what is the Area of the finished window

the probability that 7 to 9 women in the sample will hold the opinion is 0.1790

What is frequency distribution?

The gathered data is arranged in tables based on frequency distribution. The information could consist of test results, local weather information, volleyball match results, student grades, etc. Data must be presented meaningfully for understanding after data gathering. A frequency distribution graph is a different approach to displaying data that has been represented graphically.

a. To find the probability that at least 5 women in the sample will hold the opinion, we can use the complement rule and find the probability that less than 5 women will hold the opinion, and then subtract it from 1.

P(at least 5) = 1 - P(0) - P(1) - P(2) - P(3) - P(4)

where P(k) is the probability of k women holding the opinion in the sample.

Using the binomial probabilities table or technology, we can find:

P(at least 5) = 1 - P(0) - P(1) - P(2) - P(3) - P(4)

= 1 - 0.2037 - 0.3293 - 0.2836 - 0.1565 - 0.0626

= 0.9643

So the probability that at least 5 women in the sample will hold the opinion is 0.9643 (rounded to four decimal places).

b. To find the probability that 7 to 9 women in the sample will hold the opinion, we can use the binomial probabilities table or technology to find the individual probabilities of 7, 8, and 9 women holding the opinion, and then add them up.

P(7 to 9) = P(7) + P(8) + P(9)

Using the binomial probabilities table or technology, we can find:

P(7 to 9) = P(7) + P(8) + P(9)

= 0.1223 + 0.0440 + 0.0127

= 0.1790

So the probability that 7 to 9 women in the sample will hold the opinion is 0.1790.

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For a metal rod of length 31 cm is placed in a magnetic field of strength 2. 3 T, the induced emf, in volts, between the ends of the rod when the rod is not moving is equals to zero.

When a conducting rod is moving in magnetic field perpendicular to its velocity, electro motive force( EMF ) between the ends of the rod is generated due to the Lorentz force exerted on free charges of the rod. The value of [tex]EMF = BvLsin⁡θ[/tex], where B is magnetic field, L is the length of the rod, v is the rod speed, θ is the angle between the rod and velocity vector. We have a metal rod, with length of metal rod, L = 31 cm

The strength of magnetic field, B = 2.3 T, oriented perpendicular to the field, θ

= 90°

Now, the rod is not moving,so v = 0 m/s, then EMF = BvLsin⁡θ = 31× 2.3 × 0

=> EMF = 0 V.

So, The induced emf between the ends of the rod when the rod is not moving is zero.

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Complete question:

A metal rod of length 31 cm is placed in a magnetic field of strength 2. 3 t, oriented perpendicular to the field. Determine the induced emf, in volts, between the ends of the rod when the rod is not moving.

Answer:

54734431

Step-by-step explanation:

54734431

Answer:

9. Associative property

10. Distributive property

Name the property shown.

9. 2 x= x 2

td

11. 7(z+ y) = 7z+ 7y

10. 231= 23

12. a + (2b + 3c) = (a + 2b) + 3c

Answer:

Answer:

47 ÷ 3681 is approximately 0.0128

Answer:

The nswer is 0.0127682694919858

The name for the marked angle is given as follows:

B. <BAD.

To obtain the name of an angle in a triangle, we must first obtain the three vertices that compose the angle, which in this case are given as follows:

B, A and D.

Then we must add the < symbol, and consider that the middle vertex must be necessarily be at the middle of the notation, as follows:

<BAD.

Hence option B represents the correct option in the context of this problem.

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The equations which satisfy (6, -3) are: y = -5x + 27 and y = 2x - 15 (Option C and D)

To know which equation will result in (6, -3), we shall determine the value of y in each equation since we know that x = 6. Details below:

For A

y = -3x + 6

y = -3(6) + 6

y = -18 + 6

y = 12

For B

y = 2x - 9

y = 2(6) - 9

y = 12 - 9

y = 3

For C

y = -5x + 27

y = -5(6) + 27

y = -30 + 27

y = -3

For D

y = 2x - 15

y = 2(6) - 15

y = 12 - 15

y = -3

For E

y = -4x + 27

y = -4(6) + 27

y = -24 + 27

y = 3

From the above, the equation that satisfy (6, -3) are:

Thus, the correct answer to the question is Option C and D

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The rate of Change of Function A is 1/2 and function B is 3/2.

We have to the average rate of change of each function from x=2 to x=4.

For Function A:

Here, f(2)= 1 and f(4) = 2

So, the rate of change

= f(4)- f(2)/ (4-2)

= (2-1)/ 2

= 1/2

Function B:

Here, f(2)= 4 and f(4) = 7

So, the rate of change

= f(4)- f(2)/ (4-2)

= (7- 4)/ 2

= 3/2

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The first four terms of the Maclaurin series of f are 8, 5x, 5x², and 6x³.

To discover the Maclaurin arrangement of f(x), we ought to utilize the equation:

f(x) = f(0) + f'(0)x + (f''(0)²) / 2! + (f'''(0)x³ / 3! + ...

where f(0), f'(0), f''(0), and f'''(0) are the values of the work and its subordinates assessed at x = 0.

Utilizing the given values, we have:

f(0) = 8, f'(0) = 5, f''(0) = 10, f'''(0) = 36

Substituting these values within the equation, we get:

f(x) = 8 + 5x + (10²) / 2! + (36³) / 3! + ...

Rearranging the terms, we get:

f(x) = 8 + 5x + 5² + 6x³ + ...

Subsequently, the primary four terms of the Maclaurin arrangement of f(x) are:

8, 5x, 5x², 6x³.

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To find all vectors in R3 orthogonal to ū = (-1,1,2) which are a linear combination of vectors ū1 = (1,0,1) and ū2 = (2,2,1), we can use the cross product of ū1 and ū2 to get a vector that is orthogonal to both ū1 and ū2. Then, we can use the dot product to find the scalar multiple of that vector that is orthogonal to ū.

First, we find the cross product of ū1 and ū2:

ū1 x ū2 = (2,-1,-2)

This vector is orthogonal to both ū1 and ū2. To find the scalar multiple of this vector that is orthogonal to ū, we take the dot product:

(2,-1,-2) · (-1,1,2) = 0

This tells us that any scalar multiple of (2,-1,-2) is orthogonal to ū. Therefore, any linear combination of ū1 and ū2 that is a scalar multiple of (2,-1,-2) will also be orthogonal to ū.

To find the 2-norm of these vectors, we can use the formula:

||x|| = sqrt(x1^2 + x2^2 + x3^2)

Let's call the scalar multiple of (2,-1,-2) k:

k(2,-1,-2) = (2k, -k, -2k)

To find the value of k that gives a 2-norm of 5, we set ||k(2,-1,-2)|| = 5:

sqrt((2k)^2 + (-k)^2 + (-2k)^2) = 5

Simplifying this equation, we get:

sqrt(9k^2) = 5

3k = 5

k = 5/3

Therefore, the vector that is a linear combination of ū1 and ū2 and is orthogonal to ū and has a 2-norm of 5 is:

(2/3, -5/3, -10/3)

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Since the posterior distribution is normal, the conditional expectation E[θ|X] is also a linear function of X.

Therefore, if 8(X)

(a)

If 8(X) is an unbiased estimate of 0, then we have E[8(X)] = 0, which means that ∫ 8(x)Pe(x)dx = 0 for all possible values of 0.

Now, the Bayes estimate with respect to quadratic loss is given by

δ(X) = argmin (E[(δ(X) - θ)^2|X]) = E[θ|X]

It can be shown that the Bayes estimate with respect to quadratic loss is the conditional expectation of θ given X.

Now, if δ(X) = 8(X), then we have

E[(δ(X) - θ)^2|X] = E[(8(X) - θ)^2|X]

= E[(8(X) - E[θ|X] + E[θ|X] - θ)^2|X]

= E[(8(X) - E[θ|X])^2|X] + E[(E[θ|X] - θ)^2|X] + 2E[(8(X) - E[θ|X])(E[θ|X] - θ)|X]

= Var[θ|X] + (E[θ|X] - θ)^2

where the last equality follows from the fact that 8(X) is an unbiased estimate of θ, and hence, E[8(X) - θ|X] = 0.

Since we are using quadratic loss, the above expression needs to be minimized with respect to δ(X), which is equivalent to minimizing Var[θ|X] + (E[θ|X] - θ)^2.

It can be shown that the minimum is achieved when δ(X) = E[θ|X].

Therefore, if 8(X) is the Bayes estimate with respect to quadratic loss, then we must have 8(X) = E[θ|X] for all possible values of X.

This means that the posterior distribution of θ given X is degenerate, i.e., P[δ(X) = θ|X] = 1 for all possible values of X.

Conversely, if P[δ(X) = θ|X] = 1 for all possible values of X, then δ(X) = E[θ|X] for all possible values of X.

This means that 8(X) is the Bayes estimate with respect to quadratic loss, and it is also an unbiased estimate of θ.

(b)

Suppose Pe = N(0,02%). Then, we have

E[θ^2] = Var[θ] + E[θ]^2 = 0.02

Since E[θ^2] < [infinity], we can conclude that Var[θ] < [infinity].

Now, suppose there exists a prior distribution π such that X is a Bayes estimate with respect to quadratic loss. Then, we must have

8(X) = E[θ|X]

It can be shown that if Pe = N(0,02%), then the posterior distribution of θ given X is also normal with mean

μ = (0.02/(0.02 + nσ^2))x

and variance

σ^2 = (0.02σ^2)/(0.02 + nσ^2)

where n is the sample size and σ^2 is the variance of Pe.

Since the posterior distribution is normal, the conditional expectation E[θ|X] is also a linear function of X.

Therefore, if 8(X)

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The form of the following quadratic include the following: D. not a quadratic.

In Mathematics and Geometry, the standard or general form of a quadratic function can be modeled and represented by using the following quadratic equation;

y = ax² + bx + c

Where:

Mathematically, the vertex form of a quadratic equation is given by this formula:

f(x) = a(x - h)² + k

Where:

Additionally, the intercept form of a quadratic equation is given by this formula:

f(x) = a(x - p)(x - q)

In conclusion, we can logically deduce that the given expression is a polynomial function.

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The sum of the coefficients in the simplified polynomial is -54.

Adding two integers always results in an integer, if the two integers are positive, their sum will be positive, if two integers are negative, they will yield a negative sum)

To find the sum of the coefficients of the simplified polynomial, first, distribute the constants and then combine like terms.

The given polynomial is:

[tex]$3(x^{10} - x^7 2x^3 - x 7) 4(x^3 - 2x^2 - 5)$[/tex]

Distribute the constants:

[tex]$3x^{10} - 3x^7 - 6x^3 - 3x - 21 + 4x^3 - 8x^2 - 20$[/tex]
Combine like terms:

[tex]$3x^{10} - 3x^7 + (-6x^3 + 4x^3) + (-8x^2) + (-3x) + (-21 - 20)$[/tex]

Which simplifies to:

[tex]$3x^{10} - 3x^7 - 2x^3 - 8x^2 - 3x - 41$[/tex]

Now, sum the coefficients:

[tex]$3 - 3 - 2 - 8 - 3 - 41 = -54$[/tex]

So, the sum of the coefficients in the simplified polynomial is -54.

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Answer:

[tex]f(x)=\frac{4x+3}{2x}[/tex]

Step-by-step explanation:

We are given the following function: [tex]f(x)=\frac{8x^2+2x-3}{4x^2-2x}[/tex], and we want to simplify it.

Starting with the numerator, we can factor 8x² + 2x - 3 to become (2x-1)(4x+3).

We can also pull out 2x from the denominator to get 2x(2x-1).

Now, our function will look like:

[tex]f(x)=\frac{(2x-1)(4x+3)}{2x(2x-1)}[/tex]

We can cancel 2x-1 from both the numerator and denominator.

We are left with:

[tex]f(x)=\frac{4x+3}{2x}[/tex]

Answer:

  (a)  S = {1, 2, 3, 4, 5, 6, 7}

Step-by-step explanation:

You want the sample space for rolling a 7-sided die.

The sample space is the list of all possible outcomes.

Possible outcomes from rolling a 7-sided die are any of the numbers 1 through 7.

The sample space is ...

  S = {1, 2, 3, 4, 5, 6, 7} . . . . . choice A

<95141404393>

a) This state-diagram corresponds to a birth-death process because the transitions only depend on the current state and not on any previous history of the system. b) We can sum over all values of mp(n) = ∑p(n,m). c. This system can be modeled as a birth-death process, where the states represent the number of taxis and the number of people waiting in line.

Steady-state probabilities of waiting passengers and taxis can be found using balance equations and summing probabilities for the respective cases

a. To draw the state-diagram for this system, we need to identify the different states of the system. In this case, the states are the number of taxis and the number of people waiting in line. Let's denote the number of taxis by n and the number of people waiting in line by m. The states can be represented as (n,m).

For each state, there are two possible transitions: a taxi can arrive, or a passenger can board a taxi. If a taxi arrives, the system moves to state (n+1,m) with probability μ, if there is room for the taxi. If there is no room, the taxi departs immediately and the system moves to state (n,m) with probability λ. If a passenger boards a taxi, the system moves to state (n,m-1) with probability μ. If there are no passengers waiting, the taxi joins the queue and the system moves to state (n+1,m) with probability λ.

This state-diagram corresponds to a birth-death process because the transitions only depend on the current state and not on any previous history of the system.

b. To find the steady-state probability of having n persons waiting in line, we need to use the balance equations. Let p(n,m) be the steady-state probability of being in state (n,m). Then, the balance equations are:

λp(n-1,m) + μp(n,m-1) = (λ+p)m(n,m) + μ(n+1)p(n+1,m)

for n >= 0 and m >= 0. We also have the normalization condition:

∑p(n,m) = 1.

We can solve these equations to find the steady-state probabilities. In this case, we are interested in the probabilities of having n persons waiting in line, so we can sum over all values of m:

p(n) = ∑p(n,m).

c. To find the steady-state probability of having m taxis waiting in the taxi stand, we can use a similar approach. The balance equations are:

λp(n-1,m) + μp(n,m-1) = λ(n+1)p(n+1,m) + (μ+p)m(n,m)

for n >= 0 and m >= 0. We can solve these equations to find the steady-state probabilities. In this case, we are interested in the probabilities of having m taxis waiting in the stand, so we can sum over all values of n:

p(m) = ∑p(n,m).

Overall, this system can be modeled as a birth-death process, where the states represent the number of taxis and the number of people waiting in line. We can use the balance equations to find the steady-state probabilities of having n persons waiting in line or m taxis waiting in the stand.

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In problem 2, we are comparing the Lagrange form of interpolation polynomial and the Newton form of the interpolating polynomial of degree 3. To solve this problem, we first need to understand the concepts of interpolation, polynomial, and Lagrange.

A set of basis polynomials are used to create the interpolating polynomial in the Lagrange method of polynomial interpolation.

Returning to issue 2, we are given the degree 3 interpolating polynomial, which is a degree 3 polynomial that traverses a specified set of data points.

We are asked to contrast this polynomial with the interpolation polynomial in the Lagrange form.

Another approach to creating a polynomial that traverses a given set of data points is to use the Lagrange form of interpolation polynomials.

We must assess the degree 3 interpolating polynomial and the Lagrange form of the interpolation polynomial at the specified point p(0) in order to compare the two findings.

In conclusion, we can say that to compare the Lagrange form of interpolation polynomial and the Newton form of the interpolating polynomial of degree 3, we need to evaluate both polynomials at the given point and choose the one that gives the same value as the data point.

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The number of people at the party who play basketball and are under six feet tall, |B∩U] = 31 . The probability that a randomly chosen party-goer plays basketball and is under six feet tall, P(BU) = 0.732 .

Using the formula: |B∩U| = |B| + |U| - |B∪U|

where, |B| = 30 and |U| = 15 .

|B∪U| = |B| + |U| - |B∩U| + |(not B)∩(not U)|

where, |(not B)∩(not U)| = 9

|B∪U| = 30 + 15 - |B∩U| + 9

|B∪U| = 54 - |B∩U|

So, |B∩U| = 30 + 15 - |B∪U|

|B∪U| = 30 + 15 - |B∩U| + 9

|B∩U| = 36 - |B∪U|

Substituting |B∪U| into the earlier equation:

|B∩U| = 30 + 15 - (36 - |B∪U|)

|B∩U| = 9 + |B∪U|

Using the equation above:

|B∪U| = |B| + |U| - |B∩U| + |(not B)∩(not U)|

Substituting this into the earlier equation:

|B∩U| = 9 + (54 - |B∩U|)

2|B∩U| = 63

|B∩U| = 31.5

Therefore, the number of people at the party who play basketball and are under six feet tall, |B∩U|, is approximately 31.

To find the probability, P(B∩U),

P(B∩U) = |B∩U|/|S|

where |S| is the size of the sample space = 43

Substituting the value of |B∩U|:

P(B∩U) = 31.5/43

P(B∩U) ≈ 0.732

Therefore, the probability that a randomly chosen party-goer plays basketball and is under six feet tall, P(B∩U), is 0.732.

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The required dimensions are as follows

coordinates of point M (1, 2.5)

PQ = 4

QR = 5.4

PM = 3.9

OM = 2.7

The perimeter of the parallelogram = 18.8

angle QMP = 60 degrees

Angle ROP =  100 degrees

The dimensions are calculated by plotting the coordinates and measuring the dimensions from the graph.

From the graph we can see that

PQ = 4

QR = 5.4

PM = 3.9

OM = 2.7

The perimeter of the parallelogram

= 2(4 + 5.4)

= 18.8

angle QMP = 180 - angle QMR = 180 - 120 = 60 degrees

Angle ROP = 180 - angle QRO = 180 - 80 = 100 degrees

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The exact values of the variables are;

x = 9

y =14.5

To determine the value of the variables, we have that the trigonometric identities are;

From the diagram shown, we can se that the triangle is an isosceles triangle

An  isosceles triangle has two of its sides and angles equal to each other.

Then, the value of the variable x would be;

x = 18/2 = 9

Using the Pythagorean theorem;

15²- 9² = y²

find the square value

y² = 225 - 16

y² = 209

Find square root

y = 14. 5

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To find the total number of different routes from town A to town C, we can first find the number of different routes from A to B and then multiply it by the number of different routes from B to C. There are 7 different roads between A and B and 4 different roads between B and C. Therefore, the total number of different routes from A to C is 7 x 4 = 28.

(b) To find the total number of different routes from town A to town C and back, we can use the product rule. There are 28 different routes from A to C (as calculated in part a) and 28 different routes from C to A (since we can use any road once in each direction). Therefore, the total number of different routes from A to C and back is 28 x 28 = 784.

(c) To find the total number of different routes from town A to town C and back in part (b) that visit town B at least once, we can use the principle of inclusion-exclusion. There are 28 different routes from A to C and 28 different routes from C to A. However, we need to subtract the routes that do not visit B at all. To find this number, we can use the product rule again, since there are 5 different roads between A and C that do not go through B (2 from A to C and 3 from C to A). Therefore, the number of routes that do not visit B at all is 2 x 3 = 6. So, the total number of different routes from A to C and back in part (b) that visit B at least once is 28 x 28 - 6 = 784 - 6 = 778.

(d) To find the total number of different routes from town A to town C and back in part (b) that do not use any road twice, we can use the principle of permutations. Since we cannot use any road twice, we need to find the number of permutations of the roads. There are 7 roads between A and B, 4 roads between B and C, and 2 roads between A and C. Therefore, the total number of different routes from A to C and back in part (b) that do not use any road twice is 7P2 x 4P2 x 2P2 = 126 x 12 x 2 = 3024.

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The amount of a restaurant charge if the ingredients cost $10 is,

⇒ $35

We have to given that;

A restaurant should charge its customers about 3. 5 times the cost of the ingredients.

Hence, We get;

The amount of a restaurant charge if the ingredients cost $10 is,

⇒ 3.5 x $10

⇒ $35

Thus, The amount of a restaurant charge if the ingredients cost $10 is,

⇒ $35

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a) The probability that three tubes are defective is approximately 0.0146, or 1.46%.

b) The probability that at least four tubes are defective is 0.4686 or 46.86%.

To solve this problem, we can use the binomial probability formula:

P(X = k) = (n choose k) * p^k * (1-p)^(n-k)

where X is the number of defective tubes, n is the total number of tubes inspected, p is the probability that a tube is defective, and (n choose k) is the binomial coefficient, which represents the number of ways to choose k items out of n.

(a) To find the probability that three tubes are defective out of six, we can plug in n = 6, k = 3, and p = 0.1 into the formula:

P(X = 3) = (6 choose 3) * 0.1^3 * 0.9^3
          = 20 * 0.001 * 0.729
          = 0.01458

Therefore, the probability that three tubes are defective is approximately 0.0146, or 1.46%.

(b) To find the probability that at least four tubes are defective out of six, we can use the complementary probability:

P(X >= 4) = 1 - P(X < 4)

To find P(X < 4), we can add up the probabilities of having zero, one, two, or three defective tubes:

P(X < 4) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)
               = (6 choose 0) * 0.1^0 * 0.9^6 + (6 choose 1) * 0.1^1 * 0.9^5 + (6 choose 2) * 0.1^2 * 0.9^4 + (6 choose 3) * 0.1^3 * 0.9^3
               = 0.53144

Therefore, P(X >= 4) = 1 - 0.53144 = 0.46856, or approximately 46.86%.

So the probability that at least four tubes are defective is 0.4686 or 46.86%.

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There are 720 different ways to position six individuals in a line for a photo.

From the information, the number of ways six people can be placed in a line for a photo can be determined using the expression 6!.

6! is the factorial of 6, which is the sum of all positive numbers ranging from 1 to 6. So,

6! = 6 x 5 x 4 x 3 x 2 x 1

When we simplify this expression, we get:

6! = 720

As a result, there are 720 different ways to position six individuals in a line for a photo.

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In the given triangle, the measure of angle A is approximately 55°

From the question, we are to determine the measure of angle A

To determine the measure of angle A, we will use SOH CAH TOA

sin (angle) = Opposite / Hypotenuse

cos (angle) = Adjacent / Hypotenuse

tan (angle) = Opposite / Adjacent

Thus,

We can write that

sin (A) = BC / AB

First, we will determine the length of BC

From the Pythagorean theorem,

BC² = AB² - AC²

BC² = 37² - 21²

BC² = 928

BC = √928

BC = 4√58

Thus,

sin (A) = (4√58) / 37

sin (A) = 0.8233

A = sin⁻¹ (0.8233)

A = 55.4165°

A ≈ 55°

Hence,

The measure of angle A is 55°

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Answer:

To find the degree of the product, we need to multiply the highest degree terms of the two factors.

In this case, the two factors are -2x^2 and (4x^3 - 5x^2).

The highest degree term in -2x^2 is -2x^2 itself, which has a degree of 2.

The highest degree term in (4x^3 - 5x^2) is 4x^3, which has a degree of 3.

When we multiply these terms, we get:

-2x^2 * 4x^3 = -8x^(2+3) = -8x^5

Therefore, the degree of the product is 5.

The answer is D) 5.

Step-by-step explanation:

highest exponent number

Step-by-step explanation:

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Therefore, the standard form polynomial expression that represents the area of the triangle is: [tex](3/2)g^2h - 3gh + h[/tex].

The expression [tex]3g^2 - 6g + 2[/tex] does not represent the area of a triangle because it is not in the form of a polynomial expression that represents the area of a triangle. The area of a triangle is given by the formula:

A = (1/2)bh

Here A is the area, b is the base of the triangle, and h is the height of the triangle.

To write a polynomial expression in standard form that represents the area of a triangle, we need to simplify the formula for A using algebra. Let's assume that [tex]3g^2 - 6g + 2[/tex] represents the base of the triangle and h represents the height of the triangle. Then, we have:

A =[tex](1/2)(3g^2 - 6g + 2)h[/tex]

A =  [tex](3/2)g^2h - 3gh + h[/tex].

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The statement "the heights of the bars represent relative class frequencies" is true. The correct answer is C.

A histogram is a graphical representation of the distribution of numerical data. It is commonly used to display the frequency distribution of continuous data in a graphical form.

The horizontal axis of the histogram represents the range of values of the variable being measured, and this range is divided into equal intervals called bins. The vertical axis represents the frequency, or the number of times a value appears in each bin.

The statement "the heights of the bars represent relative class frequencies" is also true. In a histogram, the height of each bar represents the frequency or count of data points that fall within each bin. This height is proportional to the frequency of data points within each bin, and it is often normalized to show the relative frequency of each bin.

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100°

Supplementary angle pairs sum to 180°.

Supplementary Angles

Supplementary angle pairs form a straight line. Since straight lines have a measure of 180°, the sum of supplementary angles is always 180°. Supplementary angles do not necessarily have to be adjacent, but the angles above are. Since the angles above create a straight line together, they must be supplementary angles.

Solving for j

Now that we know that the sum must be 180°, we can create an equation to find j.

To solve this, all we need to do is subtract 80 from both sides.

Angle j must have a measure of 100°.