Please urgent need the work and answer
X=3.2
Y=6.1
Z=0.2

XZ +Y2

Cracking the code: 8 2One number is correct and well placed One number is correct but in the wrong placeTwo numbers are correct but in the wrong place38Nothing is correctCODE8One number is correct but in the wrong placeCracking the code of this sequence of numbers can be a bit tricky, but let's do it step by step. We are given the following clues about the sequence of numbers:

One number is correct and well placed: Since the sequence of numbers is 8 2, we know that the number 8 is in the first position. So the code is either 8 _ _ _ or _ _ _ 8.One number is correct but in the wrong place: This clue tells us that the number 2 is not in the second position of the code, but it is somewhere else.

Therefore, we know that the code is not 8 2 _ _ or _ _ 2 8.Two numbers are correct but in the wrong places: This clue tells us that the code contains the numbers 3 and 8, but they are in the wrong position. Since the code cannot be 8 2 _ _ or _ _ 2 8, we know that the two correct numbers are not in the last two positions. Therefore, the code must be _ 3 8 _ or _ 8 3 _.Nothing is correct: This clue tells us that the code cannot be 3 8 _, 8 3 _, or _ 3 8 because they all contain at least one correct number. Therefore, the code must be _ _ 3 8 or 3 8 _ _.One number is correct but in the wrong place: This clue tells us that the code cannot be 3 8 _, so it must be 8 3 _. Therefore, the code is 8 3 _ _.I hope this helps you crack the code!

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An expression which can be used to find the surface area of the triangular prism include the following: C. 2(1/2 · 3 · 4) + 4 · 2 + 3 · 2 + 5 · 2.

In Mathematics, the surface area of a triangular prism can be calculated by using this mathematical expression:

Total surface area of triangular prism = (Perimeter of the base × Length of the prism) + (2 × Base area)

Total surface area of triangular prism = (S₁ + S₂ + S₃)L + bh

where:

By substituting the given parameters into the surface area of triangular prism formula, we have:

Surface area of triangular prism = Area (GFEH + BCEF + BIJC + ABF + ECD)      

Surface area of triangular prism = 4 · 2 + 3 · 2 + 5 · 2 + (¹/₂ · 3 · 4) + (¹/₂ · 3 · 4)  

Surface area of triangular prism = 2(1/2 · 3 · 4) + 4 · 2 + 3 · 2 + 5 · 2.

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tan nx + tanx1 - tan nxtanx =tan(n+1)x identity holds true in two cases.

To prove the identity:

tan(nx) + tan(x1) - tan(nx)tan(x) = tan((n+1)x)

We'll start with the left-hand side:

tan(nx) + tan(x1) - tan(nx)tan(x)

We can use the identity for the sum of tangents:

tan(A + B) = (tan A + tan B) / (1 - tan A tan B)

If we let A = nx and B = x1, then we can write:

tan(nx + x1) = (tan(nx) + tan(x1)) / (1 - tan(nx)tan(x1))

Simplifying the denominator:

tan(nx + x1) = (tan(nx) + tan(x1)) / (tan(nx + x1) - tan(nx)x1)

Multiplying both sides by (tan(nx + x1) - tan(nx)x1):

tan(nx + x1)(tan(nx + x1) - tan(nx)x1) = tan(nx) + tan(x1)

Expanding the left-hand side:

tan²(nx + x1) - tan(nx)x1 tan(nx + x1) = tan(nx) + tan(x1)

Moving all terms to one side:

tan²(nx + x1) - tan(nx + x1)tan(nx)x1 - tan(nx) - tan(x1) = 0

Factoring the quadratic:

(tan(nx + x1) - tan(nx)x1) (tan(nx + x1) - tan(x1)) = 0

So either:

tan(nx + x1) = tan(nx)x1

Or:

tan(nx + x1) = tan(x1)

If we consider the case where tan(nx + x1) = tan(nx)x1, then we can substitute this expression into the left-hand side of the original identity:

tan(nx) + tan(x1) - tan(nx)tan(x)

= tan(nx) + tan(x1) - (tan(nx + x1) / x1)

= tan(nx) + tan(x1) - (tan(nx)x1 / x1)

= tan(nx) + tan(x1) - tan(nx)

= tan(x1)

And this is equal to the right-hand side of the original identity, which is:

tan((n+1)x)

So the identity holds.

If we consider the case where tan(nx + x1) = tan(x1), then we can similarly substitute this expression into the left-hand side of the original identity:

tan(nx) + tan(x1) - tan(nx)tan(x)

= tan(nx) + tan(x1) - (tan(nx + x1) / x1)

= tan(nx) + tan(x1) - (tan(x1) / x1)

= (tan(nx) x1 + tan(x1) - tan(nx)tan(x)) / x1

= tan((n+1)x)

And this is equal to the right-hand side of the original identity, which is:

tan((n+1)x)

So the identity holds in this case as well.

Therefore, we have shown that the identity holds in both cases, and hence it holds in general.

What is Trigonometric identities?

Trigonometric Identities are the equalities that involve trigonometry functions and holds true for all the values of variables given in the equation.

There are various distinct trigonometric identities involving the side length as well as the angle of a triangle. The trigonometric identities hold true only for the right-angle triangle.

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Step-by-step explanation:volume = 0.5 * b * h * length , where b is the length of the base of the triangle, h is the height of the triangle, and length is prism length

The 12 months of age) as percentiles of the CDC growth chart reference population.

The most likely description of Sarah's weights (at 3, 6, 9, and 12 months of age) as percentiles of the CDC growth chart reference population is: 85th percentile at 3 months; 85th percentile at 6 months; 90th percentile at 9 months; 95th percentile at 12 months.What is percentile in statistics?In statistics, a percentile is a value below which a specific percentage of observations in a group falls. It is used to split up data into segments that represent an equal proportion of the entire group, resulting in a data set split into 100 equal portions, with each portion representing one percentage point. Sarah's weight is in the 85th percentile at 3 months, 85th percentile at 6 months, 90th percentile at 9 months, and 95th percentile at 12 months is a most likely description of her weights (at 3, 6, 9, and 12 months of age) as percentiles of the CDC growth chart reference population.

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The distance of the line is √17 and the midpoint of the line is ( 5/2 , 2).

Why do you use the word distance?

Distance is the total movement of an object without taking direction into account. Distance can be described as the amount of ground that an object has covered, regardless of its beginning or ending points.

points A (3,-1) B (2,5)

D = √(x₂ - x₁)² + (y₂ - y₁ )²

    = √(2 - 3)² + ( 5- ( -1))²

     = √(-1)² + (4)²

      = √1 + 16

        = √17

  midpoint =   x = 2 + 3/2

                          = 5/2

                   y = 5 - 1/2

                   y = 2

  (x,y) = ( 5/2 , 2)

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When a 666-sided fair die is rolled, then the probability of rolling greater than 4 is  0.9940 or 99.40%.

Given that the die is fair and has 666 sides. So, each face of the die will have a probability of 1/666, i.e.,

p(1) = p(2) = ... = p(666) = 1/666.

The probability of rolling greater than 4 is P(roll greater than 4), which is the sum of the probabilities of rolling a 5, 6, 7, 8, 9, ..., 666. So,

P(roll greater than 4) = p(5) + p(6) + p(7) + ... + p(666)

P(roll greater than 4) = (1/666) + (1/666) + (1/666) + ... + (1/666)

(There are 661 terms)P(roll greater than 4) = 661(1/666)

P(roll greater than 4) = 0.9940 (rounded to four decimal places)

Hence, the probability of rolling greater than 4 is 0.9940 or 99.40%.

Alternatively, the probability of rolling greater than 4 is

   1 - P(roll less than or equal to 4)P(roll greater than 4)

= 1 - P(roll less than or equal to 4)P(roll greater than 4)

= 1 - (p(1) + p(2) + p(3) + p(4))P(roll greater than 4)

= 1 - (4/666)P(roll greater than 4)

= 1 - 0.0060P(roll greater than 4)

 = 0.9940 (rounded to four decimal places)

Hence, the probability of rolling greater than 4 is 0.9940 or 99.40%.

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Existence and Uniqueness Theorem the existence and uniqueness theorem is the most critical theorem in differential calculus. The theorem addresses how the existence and uniqueness of a solution to a first-order differential equation are affected by conditions such as continuity or Lipschitz continuity.

Determine if the existence and uniqueness theorem does or does not guarantee the existence and uniqueness of a solution to each of the following initial value problems.

1. The differential equation is

                     [tex]\frac{dy}{dx}=\sqrt{x-y}[/tex]

       The condition of the theorem is fulfilled: The differential equation is continuous and the partial derivative   [tex]\frac{\partial f}{\partial y}=\frac{-1}{2\sqrt{x-y}}[/tex]  is continuous.

            Therefore, the theorem guarantees the existence and uniqueness of the solution to the initial value problem.

2. The differential equation is

              [tex]\frac{dy}{dx}=\sqrt{x-y}[/tex]

         The condition of the theorem is not fulfilled.

            [tex]\frac{\partial f}{\partial y}=\frac{-1}{2\sqrt{x-y}}[/tex] is not defined at [tex]x=y .[/tex]

            Therefore, the theorem does not guarantee the existence and uniqueness of the solution to the initial value problem.

3. The differential equation is  [tex]y\frac{dy}{dx}=x-1[/tex] The condition of the theorem is fulfilled: The differential equation is continuous and the partial derivative [tex]\frac{\partial f}{\partial y}=y[/tex] is continuous.

     Therefore, the theorem guarantees the existence and uniqueness of the solution to the initial value problem.

4. The differential equation is

              [tex]y\frac{dy}{dx}=x-1[/tex]

       The condition of the theorem is not fulfilled   [tex]\frac{\partial f}{\partial y}=y[/tex]  and is not defined at  y=0

    Therefore, the theorem does not guarantee the existence and uniqueness of the solution to the initial value problem.

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The reason why the terms a and m have to be relatively prime integers is that it is the only way to make sure that ax≡1 (mod m) is solvable for x within the integers modulo m.

Theorem:"If a and m are relatively prime integers and m > 1, then an inverse of a modulo m exists. Furthermore, this inverse is unique modulo m. (That is, there is a unique positive integer a less than m that is an inverse of a modulo m and every other inverse of a modulo m is congruent to a modulo m.)"If a and m are relatively prime integers and m > 1, then an inverse of a modulo m exists. Furthermore, this inverse is unique modulo m. (That is, there is a unique positive integer a less than m that is an inverse of a modulo m and every other inverse of a modulo m is congruent to a modulo m.)The inverse of a modulo m is another integer, x, such that ax≡1 (mod m).

This theorem has an interesting explanation: if a and m are not co-prime, then there is no guarantee that ax≡1 (mod m) has a solution in Zm. The reason for this is that if a and m have a common factor, then m “absorbs” some of the factors of a. When this happens, we lose information about the congruence class of a, and so it becomes harder (if not impossible) to undo the multiplication by .This is the reason why the terms a and m have to be relatively prime integers.

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The  value of |sin x - x| ≤ 0.5*10^-1 and the value of |sin x - x| ≤ (0.1)^2/2! = 0.005 and value of x for which these approximations hold is |x| < 0.1.

(a) Using the alternating series error bound, we can bound the error of the approximation sin x = x when |x| < 0.1 as follows:

|sin x - x| ≤ |Rn| ≤ a[n+1], where a = 1 and n = 1 since we only need to use the first term of the alternating series expansion of sin x.

Therefore, |sin x - x| ≤ 0.5*10^-1.

(b) Using the Lagrange error formula, we can bound the error of the approximation sin x = x when |x| < 0.1 as follows:

|sin x - x| ≤ |Rn| ≤ M*(x^(n+1))/(n+1)!, where M is the maximum value of the (n+1)th derivative of sin x on the interval [0, x].

In this case, we can take n = 1, and since the second derivative of sin x is bounded by 1, we have M = 1.

Therefore, |sin x - x| ≤ (0.1)^2/2! = 0.005.

(c) The value of x for which these approximations hold is |x| < 0.1.

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The monthly payment on a 6-year loan of $15,250 at 3.5% compounded monthly is (b)$235.13 (rounded to the nearest cent).

To find the monthly payment on a loan, we can use the formula:

PMT = (P × r) / [1 - (1 + r) ^ -n]

Where: P = principal amount (in this case, $15,250)

r = interest rate per period (monthly rate = 3.5% / 12 ⇒ 0.002917)

n = the total number of periods (6 years × 12 months/year ⇒ 72 months)

Now we can substitute the values:

PMT = ($15,250 × 0.002917) / [1 - (1 + 0.002917) ^ -72]

After solving we get:

PMT ≈ $235.125 → rounded to the nearest cent,

The compound monthly payment is $235.13.Therefore, option (b) is correct.

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1. The retail prices are: $44.36, $34.10 and $67.57

2. The sales prices are: $263.20 and $65.59

Retail price refers to the price at which a product or service is sold to the final consumer by a retailer. This price includes the cost of production, transportation, marketing, and other related expenses, as well as a markup to generate profit for the retailer.

1. New Items - Calculate Retail Prices

  Item                    Wholesale        Mark Up       Calculation              Retail

                              Cost ($)            Percent%                                      Price ($)

a. Louisville             $22.75             95%          22.75+(95%×22.75)  =$44.36

Slugger bat and

batting glove set

b. Wilson                 $11.00                210%         11+(210%×11)              =$34.10

Basketball

c. Element               $26.50              155%      26.50+(155%×26.50) =$67.57

Skateboard

2. Items on sale - Calculate Sale Prices

    Item                 Retail             Discount           Calculation            Sales

                           price ($)          Percent %                                       Price ($)

a. Head              $329.00              20%          329-(20%×329)         $263.20

Snowboard

b. Kelly                $79.99                18%           79.99-(18%×79.99)     $65.59

Ski poles

All data is filled in below table.

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It is true that Jayden's solution is incorrect. It is false that Jayden added inside the parentheses before dividing.

It is false that Jayden substituted the wrong value for a. It is true that Jayden divided 14 by 2 and then added 1. 5. Jayden added inside the parentheses before multiplying. ​

1) The correct solution is

Given,

a ÷ (2 + 1. 5)

Substituting the value of a which is 14

= 14 ÷ (2 + 1. 5)

= 14 ÷ 3.5

= 4

2) As there is no term which needs to be divided so, the second statement is false.

3) Jayden didn't substitute the wrong value of a he just solved the given expression without considering the bracket and divided the 14 which is the value of a by 2.

4) Jyaden divided 14 by 2 and then added 1. 5. Jayden added inside the parentheses before multiplying. ​

i.e. a ÷ (2 + 1. 5)

14 ÷ 2 + 1. 5

7+1.5

8.5

This is the way Jayden solved the equation due to which he arrived at the wrong solution.

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The Correct question is as below

Jayden evaluated the expression a ÷ (2 + 1.5) for a = 14. He said that the answer was 8.5. Choose True or False for each statement.

1. Jayden's solution is incorrect.

2. Jayden added in the parentheses before dividing.

3. Jayden substituted the wrong value for a.

4. Jayden divided 14 by 2 and added 1.5

The expression for the number of non-adult sizes is s - 19.

A value or amount is represented by an expression, which is a collection of numbers, variables, and mathematical operations like addition, subtraction, multiplication, and division. Calculations, complicated mathematical equations, and issues in a variety of disciplines, including science, engineering, economics, and statistics, may all be solved using expressions. Functions that depict a connection between variables, such as sin(x) and log(x), can also be included in expressions. Expressions are frequently employed to simulate real-world circumstances and provide predictions based on mathematical analysis.

Given that the total number od sweatshirts = s.

The number of non-adult sweatshirts can be calculated by:

Number of non-adult sizes = Total number of sweatshirts sold - Number of adult sizes

= s - 19

Hence, the expression for the number of non-adult sizes is s - 19.

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Answer:

Let's call the first number x and the second number y.

From the problem, we know that:

To solve for x and y, we can start by expressing one variable in terms of the other, using one of the equations.

Rearranging the first equation to solve for x, we get:

x = 425 - y

Now we can substitute this expression for x into the second equation, and solve for y:

0.2x = 0.3y (substituting x = 425 - y)

0.2(425 - y) = 0.3y (distributing the 0.2)

85 - 0.2y = 0.3y (combining like terms)

85 = 0.5y (adding 0.2y to both sides)

y = 170 (dividing both sides by 0.5)

So the second number is 170. To find the first number, we can substitute this value back into the first equation:

x + y = 425 (substituting y = 170)

x + 170 = 425

x = 255

Therefore, the two numbers are 255 and 170.

Given:

81x = 243x

= 243 / 81x

= 3

x = 3

Answer:

$735.264

Step-by-step explanation:

First, we need to find 8% of the total payment of the TV:

8% of $799.20

[tex]\frac{8}{100}[/tex] x $799.20

= $63.936

Finally, subtract $63.936 from $799.20:

= $735.264.

Therefore, if I bought a TV and the tax rate is 8% and the total payment of the TV is $799.20, the before tax of the TV is $735.264.

The measure of angle G is 34° because the sum of the measures of the angles GFE and GF is 180° - 28° = 152° and the measure of angle GFE is 28°, so the measure of angle GF is 152° - 28° = 34°.

An angle is a shape formed when two lines or rays intersect. It is measured in degrees and is used in mathematics and geometry to describe the size and direction of a corner or turn. Angles measure the amount of turn between two lines, and can be described as either acute, obtuse, right, or reflex. Angles are also used to describe the orientation of objects in space, such as the position of the sun or the direction of a car relative to its surroundings.

The measure of angle GFE is 180° minus angle FEG, which is 180° - 28° = 152°. Since the sum of the measures of the angles of a triangle must equal 180°, the measure of angle GF is 180° - 152° = 28°. Therefore, the measure of angle G is 34° because the sum of the measures of the angles GFE and GF is 180° - 28° = 152° and the measure of angle GFE is 28°, so the measure of angle GF is 152° - 28° = 34°.

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The ∠E is 28°. Then what is the angle that is on the opposite side of ∠E It is ∠G.∠G would be 28°.

An angle is a shape formed when two lines or rays intersect. It is measured in degrees and is used in mathematics and geometry to describe the size and direction of a corner or turn. Angles measure the amount of turn between two lines, and can be described as either acute, obtuse, right, or reflex. Angles are also used to describe the orientation of objects in space, such as the position of the sun or the direction of a car relative to its surroundings.

198: line EF and line FG have same length of 6.

A triangle that has to be two sides of the equal length is the  called isosceles triangle.

So your triangle is an isosceles triangle!

An isosceles with the  triangle has two angles on facing each other are the same.

For example, the ∠E is 28°. Then what is the angle that is on the opposite to side of ∠E? It is ∠G.

∠G would be 28°.

So your answer is C. 28°.

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Answer: calculate the amount of his refund.

Step-by-step explanation:

We cannot construct an interval using the normal approximation of survival rate between control and treatment groups because the samples must be random, independent, and their sample sizes must be sufficiently large.

The normal approximation is valid when the sample sizes are large enough to ensure that the sampling distribution of the mean of the variable is approximately normal.

The central limit theorem applies to the distribution of the sample mean when the sample size is large enough, according to the normal approximation.

As a result, the mean difference between the two groups must have a normal distribution. The normal distribution may not be an accurate representation of the underlying distribution of the difference between the two population means in the absence of this requirement, causing the confidence interval to be inaccurate. It will lead to incorrect inferences about the difference in the survival rates of the two groups.

The confidence interval constructed despite this problem will lead to incorrect inferences about the difference in the survival rates of the two groups. This would make it difficult to draw any conclusions based on the findings of this experiment.

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The system of inequalities to represent the constraints of the situation are x ≤ 260, y ≤ 320, and x + y ≤ 360.

A group of two or more linear inequalities are grouped together and graphed on a coordinate plane to discover the solution that concurrently solves all of the inequalities. Each inequality forms a half-plane on the coordinate plane, and the location where all the half-planes overlap is where the system is solved. Each point inside the feasible area meets all of the system's inequalities. This region is known as the feasible region. To identify the optimum solution given a set of constraints, systems of linear inequalities are frequently utilised in optimization issues.

Let us suppose the number of boards of Mahagony sold = x.

Let us suppose the number of black walnut boards sold = y.

According to the given problem the equation can be set as follows:

x ≤ 260 (the company has 260 boards of mahogany available)

y ≤ 320 (the company has 320 boards of black walnut available)

x + y ≤ 360 (the company expects to sell at most 360 boards of wood)

Hence, the system of inequalities to represent the constraints of the situation are x ≤ 260, y ≤ 320, and x + y ≤ 360.

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The solution for X in equation 30=5(X+5)X is X= 1.

To solve the equation, we can start by distributing the 5 on the right-hand side of the equation, which gives us:

30 = 5X + 25X

Combining like terms, we get:

30 = 30X

Dividing both sides by 30, we get:

X = 1

However, we need to check whether this value satisfies the original equation. Plugging X=1 into the equation gives us:

30 = 5(1+5)(1)

30 = 5(6)

30 = 30

Therefore, the only valid solution is X=1.

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The value of m that makes u and v parallel vectors is 5.

if u and v are parallel, we need to find a scalar k such that:

u = kv

k(3i) = I (the i-component of u is equal to k times the i-component of v)

k(-6j) = -aj (the j-component of u is equal to k times the j-component of v, but with a negative sign since the j-component of u is negative)

k(mk) = 5k (the k-component of u is equal to k times the k-component of v)

Simplifying each equation, we get:

[tex]3k = 1\\-6k = -a\\m*k = 5k[/tex]

From the first equation, we get k = [tex]\frac{1}{3}[/tex]. Substituting this value into the second equation, we get a = 2. Finally, substituting k = [tex]\frac{1}{3}[/tex] into the third equation, we get:

m*([tex]\frac{1}{3}[/tex]) = 5*[tex]\frac{1}{3}[/tex])

Simplifying, we get:

m = 5

Parallel vectors are two or more vectors that have the same or opposite direction, regardless of their magnitudes. In other words, parallel vectors are vectors that are either collinear or antiparallel. To determine if two vectors are parallel, one can check if the cross product of the vectors is zero. If the cross product is zero, then the vectors are parallel. If the cross product is nonzero, then the vectors are not parallel.

Parallel vectors are commonly used in various fields such as physics, engineering, and computer science. For example, in physics, parallel vectors are used to describe the motion of objects along a straight line, while in computer graphics, they are used to represent the direction of light and the orientation of objects in a scene.

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For every consecutive solid that is dilated by k, the volume is multiplied by k³ thus, Elena's reasons can be used to argue the reasoning.

A dilatation is a transformation that alters the size but not the shape of an item. Every point on an item moves away from or towards a fixed position known as the centre of dilatation when the object is dilated. The scale factor is multiplied by the distance between each location and the centre of dilatation.

Thinking about a cube with s sides. We are aware that this cube's volume is s³. This cube will have a new side length of ks and a new volume of (ks)³ = k³s³ if we dilate it by a factor of k. Hence, as Clare said, the volume has been doubled by k³.

Fo any other solid right now. Similar to how a 2D form may be thought of as being composed of several little rectangles, we can conceive of this solid as being composed of many small cubes. Each of these little cubes will be dilated by a factor of k if we dilate the solid by a factor of k.

Hence, for any solid, if it's dilated by a factor of k, the volume is multiplied by k³.

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The length of the third side of the actual patio is 15.75 feet.

In order to solve issues requiring proportional connections between the sides of two triangles, it is crucial to understand the idea of triangle similarity. If the matching sides and angles of two triangles are identical, then two triangles are said to be similar. When referring to similarities, the symbol is used.

Let us suppose the length of third side = x.

Given that, blueprint of a triangular patio has side lengths 3.5 in., 3.5 in., and 5.25 in.

Thus, the blueprint and the actual patio form two similar triangles.

The sides of the similar triangles are equal in ratio thus,

3.5/5.25 = 10.5/x

3.5x = 5.25 * 10.5

x = (5.25 * 10.5) / 3.5

x = 15.75

Hence, the length of the third side of the actual patio is 15.75 feet.

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A prism with a rectangular base is a figure that has two parallel and congruent rectangular bases connected by rectangular or parallelogram-shaped lateral faces.

Therefore, the figure that is a prism is "a prism with a rectangular base."

A prism with a rectangular base is a three-dimensional solid figure that has two parallel and congruent rectangular bases connected by rectangular or parallelogram-shaped lateral faces. It is a type of prism, which is a geometric figure that has identical ends and flat sides that connect them.

A pyramid with a rectangular base has a rectangular base and triangular faces that meet at a single vertex. A cylinder has two congruent circular bases and a curved lateral surface connecting them. A pyramid has a polygonal base and triangular faces that meet at a single vertex.

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After all the linking that will happen, there will be only one train left, moving at the speed of the slowest initial train.

If the three equally spaced trains had started in a different order, the final configuration would still be the same - one train moving at the speed of the slowest initial train.

On average, there will always be only one train left, regardless of the initial ordering of the trains. This is because after all the linking, the train with the slowest speed will always be at the front of the train and no other train can pass it.

If there are four equally spaced trains initially, after all the linking, there will be one train left moving at the speed of the slowest initial train. This is because any two faster trains that link up will then be slower than the train behind them, so the only train left will be the slowest one.

Similarly, if there are five or more equally spaced trains initially, after all the linking, there will be only one train left moving at the speed of the slowest initial train.

Therefore, regardless of the number of equally spaced trains initially, there will always be only one train left after all the linking.

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An algebraic proof of the triangle inequality is ||u + v|| ≤ ||u|| + ||v||.

Let u and v be vectors in a vector space.

Using the properties of the inner product,

we have[tex],|u + v|² = (u + v) · (u + v)= u · u + u · v + v · u + v · v= |u|² + 2u · v + |v|²[/tex]

Now, take the square root of both sides of the above equation to get

|u + v| = sqrt(|u|² + 2u · v + |v|²) ≤ sqrt(|u|² + 2|u||v| + |v|²)= sqrt(|u|²) + sqrt(2|u||v|) + sqrt(|v|²) = |u| + |v|

Therefore, ||u + v|| ≤ ||u|| + ||v||. The equality holds if and only if u and v are linearly dependent.

Hence, the inequality is sometimes called the strict triangle inequality.

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The distribution is skewed to the right.

If the median is to the left of the center of the box and the right whisker is substantially longer than the left whisker in a box plot, then the distribution is skewed to the right.

This means that the majority of the data is clustered on the left side of the box plot and there are some extreme values on the right side that are causing the right whisker to be longer.

The median being to the left of the center of the box indicates that the data is not symmetric and is pulled to the left by the majority of the values.

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Answer:

a = -9

Step-by-step explanation:

2(a+3) = -12

2a + 6 = -12

2a = -18

a = -9

Let's Check

2(-9 + 3) = -12

2(-6) = -12

-12 = -12

So, a = -9 is the correct answer.