Express the first trigonometric function in terms of the second. cotθ, sinθ

The value of electric current best describing the given values of Power and Resistance is 2 Amperes.

The electric current is defined as the flow of electric charge across the conductor or current carrying wire.

We will keep the values of power and resistance in the provided formula to find the electric current.

I = ✓100/5

Beginning with taking the square of 100 at numerator on Right Hand Side of the equation

I = 10/5

Performing division on Right Hand Side of the equation to find the value of current

I = 2 Amperes

Hence, the value of electric current is 2 Amperes.

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The quadratic equation 2x² + 3x - 4 = 0 can be solved using the quadratic formula.

To solve the equation 2x² + 3x - 4 = 0 using the quadratic formula, we need to identify the coefficients of the quadratic terms. In this case, the coefficient of x² is 2, the coefficient of x is 3, and the constant term is -4.

The quadratic formula states that for an equation of the form ax² + bx + c = 0, the solutions for x can be found using the formula:

x = (-b ± √(b² - 4ac)) / (2a)

Applying this formula to our equation, we have:

a = 2, b = 3, and c = -4.

Substituting these values into the quadratic formula, we get:

x = (-3 ± √(3² - 4 * 2 * -4)) / (2 * 2)

Simplifying further:

x = (-3 ± √(9 + 32)) / 4

x = (-3 ± √41) / 4

Therefore, the solutions to the equation 2x² + 3x - 4 = 0 are given by x = (-3 + √41) / 4 and x = (-3 - √41) / 4.

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The solutions to the equation 7x²-x-12=0 are x=2 and x=-1.71 (rounded to the nearest hundredth). These solutions are obtained by factoring the quadratic equation or using the quadratic formula to find the roots.


To solve the quadratic equation 7x²-x-12=0, we can use factoring or the quadratic formula. Factoring this equation may be challenging, so let’s use the quadratic formula: x=(-b±√(b²-4ac))/(2a).
For this equation, a=7, b=-1, and c=-12. Plugging these values into the quadratic formula, we get x=(-(-1)±√((-1)²-4(7)(-12)))/(2(7)).

Simplifying further, we have x=(1±√(1+336))/14, which becomes x=(1±√337)/14. Rounding the solutions to the nearest hundredth, we find x=2 and x=-1.71.
Therefore, the solutions to the equation 7x²-x-12=0 are x=2 and x=-1.71 (rounded to the nearest hundredth).

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The solution to the equation x = 1/2 [(180-64)] is x = 58.

To solve the equation x = 1/2 [(180-64)], we can follow these steps:

1. Simplify the expression inside the square brackets:

  180 - 64 = 116

2. Multiply the result by 1/2:

  116 * 1/2 = 58

So, the solution to the equation x = 1/2 [(180-64)] is x = 58.

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The sentence is false. The correct sentence to make it true would be: "If a parallelogram is a rectangle, then the diagonals are equal in length."

In a parallelogram, opposite sides are parallel, and in a rectangle, all angles are right angles. However, being a rectangle does not necessarily guarantee that the diagonals are congruent (i.e., of equal length).

In a rectangle, the diagonals are indeed equal in length because the opposite sides are congruent and the diagonals bisect each other at right angles. This property holds true specifically for rectangles.

On the other hand, in a general parallelogram, the diagonals bisect each other but may not necessarily have the same length. Therefore, the original statement, "If a parallelogram is a rectangle, then the diagonals are congruent," is false.

By modifying the statement to say, "If a parallelogram is a rectangle, then the diagonals are equal in length," it accurately reflects the property specific to rectangles, where the diagonals are indeed equal.

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The solution to the matrix equation is [x; y] = [16; -22].

To solve the matrix equation [2 1; 4 3] [x; y] = [10; -2], we can use matrix algebra.

To find the inverse, we the determinant of the coefficient matrix:

det([2 1; 4 3]) = (2 * 3) - (1 * 4) = 6 - 4 = 2

Since the determinant is non-zero (2 ≠ 0), the coefficient matrix has an inverse.

Next, we find the inverse of the coefficient matrix:

[2 1; 4 3]⁻¹ = (1/det([2 1; 4 3]))  [3 -1; -4 2]

           = (1/2)  [3 -1; -4 2]

           = [3/2 -1/2; -2 1]

Now,[x; y] = [3/2 -1/2; -2 1] [10; -2]

      = [3/2 * 10 + (-1/2) * (-2); -2 * 10 + 1 * (-2)]

      = [15 + 1; -20 - 2]

      = [16; -22]

Therefore, the solution to the matrix equation is [x; y] = [16; -22].

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The criterion used to obtain the ordinary least square (OLS) estimator is to minimize the sum of the squared differences between the observed values and the predicted values.

In OLS, the goal is to find the line that best fits the given data points. The estimator minimizes the sum of the squared residuals, which are the differences between the observed values and the predicted values. The squared residuals are used to ensure that both positive and negative differences contribute to the overall error measure.

The OLS estimator achieves this by calculating the coefficients of the linear regression model that minimize the sum of the squared residuals. It finds the intercept and slope of the line that minimizes the total squared distance between the data points and the regression line. This minimization process is based on the principle of least squares, which aims to find the best-fitting line by minimizing the overall error.

By minimizing the sum of the squared residuals, the OLS estimator provides a measure of how well the regression line represents the data points. It allows for the determination of the line's slope and intercept, which can be used for predicting values and understanding the relationship between the variables.

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The x component of the displacement is incorrect and needs to be recalculated. The y component of the displacement can be determined using trigonometry.

To find the x component of the displacement, we need to determine the horizontal distance covered in the given direction. The angle of 153 degrees above the positive x-axis suggests that the direction deviates from the positive x-axis in a counterclockwise direction. Since the angle is measured from the positive x-axis, it falls in the second quadrant.

To calculate the x component, we can use trigonometry. The x component is given by the formula:

x = displacement * cos(angle)

In this case, the displacement is 75 m, and the angle is 153 degrees. Converting the angle to radians (since trigonometric functions in most programming languages use radians), we have:

x = 75 m * cos(153°) = -71.61 m (rounded to two significant figures)

Therefore, the x component of the displacement is -71.61 m.

For Part B, to determine the y component of the displacement, we again use trigonometry. The y component is given by the formula:

y = displacement * sin(angle)

Using the same values as before, we have:

y = 75 m * sin(153°) = 43.50 m (rounded to two significant figures)

Therefore, the y component of the displacement is 43.50 m.

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To maximize his profit, Robby should make 40 brownies and 40 cookies.


To determine the optimal number of brownies and cookies that Robby should make, we need to consider the cost and profit associated with each dessert.

Let's analyze the cost first:
The cost of making each brownie is $0.10, and the cost of making each cookie is $0.05. Since Robby has a budget of $6 to spend on ingredients, we can set up the following equation to represent the cost constraint:
0.10x + 0.05y ≤ 6
where x represents the number of brownies and y represents the number of cookies.

Next, let's consider the profit:
Robby makes a profit of $0.25 on each brownie and $0.20 on each cookie. We want to maximize the profit, so the objective function is:
Profit = 0.25x + 0.20y

To find the optimal solution, we need to maximize the profit while satisfying the cost constraint. This can be achieved through linear programming techniques or graphical methods. However, in this case, we can observe that both the profit and the cost are linear functions, and the constraint is a straight line.

By examining the constraint equation and the profit equation, we can see that the maximum profit occurs when the constraint is met with equality (i.e., when Robby uses all of his budget). Thus, we can set up the following equations:
0.10x + 0.05y = 6 (cost constraint)
0.25x + 0.20y = profit

By solving these equations, we find that x = 40 and y = 40. Therefore, to maximize his profit, Robby should make 40 brownies and 40 cookies.

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The composition function (f∘g)(x) is equal to x²-4x+5, which means the correct answer is option a .[tex]x^{2} - 4 x+5.[/tex]

To find (f∘g)(x), we need to substitute g(x) into f(x), resulting in f(g(x)). Given that g(x) = x−2, we substitute x−2 into f(x) as follows:

f(g(x)) = f(x−2) = (x−2)² + 1

Expanding the squared term, we have:

f(g(x)) = x² - 4x + 4 + 1

Simplifying further, we obtain:

f(g(x)) = x²-4 x+5.

Therefore, the correct answer is (f∘g)(x) = x²-4 x+5, which corresponds to option a. This means that the composition of functions f and g, when applied to x, results in the polynomial x²-4 x+5.

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Using trend-adjusted exponential smoothing with alpha = 0.1 and beta = 0.2, the forecast for the architectural firm's August income is $94.92 thousand dollars. The mean squared error (MSE) for this forecast is 2.12 [tex](thousand dollars)^2[/tex].

Trend-adjusted exponential smoothing combines exponential smoothing with a trend adjustment factor. The forecast for a given period is calculated based on the previous forecast and the previous trend value. In this case, the initial forecast for February is given as $85.0 thousand dollars, and the initial trend adjustment is 0.

To calculate the forecast for each month, we use the following formulas:

Level forecast = Previous level forecast + Previous trend adjustment

Trend forecast = Previous trend forecast + Beta * (Current level forecast - Previous level forecast)

Forecast for next period = Level forecast + Trend forecast

Using these formulas, we can calculate the forecasts for each month from February to July. Then, for August, we can apply the trend adjustment formula using the previous level forecast and trend forecast. The resulting forecast for August is $94.92 thousand dollars.

The mean squared error (MSE) is a measure of the accuracy of the forecast. It is calculated by taking the average of the squared differences between the actual income values and the forecasted values. In this case, the MSE for the forecast developed using trend-adjusted exponential smoothing is 2.12 [tex](thousand dollars)^2[/tex]. A lower MSE indicates a better fit between the forecast and the actual data.

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Answer:Your mum

Step-by-step explanation::)

The correct answer is option b:

X'(1,5), Y'(-3,-5), Z'(3,-1)

To reflect a point across the line y=x, we need to swap the x-coordinate with the y-coordinate of each point.

Given the points:

X(5,1), Y(-5,-3), and Z(-1,3)

When reflecting across the line y=x, the new coordinates will be:

X' = (1, 5)

Y' = (-3, -5)

Z' = (3, -1)

Comparing the reflected coordinates with the given options:

a. X'(-5,-1), Y'(5,3), Z'(1,-3) -> Not correct.

b. X'(1,5), Y'(-3,-5), Z'(3,-1) -> Correct.

c. X'(-1,-5), Y'(3,5), Z'(-3,1) -> Not correct.

d. X'(5,1), Y'(-5,-3), Z'(-1,3) -> Not correct.

The correct answer is option b:

X'(1,5), Y'(-3,-5), Z'(3,-1)

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The value of sin 3[tex]0^\circ[/tex] is equal to 1/2 in fractions and 0.5 in decimals.

We are given that we have to use a special right triangle to express the given trigonometric ratio both in fractions and as a decimal to the nearest hundredth. We will split the special equilateral triangle into two right triangles as shown in the image below.

Now, we can find out the value of a given trigonometric ratio with the help of these triangles. The angle we have to consider is 3[tex]0^\circ[/tex]. So the perpendicular will be the opposite side of that angle. Therefore, the value of the perpendicular is 1.

sin 30 = Perpendicular/Hypotenuse

Perpendicular = 1

Base = 2

Substituting the values;

sin 30 = 1/2

In fraction, sin 30 = 1/2. If we convert it to decimal, we get;

1/2 = 0.5

In decimal, sin 30 = 0.5

Therefore, the value of sin 3[tex]0^\circ[/tex] is equal to 1/2 in fractions and 0.5 in decimals.

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No, there is no closure property of subtraction that applies to whole numbers.

We have,

The closure property states that when you perform an operation on two numbers from a certain set, the result will always be within that same set. In the case of subtraction, if the closure property were to hold, it would mean that when you subtract two whole numbers, the result would always be a whole number.

However, this is not true for all cases of subtraction with whole numbers. For example, if you subtract a larger whole number from a smaller whole number, the result can be a negative number, which is not a whole number.

For instance, if you subtract 5 from 3, you get -2, which is not a whole number.

Since not all subtractions of whole numbers result in whole numbers, the closure property does not hold for subtraction in the set of whole numbers.

Thus,

No, there is no closure property of subtraction that applies to whole numbers.

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The first and second derivatives do affect whether the trapezoidal rule overestimates or underestimates the area.

In general, the trapezoidal rule is a numerical integration method that approximates the area under a curve by dividing it into trapezoids. The rule assumes that the curve between two points can be approximated by a straight line segment. If the curve is concave up (meaning its second derivative is positive), the trapezoidal rule tends to underestimate the area. Conversely, if the curve is concave down (meaning its second derivative is negative), the trapezoidal rule tends to overestimate the area.

To understand why this happens, let's consider a concave up curve. In this case, the second derivative is positive, indicating that the curve is increasing at an increasing rate. When the trapezoidal rule approximates the curve by straight line segments, it "cuts off" some of the area under the curve, resulting in an underestimate.

On the other hand, for a concave down curve, the second derivative is negative, indicating that the curve is decreasing at an increasing rate. In this scenario, the trapezoidal rule "extends" the curve beyond its actual shape, leading to an overestimate of the area.

It's important to note that the accuracy of the trapezoidal rule depends on the number of trapezoids used and the spacing between them. With a large number of trapezoids or smaller spacing, the approximation tends to be more accurate regardless of the curvature of the curve.

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The z-score of a value that is 2.08 standard deviations greater than the mean is 2.08.

To find the z-score of a value that is 2.08 standard deviations greater than the mean, we can use the formula for z-score:

z = (x - μ) / σ

where x is the given value, μ is the mean, and σ is the standard deviation.

We are given that the value is 2.08 standard deviations greater than the mean. This means that the distance between the value and the mean is 2.08 times the standard deviation. We can represent the value as:

x = μ + (2.08 * σ)

Substituting this into the formula for z-score, we get:

z = ((μ + 2.08σ) - μ) / σ

Simplifying the expression, we get:

z = (2.08 * σ) / σ

The standard deviation terms cancel out, leaving us with:

z = 2.08

Therefore, the z-score of a value that is 2.08 standard deviations greater than the mean is 2.08. A positive z-score indicates that the value is above the mean by a certain number of standard deviations. In this case, the value is 2.08 standard deviations above the mean.

The z-score can be used to determine the relative position of the value within the distribution and to calculate probabilities using the standard normal distribution table.

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The matrix operation D - 2E is defined and can be performed by subtracting twice matrix E from matrix D.

To perform the operation D - 2E, we need to ensure that the matrices D and E have compatible dimensions. The matrices must have the same number of rows and columns.

Assuming matrix D has dimensions m x n and matrix E has dimensions p x q, for the operation D - 2E to be defined, m = p and n = q.

Once the matrices have compatible dimensions, we subtract twice the corresponding elements of matrix E from matrix D. Each element of the resulting matrix is obtained by subtracting the corresponding element of matrix E from the corresponding element of matrix D, multiplied by 2.

For example, if D and E are both 2x2 matrices, the operation D - 2E would be performed as follows:

| d₁₁   d₁₂ |    | e₁₁   e₁₂ |    | d₁₁ - 2e₁₁   d₁₂ - 2e₁₂ |

| d₂₁   d₂₂ | -  | e₂₁   e₂₂ | =  | d₂₁ - 2e₂₁   d₂₂ - 2e₂₂ |

The resulting matrix will have the same dimensions as matrices D and E, and its elements will be calculated based on the subtraction of the corresponding elements.

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The inverse of the function f(x) = 3x + 5/2 is f⁻¹(x) = (2/3)x - 5/3 i.e, option(D)

To find the inverse of a function, we need to switch the roles of x and y and solve for y. Let's start with the original function:

f(x) = 3x + 5/2

Switching the roles of x and y, we get:

x = 3y + 5/2

Now, solve for y:

x - 5/2 = 3y

Divide both sides by 3:

(x - 5/2) / 3 = y

Simplifying the expression:

y = (1/3)(x - 5/2)

To make it more convenient, we can rewrite (1/3)(x - 5/2) as (2/3)x - 5/3:

y = (2/3)x - 5/3

Therefore, the inverse of f(x) = 3x + 5/2 is f⁻¹(x) = (2/3)x - 5/3. So, the correct answer is D.

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For the given sets of demand and supply equations:

(a) Equilibrium price = $12, Equilibrium quantity = 84.

(b) Equilibrium price = $15, Equilibrium quantity = 25.

(c) Equilibrium price = $500, Equilibrium quantity = 3625.

For the demand equation Qd = 96 - P and the supply equation Qs = 7P, we can find the equilibrium price and quantity by setting the quantity demanded equal to the quantity supplied:

Qd = Qs

96 - P = 7P

Combining like terms, we get:

8P = 96

Dividing both sides by 8, we find:

P = 12

Substituting the equilibrium price (P = 12) back into either the demand or supply equation, we can determine the equilibrium quantity:

Qd = 96 - P

Qd = 96 - 12

Qd = 84

Therefore, the equilibrium price is P = $12 and the equilibrium quantity is Q = 84.

For the demand equation Qd = 70 - 3P and the supply equation Qs = 10 + P, we set Qd equal to Qs:

Qd = Qs

70 - 3P = 10 + P

Combining like terms, we have:

4P = 60

Dividing both sides by 4, we find:

P = 15

Substituting the equilibrium price (P = 15) back into either the demand or supply equation, we can determine the equilibrium quantity:

Qd = 70 - 3P

Qd = 70 - 3(15)

Qd = 70 - 45

Qd = 25

Therefore, the equilibrium price is P = $15 and the equilibrium quantity is Q = 25.

For the demand equation Qd = 4000 - 0.75P and the supply equation Qs = 2000 + 3.25P, we set Qd equal to Qs:

Qd = Qs

4000 - 0.75P = 2000 + 3.25P

Combining like terms, we get:

4P = 2000

Dividing both sides by 4, we find:

P = 500

Substituting the equilibrium price (P = 500) back into either the demand or supply equation, we can determine the equilibrium quantity:

Qd = 4000 - 0.75P

Qd = 4000 - 0.75(500)

Qd = 4000 - 375

Qd = 3625

Therefore, the equilibrium price is P = $500 and the equilibrium quantity is Q = 3625.

These values represent the price and quantity at which the quantity demanded equals the quantity supplied, indicating market equilibrium.

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The apothem of a polygon is the perpendicular distance between the center of the polygon and any side of the polygon is False statement.

The apothem of a polygon is the perpendicular distance between the center of the polygon and any side of the polygon.

The apothem is not the perpendicular distance between any two parallel bases.

In a polygon, the bases are usually referred to as the top and bottom sides of the polygon (for example, in a trapezoid). The apothem, however, is a measurement from the center of the polygon to any side, and it is always perpendicular to that side.

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In the two-column proof above, we start with the given information that ΔMLP is an isosceles triangle and that N is the midpoint of side MP. Then, using definitions and properties of congruent triangles, we prove that LN is perpendicular to MP.

The key steps in the proof include recognizing LN as a perpendicular bisector, establishing congruence between ΔNLP and ΔNPL, and concluding that ∠NLP and ∠NPL are right angles, thus demonstrating the perpendicular relationship between LN and MP.

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Answer:

So the missing pairs would be "GK, FD, and EC."

Explanation:

We can observe that the first letter of each pair follows a consecutive alphabetical order, while the second letter of each pair follows a reverse alphabetical order.

For the given manufacturing process of piston rings, the control limits for the X-bar chart are approximately LCL_X-bar = 33.98675 and UCL_X-bar = 34.01325. The control limits for the R chart are LCL_R = 0 and UCL_R ≈ 0.05536.

To calculate the Lower Control Limit (LCL) and Upper Control Limit (UCL) for the X-bar chart and R chart manually, we need the following formulas:

For X-bar chart:

LCL_X-bar = X-double-bar – A2 * R-bar / √n

UCL_X-bar = X-double-bar + A2 * R-bar / √n

For R chart:

LCL_R = D3 * R-bar

UCL_R = D4 * R-bar

Given the information you provided, let’s calculate the control limits for the X-bar and R charts manually.

1. X-bar Chart:

Number of samples (n) = 25

Number of observations per sample = 5

Sum of sample means (∑x-bar) = 850

Sum of individual ranges (∑R) = 0.581

First, calculate the X-double-bar (mean of means):

X-double-bar = ∑x-bar / n

X-double-bar = 850 / 25

X-double-bar = 34

Next, calculate the R-bar (average range):

R-bar = ∑R / (n – 1)

R-bar = 0.581 / (25 – 1)

R-bar = 0.581 / 24

R-bar = 0.02421

The constants A2, D3, and D4 depend on the subgroup size (n). For n = 5, the values are:

A2 = 0.577

D3 = 0

D4 = 2.282

Now, calculate the control limits for the X-bar chart:

LCL_X-bar = X-double-bar – A2 * R-bar / √n

LCL_X-bar = 34 – 0.577 * 0.02421 / √5

LCL_X-bar = 34 – 0.01325

LCL_X-bar ≈ 33.98675

UCL_X-bar = X-double-bar + A2 * R-bar / √n

UCL_X-bar = 34 + 0.577 * 0.02421 / √5

UCL_X-bar = 34 + 0.01325

UCL_X-bar ≈ 34.01325

The control limits for the X-bar chart are approximately LCL_X-bar = 33.98675 and UCL_X-bar = 34.01325.

2. R Chart:

Using the values of R-bar, D3, and D4 calculated previously:

LCL_R = D3 * R-bar

LCL_R = 0 * 0.02421

LCL_R = 0

UCL_R = D4 * R-bar

UCL_R = 2.282 * 0.02421

UCL_R ≈ 0.05536

The control limits for the R chart are LCL_R = 0 and UCL_R ≈ 0.05536.

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We would need to sell at least $100,000 of jewelry each year for Option A to produce a larger income than Option B.

To determine the minimum sales required for Option A to produce a larger income than Option B, we can set up the following equation:

15,000 + 0.11x > 21,000 + 0.05x

Where x represents the amount of jewelry sales in dollars.Let's solve the equation to find the minimum sales required:

0.11x - 0.05x > 21,000 - 15,000

0.06x > 6,000

x > 6,000 / 0.06

x > 100,000

Therefore, you would need to sell at least $100,000 of jewelry each year for Option A to produce a larger income than Option B.

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The positive root of the given polynomial is 2.

Given is a polynomial -5x³ - 2x² + 9x + 30 = 0, we need to find the positive root of the polynomial,

Simplifying the polynomial,

[tex]-\left(x-2\right)\left(5x^2+12x+15\right)=0[/tex]

Using the zero-factor principal,

[tex]x-2=0\quad \mathrm{or}\quad \:5x^2+12x+15=0[/tex]

[tex]x-2=0:\quad x=2[/tex]

[tex]5x^2+12x+15=0:\quad x=-\frac{6}{5}+i\frac{\sqrt{39}}{5},\:x=-\frac{6}{5}-i\frac{\sqrt{39}}{5}[/tex]

Therefore, the zeros are =

[tex]x=2,\:x=-\frac{6}{5}+i\frac{\sqrt{39}}{5},\:x=-\frac{6}{5}-i\frac{\sqrt{39}}{5}[/tex]

Hence the positive root of the given polynomial is 2.

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The correct algebra statement is written as:  Option C: The second anthill is 1¹/₃ times as many than the first anthill

Algebraic word problems are problems that require converting a sentence into an equation and solving that equation. The equations that need to be written contain only basic arithmetic. and a single variable. Usually in real-life scenarios variables represent unknown quantities.

We are told that she has two anthills.

Number of ants in anthill 1 = 982 ants

Number of ants in anthill 2 = 1¹/₃ * 982

Thus:

The second anthill is 1¹/₃ times as many than the first anthill

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A tangent function does not have an amplitude. The amplitude of a periodic function is the distance between its maximum and minimum values.

The tangent function does not have a maximum or minimum value, so it does not have an amplitude. The tangent function oscillates between -∞ and ∞, meaning that it can take on any real number value. This is because the tangent function is defined as the ratio of the sine and cosine functions, which are both periodic functions with an amplitude of 1.

The graph of a tangent function is a sawtooth wave that never reaches a maximum or minimum value. This is because the tangent function is not periodic in the same way that sine and cosine functions are. Sine and cosine functions have a period of 2π, which means that they repeat their values after a horizontal shift of 2π. The tangent function, on the other hand, has a period of π, which means that it repeats its values after a horizontal shift of π.

In conclusion, the tangent function does not have an amplitude because it does not have a maximum or minimum value.

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To find the value of x that makes the vectors a = -xi + 3j and b = 3i - j parallel to each other, we need to check if the ratio of their corresponding components is the same. In this case, we compare the x-component of a to the x-component of b and set them equal to each other to solve for x.

We have two vectors, a = -xi + 3j and b = 3i - j. For two vectors to be parallel, their corresponding components must have the same ratio. In this case, we compare the x-components of a and b.

The x-component of vector a is -x, and the x-component of vector b is 3. To make these vectors parallel, we need to find the value of x that satisfies the condition -x/3 = 1, where the ratio of the x-components is 1.

We can solve this equation for x by multiplying both sides by 3, which gives -x = 3. Then, we multiply both sides by -1 to isolate x, resulting in x = -3.

Therefore, the value of x that makes the vectors a = -xi + 3j and b = 3i - j parallel to each other is x = -3. When x is equal to -3, the ratio of the x-components of the vectors is 1, indicating that they are parallel.

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In the given diagram of right triangle EFG, we have a right triangle with right angle at F. The altitude FH is drawn from the vertex F to the hypotenuse EG, intersecting at point H.

We are given that FH = 9 and EF = 15. We need to determine the length of EG.

First, let's consider the properties of altitudes in a right triangle. When an altitude is drawn from the right angle vertex, it divides the hypotenuse into two segments. The lengths of these segments can be used to find the length of the hypotenuse.

Using the given information, we can see that FH is one of the segments of the hypotenuse EG. We are given FH = 9. To find the length of the other segment HG, we can use the property of similar triangles.

Triangle EFG and triangle EHF are similar by the AA (angle-angle) similarity criterion since they share angle E and angle F. Therefore, we can set up the following proportion:

EF/FH = EG/HG

Substituting the given values:

15/9 = EG/HG

Cross-multiplying

15 * HG = 9 * EG

Dividing both sides by 15:

HG = (9 * EG) / 15

Simplifying:

HG = 3EG/5

Now, the hypotenuse EG can be expressed as the sum of the two segments, EG = FH + HG:

EG = 9 + 3EG/5

To solve for EG, we can multiply both sides by 5 to eliminate the fraction:

5EG = 45 + 3EG

Rearanging the equation:

5EG - 3EG = 45

2EG = 45

Dividing both sides by 2:

EG = 45/2

Therefore, the length of EG is 22.5 units.

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