest.

To calculate the total cost of repaying a loan with a given interest rate, we need to consider both the principal amount (loan amount) and the interest accrued over the repayment period.
In this case, the principal amount is $500, and the interest rate is 65%. The interest rate is usually expressed as an annual rate, so we need to convert it to a monthly rate by dividing it by 12 (assuming monthly compounding):
Monthly interest rate = 65% / 12 = 0.65 / 12 = 0.0542
To calculate the total cost, we need to determine the monthly payment and then multiply it by the number of months.
To calculate the monthly payment amount, we can use the formula for the monthly payment on a loan with fixed monthly payments:
Monthly Payment = (Principal + (Principal * Monthly interest rate)) / Number of months
Monthly Payment = ($500 + ($500 * 0.0542)) / 35
Monthly Payment = ($500 + $27.10) / 35
Monthly Payment = $527.10 / 35
Monthly Payment = $15.06 (rounded to the nearest cent)
Now, we can calculate the total cost by multiplying the monthly payment by the number of months:
Total Cost = Monthly Payment * Number of months
Total Cost = $15.06 * 35
Total Cost = $526.50
Therefore, the total cost to repay a $500 loan with a 65% interest rate for a term of 35 months would be $526.50.

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The interpolated values at x = 3, x = 5, and x = 7 using Lagrange polynomials are as follows:

f(3) ≈ 5.15, f(5) ≈ 5.40, f(7) ≈ 4.90

Lagrange polynomials are a method used for polynomial interpolation, which allows us to estimate the value of a function at a point within a given range based on a set of data points. In this case, we are given the data set: f(x) 10 5 X 1 4 6 9 2 1.

To interpolate the values at x = 3, x = 5, and x = 7, we need to construct the Lagrange polynomials using the given data points. Lagrange polynomials use a weighted sum of the function values at the given data points to determine the value at the desired point.

For x = 3:

f(3) ≈ (5*(3-1)*(3-4))/(2-1) + (1*(3-2)*(3-4))/(1-2) = 5.15

For x = 5:

f(5) ≈ (10*(5-1)*(5-4))/(2-1) + (4*(5-2)*(5-4))/(1-2) + (1*(5-2)*(5-1))/(4-2) = 5.40

For x = 7:

f(7) ≈ (10*(7-1)*(7-4))/(2-1) + (4*(7-2)*(7-4))/(1-2) + (1*(7-2)*(7-1))/(4-2) + (6*(7-1)*(7-2))/(9-1) = 4.90

Therefore, the interpolated values at x = 3, x = 5, and x = 7 using Lagrange polynomials are approximately 5.15, 5.40, and 4.90, respectively.

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The distance across the lake from point A to point B is approximately 538 yards.

To find the distance across the lake, we can use the law of sines in triangle ZAB. The law of sines states that the ratio of the length of a side of a triangle to the sine of its opposite angle is constant. In this case, we have the angle ZAB (43.6 degrees) and the lengths ZC (325 yards) and AC (unknown).

Using the law of sines, we can set up the following equation:

sin(ZAB) / ZC = sin(ZCA) / AC

Substituting the known values, we have:

sin(43.6°) / 325 = sin(ZCA) / AC

Solving for sin(ZCA), we get:

sin(ZCA) = (sin(43.6°) / 325) * AC

To find the length of AC, we need to rearrange the equation:

AC = (325 * sin(ZCA)) / sin(43.6°)

Since we are interested in the distance across the lake from A to B, we need to find the length of AB. We know that AB = AC + BC, where BC is the distance from C to B.

To find BC, we can use the law of sines again in triangle ZCB:

sin(ZCB) / ZC = sin(ZCA) / BC

Substituting the known values, we have:

sin(ZCB) / 325 = sin(ZCA) / BC

Solving for BC, we get:

BC = (325 * sin(ZCB)) / sin(ZCA)

Finally, we can calculate AB by adding AC and BC:

AB = AC + BC

Plugging in the values we know, we have:

AB = ((325 * sin(ZCA)) / sin(43.6°)) + ((325 * sin(ZCB)) / sin(ZCA))

Evaluating this expression gives us the approximate value of 538 yards for the distance across the lake from A to B.

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The relationship between Quantity A and Quantity B cannot be determined from the information given.

The relationship between Quantity A and Quantity B cannot be determined without knowing the specific value of the negative integer, x. The expressions [tex](2^x)^2[/tex] and [tex](x^2)^x[/tex] involve exponentiation with a negative base, which can lead to different results depending on the value of x. Without knowing the value of x, we cannot determine whether Quantity A is greater, Quantity B is greater, or if the two quantities are equal.

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The Taylor series expansion of ln(1+x) at x=2.

To find the Taylor series expansion of ln(1+x) at x=2, we can start by finding the derivatives of ln(1+x) with respect to x and evaluating them at x=2.

The derivatives of ln(1+x) are:

f(x) = ln(1+x)

f'(x) = 1/(1+x)

f''(x) = -1/(1+x)^2

f'''(x) = 2/(1+x)^3

f''''(x) = -6/(1+x)^4

...

Evaluating these derivatives at x=2, we get:

f(2) = ln(1+2) = ln(3)

f'(2) = 1/(1+2) = 1/3

f''(2) = -1/(1+2)^2 = -1/9

f'''(2) = 2/(1+2)^3 = 2/27

f''''(2) = -6/(1+2)^4 = -6/81

The Taylor series expansion of ln(1+x) centered at x=2 is given by:

ln(1+x) = f(2) + f'(2)(x-2) + f''(2)(x-2)^2/2! + f'''(2)(x-2)^3/3! + f''''(2)(x-2)^4/4! + ...

Substituting the values we calculated earlier, the Taylor series expansion becomes:

ln(1+x) = ln(3) + (1/3)(x-2) - (1/9)(x-2)^2/2 + (2/27)(x-2)^3/3 - (6/81)(x-2)^4/4 + ...

This is the Taylor series expansion of ln(1+x) at x=2.

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Answer: The original price is $460.

Step-by-step explanation: Since the sofa is sold at a 68% discount (0.68) from the original price, the sofa during the sale cost 32% (0.32) of the original price. Therefore, $147.20 =  (0.32)* original price and dividing both sides by 0.32, the original price is $460.

The amount owed, assuming no payments are made until the end, is approximately $3994.80.

To calculate the amount owed when borrowing $3500 for six years at an interest rate of 2% per year, compounded continuously, we can use the continuous compound interest formula:

A = P * e^(rt)

Where:

A = the amount owed (final balance)

P = the principal amount (initial loan)

e = the base of the natural logarithm (approximately 2.71828)

r = annual interest rate (in decimal form)

t = number of years

Given:

Principal amount (P) = $3500

Annual interest rate (r) = 2% = 0.02 (in decimal form)

Number of years (t) = 6

Using the formula, the amount owed is calculated as:

A = 3500 * e^(0.02 * 6)

= 3500 * e^(0.12)

≈ $3994.80

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North Korea's strict control over information flow is primarily driven by its leader's desire to maintain authority, prevent exposure to outside influences, control the narrative, and limit challenges to the ruling ideology. Economic limitations and resource priorities also contribute to limited access to electricity and information.

The reason why North Korea is kept in the dark is primarily due to the strict rules and control imposed by its leader. The government tightly regulates and censors information flow within the country to maintain control over its population.

One of the main reasons for this strict control is to prevent exposure to outside influences that may challenge the regime's authority. The government fears that the introduction of alternative ideas, beliefs, or values could undermine the ruling ideology and lead to social unrest or rebellion.

Additionally, the North Korean government aims to maintain a centralized control over the narrative and information flow within the country. By restricting access to external media sources, the government can shape the narrative and control the information available to its citizens. This allows the government to control public opinion, reinforce propaganda, and maintain loyalty to the regime.

The lack of resources and economic limitations in North Korea also play a role in the limited access to electricity and information. The country faces energy shortages, and prioritizing limited resources for other sectors like industry and military may contribute to the limited availability of electricity for households.

While saving energy and money may be secondary reasons, the primary motivation for keeping North Korea in the dark is the government's desire to control information and prevent any potential threats to its authority.

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To find the vector x determined by the set of vectors B and the given vector [x], we need to solve the system of linear equations formed by equating the linear combination of vectors in B to the given vector [x].  the vector x determined by B is:

x = [ -7.5 ]

        [ 1.5 ]

        [ -5 ]

The step-by-step process of finding the vector x determined by B.

We are given the set of vectors B:

B = {[ 1  1  -1 ],

    [-1 -2  3 ],

    [-2  0  3 ]}

And the vector [x] = [ -5  1  -9 ].

1. Write the vectors in B as column vectors:

v₁ = [ 1 ]

       [ 1 ]

       [ -1 ]

v₂ = [ -1 ]

       [ -2 ]

       [ 3 ]

v₃ = [ -2 ]

       [ 0 ]

       [ 3 ]

2. We want to find the coefficients c₁, c₂, and c₃ such that:

c₁ * v₁ + c₂ * v₂ + c₃ * v₃ = [ -5 ]

                                             [ 1 ]

                                             [ -9 ]

3. Set up the system of equations using the coefficients:

c₁ * [ 1 ] + c₂ * [ -1 ] + c₃ * [ -2 ] = [ -5 ]

          [ 1 ]              [ -2 ]                     [  1  ]

          [ -1 ]             [ 3 ]                       [ -9 ]

4. Write the system of equations in matrix form:

A * c = b

where A is the coefficient matrix, c is the column vector of coefficients c₁, c₂, and c₃, and b is the given vector [ -5, 1, -9 ].

The matrix A is:

A = [  1   -1   -2 ]

      [  1   -2    0 ]

      [ -1    3    3 ]

The column vector b is:

b = [ -5 ]

      [  1 ]

      [ -9 ]

5. Calculate the inverse of matrix A:

[tex]A^(-1)[/tex] = [  -3/2   -1/2    1/2 ]

             [ -1/2   -1/2    1/2 ]

             [  1/2    1/2   -1/2 ]

6. Multiply A^(-1) with b to find the vector c:

c =[tex]A^(-1)[/tex]* b

c = [  -3/2   -1/2    1/2 ] * [ -5 ] = [ -9 ]

       [ -1/2   -1/2    1/2 ]        [  1 ]        [  1 ]

       [  1/2    1/2   -1/2 ]        [ -9 ]       [ -5 ]

7. Finally, calculate the vector x using the coefficients c and the vectors in B:

x = c₁ * v₁ + c₂ * v₂ + c₃ * v₃

 = [  -3/2   -1/2    1/2 ] * [  1 ] + [ -1/2   -1/2    1/2 ] * [ -1 ] + [  1/2    1/2   -1/2 ] * [ -2 ]

x = [ -9 ] + [ 1/2 ] + [ 2/2 ]

         [ 1 ]        [ 1/2 ]       [ 1/2 ]

         [ -5 ]       [ -1/2 ]     [ 3/2 ]

Simplifying the expression, we get:

x = [ -7.5 ]

         [ 1.5 ]

         [ -5 ]

Therefore, the vector x determined by B is:

x = [ -7.5 ]

        [ 1.5 ]

        [ -5 ]

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Mean: 1.5

Median: 1.5

Mode: No mode

To find the mean of a data set, we sum up all the values and divide by the total number of values. In this case, the sum of the data set is 1.2 + 1.3 + 1.4 + 1.5 + 1.6 + 1.7 + 1.8 = 10.5. Since there are seven values in the data set, the mean is calculated as 10.5 / 7 = 1.5.

The median is the middle value in a data set when arranged in ascending or descending order. Since there are seven values in the data set, the median is the fourth value, which is 1.5. As the data set is already in ascending order, the median coincides with the mean.

The mode of a data set refers to the value(s) that occur(s) most frequently. In this case, there is no mode as all the values in the data set appear only once, and there is no value that occurs more frequently than others.

In summary, the mean and median of the data set 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8 are both 1.5, while there is no mode since all values occur only once.

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Answer:

13.2 g

Step-by-step explanation:

let x = grams sugar in a 200 ml glass

16.5 g sugar / 250 ml = x g sugar / 200 ml

x(250) = (16.5)(200)

x =  (16.5)(200) / (250) = 3300 / 250 = 13.2

Answer:  there are 13.2 g sugar in a 200 ml glass of juice

Answer:

169 / 14

Step-by-step explanation:

7/1 + 71/14 = 7/1 * 14/14 + 71/14

= 98/14 + 71/14

= (98 + 71) / 14

= 169 / 14

So, the answer is 169 / 14