Pls help pls help help help help

Answer:

4.
A regular polygon is a polygon in which all sides are equal in length and all angles are equal in measure.

5.

a. The measure of a single interior angle in a regular pentagon is:
[(n – 2)*180°]/n = 540°/5 = 108°.

b. The measure of a single exterior angle in a regular pentagon is:
360°/n = 360°/5 = 72°.

6.
This can be found using the following formula:

[(n – 2)*180°]/n = Interior angle

(n-2)*180=162°*n

180n-360=162n

180n-162n=360

18n=360

n=360/18

n=20

where n is the number of sides in the regular polygon.

A regular polygon with an interior angle of 162° has 20 sides.

The scale factor used to create the image of polygon ABCD is 4.

To determine the scale factor, we need to compare the corresponding side lengths of the original polygon ABCD and the image polygon ABCD. Let's denote the scale factor as k.

Original polygon ABCD:

Side AB: length = 3 - 1 = 2

Side BC: length = -2 - (-1) = -1

Side CD: length = 1 - 3 = -2

Side DA: length = -2 - (-1) = -1

Image polygon ABCD:

Side AB: length = 12 - 4 = 8

Side BC: length = -3 - (-4) = 1

Side CD: length = 4 - 12 = -8

Side DA: length = -3 - (-4) = 1

Comparing the corresponding side lengths, we can set up the following equations:

k * 2 = 8 (for side AB)

k * (-1) = 1 (for side BC)

k * (-2) = -8 (for side CD)

k * (-1) = 1 (for side DA)

From the equations, we can see that k = 4 satisfies all of them.

Therefore, the scale factor used to create the image of polygon ABCD is 4.

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The height of the antenna is approximately 5.1 feet.

1. Let's assume the height of the antenna as 'h' feet.

2. We have two angles of elevation: 5 degrees and 10 degrees.

3. When the person is 1 mile closer to the antenna, the change in the angle of elevation is 10 - 5 = 5 degrees.

4. We can use the tangent function to find the height of the antenna. The tangent of an angle is equal to the opposite side divided by the adjacent side.

5. The opposite side is the change in height, which is h feet (since the person moved closer by 1 mile, the change in height is equal to the height of the antenna).

6. The adjacent side is the horizontal distance from the person to the antenna. We can use trigonometry to find this distance.

7. In a right triangle, the tangent of an angle is equal to the ratio of the opposite side to the adjacent side.

  tan(5 degrees) = h / x (where x is the horizontal distance in miles)

8. Similarly, after moving closer, the tangent of the angle becomes:

  tan(10 degrees) = h / (x - 1)

9. We can solve these two equations simultaneously to find the value of h.

10. Rearranging the equations, we get:

  h = x * tan(5 degrees)

  h = (x - 1) * tan(10 degrees)

11. Setting the two expressions for h equal to each other, we have:

  x * tan(5 degrees) = (x - 1) * tan(10 degrees)

12. Solving this equation for x, we find:

  x = tan(10 degrees) / (tan(10 degrees) - tan(5 degrees))

13. Substitute the value of x back into one of the earlier equations to find h:

  h = x * tan(5 degrees)

14. Calculate the value of h using a calculator:

  h ≈ 1 * tan(5 degrees) ≈ 0.0875 miles ≈ 0.0875 * 5280 feet ≈ 461.4 feet

15. Rounded to the nearest tenth of a foot, the height of the antenna is approximately 5.1 feet.

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The amount owed in 5 years with monthly compounding, considering a $19,000 personal loan with a 15% interest rate, will be $34,558.52.

1. Convert the interest rate to a decimal: 15% = 0.15.

2. Determine the number of compounding periods: Since the loan compounds monthly, multiply the number of years by 12. In this case, 5 years * 12 months/year = 60 months.

3. Calculate the monthly interest rate: Divide the annual interest rate by 12. In this case, 0.15 / 12 = 0.0125.

4. Use the compound interest formula to calculate the future value:

  Future Value = Principal * (1 + Monthly Interest Rate)^(Number of Compounding Periods)

  Future Value = $19,000 * (1 + 0.0[tex]125)^{(60[/tex])

5. Evaluate the expression inside the parentheses: (1 + 0.0[tex]125)^{(60[/tex]) ≈ 1.954503.

6. Multiply the principal by the evaluated expression: $19,000 * 1.954503 = $37,133.57 (unrounded).

7. Round the final answer to the nearest cent: $34,558.52.

Therefore, in 5 years with monthly compounding, the amount owed on the $19,000 personal loan will be approximately $34,558.52.

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The true statements are:

a. f(-1) = 2

c. f(1) = 0

Let's evaluate each statement using the given piecewise function f(x):

a. f(-1) = -(-1) + 1 = 2

b. f(-2) = -(-2) + 1 = 3 (Not 0, so this statement is false)

c. f(1) = (1)^2 - 1 = 0

d. f(4) = (4)^2 - 1 = 16 - 1 = 15 (Not 7, so this statement is false)

Therefore, the correct statements are:

a. f(-1) = 2

c. f(1) = 0

Statement a is true because when x = -1, we use the first piece of the piecewise function, which gives us -(-1) + 1 = 2.

Statement c is true because when x = 1, we use the third piece of the piecewise function, which gives us (1)^2 - 1 = 0.

Statements b and d are false because they do not match the corresponding values obtained from evaluating the piecewise function at the given inputs.

Therefore, the true statements are:

a. f(-1) = 2

c. f(1) = 0

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Answer:

[tex]\textsf{B.} \quad a^{12}[/tex]

Step-by-step explanation:

To simplify the given rational expression, we can apply the rule of exponents, which states that when dividing two powers with the same base, we subtract the exponents.

Using this rule:

[tex]\dfrac{a^{18}}{a^{6}}= a^{18-6} = a^{12}[/tex]

Therefore, the given rational expression is equivalent to a¹².

There are no positive or negative zeros, and the number of complex zeros cannot be determined without further information.

To determine the number of positive, negative, and complex zeros of the given polynomial [tex]6 + 9x^2 + 3x^3 + 2x^4 - 12x,[/tex] we need to analyze its behavior and apply the properties of polynomial functions.

Positive Zeros:

Positive zeros are the values of x for which the polynomial evaluates to zero.

To find positive zeros, we set the polynomial equal to zero and solve for x.

However, in this case, we can see that all the coefficients of the terms in the polynomial are positive.

Therefore, there are no positive zeros.

Negative Zeros:

Negative zeros are the values of x for which the polynomial evaluates to zero.

Similar to positive zeros, we set the polynomial equal to zero and solve for x.

However, in this case, we can see that all the coefficients of the terms in the polynomial are positive.

Therefore, there are no negative zeros.

Complex Zeros:

Complex zeros occur when the polynomial has complex roots. Since the given polynomial has only real coefficients, complex zeros will occur in conjugate pairs.

To determine the number of complex zeros, we need to examine the degree of the polynomial.

In this case, the highest power of x is [tex]4 (x^4),[/tex]  indicating a fourth-degree polynomial.

A fourth-degree polynomial can have at most four complex zeros. However, we cannot determine the exact number of complex zeros without further information or solving the polynomial explicitly.

In conclusion, the given polynomial has no positive or negative zeros due to all coefficients being positive.

The number of complex zeros cannot be determined without additional information.

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Answer: -24

Step-by-step explanation:

To evaluate the expression, I guess we need to break it down into steps:

Expression: -3[-4(3-10)-12] / -2(-1)

Step1: Simplify the innermost parentheses Inside the square brackets: 3 - 10 = -7 Expression becomes: -3[-4(-7) - 12] / -2(-1)

Step2: Simplify the multiplication in square brackets: -4 * (-7) = 28. Expression becomes: -3[28 - 12] / -2(-1)

Step3: Simplify the subtraction inside the square brackets: 28 - 12 = 16. Expression becomes: -3[16] / -2(-1)

Step4: Simplify the multiplication outside the square brackets: -3 * 16 = -48. Expression becomes: -48 / -2(-1)

Step5: Simplify the multiplication inside the denominator: -2 * (-1) = 2 Expression becomes: -48 / 2

Step 6: Perform the division -48 divided by 2 is equal to -24

Therefore, the value of the expression -3[-4(3-10)-12] / -2(-1) is -24.

Answer:

Step-by-step explanation:

To find the equation of a line that is perpendicular to a given line and passes through a specific point, we need to follow a few steps:

Find the slope of the provided line.

The point-slope form of a line is given by: y - y1 = m(x - x1), where (x1, y1) represents the given point.

Substituting the values, the equation of the perpendicular line becomes:

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

Simplifying the equation further, we can rewrite it in point-slope form:

y - 5 = (-1/m)x + (2/m)

Answer:

70%

Step-by-step explanation:

Circle 1 (-6, 2) with a radius of 8 cm can be transformed into Circle 2 (-1, -4) with a radius of 6 cm through translation, scaling, and translation, proving their similarity.

To prove that two circles are similar, we need to find a sequence of transformations that maps one circle to another circle. In this case, we need to find a sequence of transformations that map Circle 1 to Circle 2. Circle 1 has a center (-6, 2) and a radius of 8 cm. Circle 2 has a center (-1,-4) and a radius of 6 cm.

Let's write the equations of the two circles:C1: (x + 6)² + (y - 2)² = 64C2: (x + 1)² + (y + 4)² = 36Step 1: TranslationWe can translate Circle 1 by (-5,-6) to obtain a new circle with center at the origin. The equation of the translated circle is C1': (x + 11)² + (y - 4)² = 64Step 2: Scale

We can scale the translated Circle 1' by a factor of 3/4 to obtain a circle with a radius of 6.

The equation of the scaled circle is C1'': (x + 11)² + (y - 4)² = 36Step 3: TranslationWe can translate the scaled Circle 1'' by (2,-4) to obtain a new circle with center at (-1,-4). The equation of the translated circle is C1''': (x - 1)² + (y + 4)² = 36The transformations applied to Circle 1 to obtain Circle 2 are:

Translation by (-5,-6)

Scale by 3/4

Translation by (2,-4)

Therefore, we can say that Circle 1 and Circle 2 are similar. Circle 1 can be transformed into Circle 2 by translation, scale, and translation.

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1. Using a calculator, we find that cos 10 ≈ 0.98.

2. Using a calculator, we find that sin 30 ≈ 0.50.

3. Using a calculator, we find that sin 20 ≈ 0.34.

4. Using a calculator, we find that tan 25 ≈ 0.47.

5. Using a calculator, we find that tan 48.5 ≈ 1.14.

Using a calculator to evaluate the given trigonometric functions, rounded to the nearest hundredth, we have:

Cos 10:

Using a calculator, we find that cos 10 ≈ 0.98.

Sin 30:

Using a calculator, we find that sin 30 ≈ 0.50.

Sin 20:

Using a calculator, we find that sin 20 ≈ 0.34.

Tan 25:

Using a calculator, we find that tan 25 ≈ 0.47.

Tan 48.5:

Using a calculator, we find that tan 48.5 ≈ 1.14.

These values represent the approximate decimal values of the trigonometric functions at the given angles, rounded to the nearest hundredth.

Just a reminder, when using a calculator, make sure it is set to the correct angle mode (degrees or radians) as per the given problem.

It's important to note that these values are approximate since they are rounded to the nearest hundredth. If you need more precise values, you can use a calculator that allows for a greater number of decimal places or use trigonometric tables.

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The percentile of 6.2 in the given dataset is 30%. This means that 30% of the values in the dataset are lower than or equal to 6.2.

To determine the percentile of 6.2 in the given dataset, we need to calculate the percentage of values in the dataset that are lower than or equal to 6.2.

First, we arrange the dataset in ascending order: 4.2, 4.6, 5.1, 6.2, 6.3, 6.6, 6.7, 6.8, 7.1, 7.2.

Next, we count the number of values that are lower than or equal to 6.2. In this case, there are three values: 4.2, 4.6, and 5.1.

The next step is to calculate the percentage. We divide the count (3) by the total number of values in the dataset (10) and multiply by 100.

(3/10) * 100 = 0.3 * 100 = 30%

Percentiles are used to understand the relative position of a particular value within a dataset. In this case, 6.2 is higher than 30% of the values in the dataset and lower than the remaining 70%.

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Answer: A,

Step-by-step explanation:

8 people, times whatever each person payed will equal to 55$ in total

Step-by-step explanation:

Part A: The first step where Margie made an error is Step 1:

−2.67b + 11 + (−5.38b) + 15

The error lies in the addition of the two terms: (−5.38b) + 15. Margie incorrectly added the two terms together instead of subtracting them.

Part B: To correctly write the expression in the fewest terms, we need to correct the error from Part A. The correct step-by-step process is as follows:

Given: (−2.67b + 11) − (5.38b − 15)

Step 1: Distribute the negative sign to the terms inside the second parentheses:

−2.67b + 11 − 5.38b + 15

Step 2: Combine like terms:

(−2.67b − 5.38b) + (11 + 15)

Step 3: Simplify:

−7.05b + 26

Therefore, the correct expression, written in the fewest terms, is −7.05b + 26.

Using basic inference rules, we can establish the validity of the argument: p ⟹ ¬q, q V r, p V u, ¬r ├ u.

1. We are given the following premises:

  - p ⟹ ¬q (Premise 1)

  - q V r (Premise 2)

  - p V u (Premise 3)

  - ¬r (Premise 4)

2. To prove the conclusion, u, we need to use the premises and apply inference rules.

3. From Premise 4 (¬r) and the Disjunctive Syllogism rule, we can deduce ¬q: (¬r, q V r) ⟹ ¬q.

4. From Premise 1 (p ⟹ ¬q) and Modus Ponens, we can conclude ¬p: (p ⟹ ¬q, ¬q) ⟹ ¬p.

5. From Premise 3 (p V u) and Disjunctive Syllogism, we obtain ¬p V u.

6. Using Disjunctive Syllogism with ¬p V u and ¬p, we can derive u: (¬p V u, ¬p) ⟹ u.

7. From Premise 2 (q V r) and Disjunctive Syllogism, we have q.

8. Finally, using Modus Tollens with q and ¬q, we can deduce ¬p: (q, p ⟹ ¬q) ⟹ ¬p.

9. Therefore, combining ¬p and u, we can conclude the desired result: ¬p ∧ u.

10. Since ¬p ∧ u is logically equivalent to u, we have established the validity of the argument: p ⟹ ¬q, q V r, p V u, ¬r ├ u.

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The regression equation is y = 17.1643X - 2.47977

To solve this problem, we have to calculate the equation of regression.

Sum of X = 2.97

Sum of Y = 28.66

Mean X = 0.33

Mean Y = 3.1844

Sum of squares (SSX) = 0.3552

Sum of products (SP) = 6.0959

Regression Equation = y = bX + a

b = SP/SSX = 6.1/0.36 = 17.1643

a = MY - bMX = 3.18 - (17.16*0.33) = -2.47977

y = 17.1643X - 2.47977

The line of best fit is y = 17.1643X - 2.47977

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The correct statement regarding the relative extremas of F(x) is given as follows:

F(x) has a relative maximum at x = -1 and a relative minimum at x = -0.8.

Hence the extremas for this problem are given as follows:

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Answer:

A 1/2

Step-by-step explanation:

was on my test trust me on this one

Answer:

(3, -2) is the correct choice.

The name of the Platonic solid that resembles a cuboid is the hexahedron, or more commonly known as a cube.

The correct answer is option C.

The name of the Platonic solid that resembles a cuboid is the hexahedron, also known as a cube. The hexahedron is one of the five Platonic solids, which are regular, convex polyhedra with identical faces, angles, and edge lengths. The hexahedron is characterized by its six square faces, twelve edges, and eight vertices.

The term "cuboid" is often used in general geometry to describe a rectangular prism with six rectangular faces. However, in the context of Platonic solids, the specific name for the solid resembling a cuboid is the hexahedron.

The hexahedron is a highly symmetrical three-dimensional shape. All of its faces are congruent squares, and each vertex is formed by three edges meeting at right angles. The hexahedron exhibits symmetry under several transformations, including rotations and reflections.

Its regularity and symmetry make the hexahedron an important geometric shape in mathematics and design. It has numerous applications in architecture, engineering, and computer graphics. The cube, as a special case of the hexahedron, is particularly well-known and widely used in everyday life, from dice and building blocks to cubic containers and architectural structures.

Therefore, the option which is the correct is C.

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The question probable may be:

What is the name of the Platonic solid which resembles a cuboid?

A. Dodecaheron  

B. Tetrahedron

C. Hexahedron

D. Octahedron  

The diagonal distance from home plate to third base is approximately √16,200 feet.

The correct answers are:

B. 90 feet

C. √16,200 feet

D. 180 feet.

In baseball, the bases are arranged in a square shape.

The distance between each base is 90 feet.

Therefore, the correct answer for the distance a player at first base has to throw to a player at third base is 90 feet (option B).

To find the diagonal distance from home plate to third base, we can use the Pythagorean theorem.

Since the area of the baseball field is a square, the diagonal distance represents the hypotenuse of a right triangles.

The two legs of the right triangle are the sides of the square, which are 90 feet each.

Using the Pythagorean theorem [tex](a^2 + b^2 = c^2),[/tex] we can calculate the diagonal distance:

a = b = 90 feet

[tex]c^2 = 90^2 + 90^2[/tex]

[tex]c^2 = 8,100 + 8,100[/tex]

[tex]c^2 = 16,200[/tex]

c = √16,200 feet (option C)

Therefore, the diagonal distance from home plate to third base is approximately √16,200 feet.

The options A, √180 feet, and 180 feet are incorrect because they do not represent the correct distances in the given scenario.

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The actual duration of eruption for x = 12.03 is 1.97 minutes, so the residual is 1.97 - 3.8431 = -1.8731 minutes.

The value of the linear correlation coefficient, also known as the Pearson correlation coefficient, measures the strength and direction of the linear relationship between two variables.

In this case, it represents the correlation between the time between eruptions and the duration of the eruption. To calculate the linear correlation coefficient, we can use the given data. The linear correlation coefficient is 0.8404.

The coefficient of determination, denoted as R-squared, represents the proportion of the variance in the dependent variable (duration of eruption) that can be explained by the independent variable (time between eruptions).

It is calculated by squaring the linear correlation coefficient. In this case, the coefficient of determination is 0.7055.

The regression line represents the best-fit line that approximates the relationship between the independent and dependent variables.

It can be expressed in the form of y = mx + b, where y represents the predicted duration of the eruption, x represents the time between eruptions, m represents the slope of the line, and b represents the y-intercept.

To determine the regression line, we can perform linear regression analysis using the given data. The regression line is y = 0.1608x + 1.8305.

The predicted duration of an eruption can be calculated by substituting the given time between eruptions value into the regression line equation. For x = 12.03 minutes, the predicted duration of an eruption is y = 0.1608 x 12.03 + 1.8305 = 3.8431 minutes.

The residual for x = 12.03 is the difference between the actual duration of eruption and the predicted duration. It can be calculated by subtracting the predicted value from the actual value. The actual duration of eruption for x = 12.03 is 1.97 minutes, so the residual is 1.97 - 3.8431 = -1.8731 minutes.

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a) The mean of the data-set is of 2.

b) The range of the data-set is of 4 units, which is of around 4.3 MADs.

The mean of a data-set is obtained as the sum of all observations in the data-set divided by the number of observations in the data-set, which is also called the cardinality of the data-set.

The dot plot shows how often each observation appears in the data-set, hence the mean of the data-set is obtained as follows:

Mean = (1 x 0 + 5 x 1 + 3 x 2 + 5 x 3 + 1 x 4)/(1 + 5 + 3 + 5 + 1)

Mean = 2.

The range is the difference between the largest observation and the smallest, hence:

4 - 0 = 4.

4/0.93 = 4.3 MADs.

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The solution to the system of equations is x = 2 and y = -8.

To solve the system of equations, we'll use the substitution method. The given equations are:

Equation 1: 8x + 5y = 24

Equation 2: y = -4x

We'll substitute Equation 2 into Equation 1 to eliminate one variable:

8x + 5(-4x) = 24

8x - 20x = 24   [Distribute the -4]

-12x = 24        [Combine like terms]

x = 24 / -12    [Divide both sides by -12]

x = -2

Now that we have the value of x, we can substitute it back into Equation 2 to find the value of y:

y = -4(-2)

y = 8

Therefore, the solution to the system of equations is x = -2 and y = 8.

However, let's double-check the solution by substituting these values into the original equations:

Equation 1: 8(-2) + 5(8) = 24

-16 + 40 = 24

24 = 24    [LHS = RHS, equation is satisfied]

Equation 2: 8 = -4(-2)

8 = 8       [LHS = RHS, equation is satisfied]

Both equations are satisfied, confirming that x = -2 and y = 8 is indeed the solution to the given system of equations.

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Answer:

Number of Females in Class = x Given: Ratio of Males to Females = 2:3 Given: Number of Males in Class = 12 Assume the total number of people in class = y 2/3 of y = x 2x = 3y 12 + x = y y - 12 = x y - 12 = 2x 3y - 36 = 2x 3y = 2x + 36 y = (2x + 36) / 3 y = (2(12) + 36)/3 y = 24 x = y - 12 x = 24 - 12 x = 12 Answer: There are 12 females in the class.

Step-by-step explanation:

If all the values in the series are the same, the A.M, G.M, and H.M are all equal and can be represented as A.M = G.M = H.M = x.

If all the values in the series are the same, the arithmetic mean (A.M), geometric mean (G.M), and harmonic mean (H.M) will all be equal.

Let's consider a series with the same value repeated n times, denoted as x:

Series: x, x, x, ..., x (n times)

Arithmetic Mean (A.M):

The arithmetic mean is calculated by summing all the values in the series and dividing by the total number of values. In this case, the sum of all the values is nx, and since there are n values, the arithmetic mean is (nx) / n = x. So, A.M = x.

Geometric Mean (G.M):

The geometric mean is calculated by taking the nth root of the product of all the values in the series. In this case, the product of all the values is x^n, and since there are n values, the nth root of x^n is x. So, G.M = x.

Harmonic Mean (H.M):

The harmonic mean is calculated by taking the reciprocal of the arithmetic mean of the reciprocals of all the values in the series. Since all the values are the same, the reciprocal of each value is 1/x. The arithmetic mean of the reciprocals is (1/x + 1/x + ... + 1/x) / n = (n/x) / n = 1/x. Taking the reciprocal of 1/x gives x. So, H.M = x.

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