According to math modeling, what values cannot vary without consequence?

The solution of the equation dx = 5xt^5 dt is :

ln|x| = t^6 + C, where C is the constant of integration.

The implicit solution is:
F(t,x) = x - e^(t^6 + C) = 0, where C is an arbitrary constant.

To solve the equation dx = 5xt^5 dt, we need to separate the variables and integrate both sides.
Dividing both sides by x and t^5, we get:
1/x dx = 5t^5 dt

Integrating both sides gives:
ln|x| = t^6 + C
where C is the constant of integration.

To get the implicit solution in the form F(t,x) = C, we need to solve for x:
x = e^(t^6 + C)

Thus, the implicit solution is:
F(t,x) = x - e^(t^6 + C) = 0
where C is an arbitrary constant.

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Chebyshev's theorem says that for any set of observations, the proportion of values that lie within k standard deviations of the mean is  1 - 1/k².

In statistics, Standard deviation is a measure of the variation of a set of values.

σ = standard deviation of population

N = number of observation of population

X = mean

μ = population mean

We know that Chebyshev's theorem states that for a large class of distributions, no more than 1/k² of the distribution will be k standard deviations away from the mean.

This means that 1 - 1/k² of the distribution will be within k standard deviations from the mean.

Lets k = 1.8, the amount of the distribution that is within 1.8 standard deviations from the mean is;

1 - 1/1.8² = 0.6914

= 69.14%

Hence, Chebyshev's theorem says that for any set of observations, the proportion of values that lie within k standard deviations of the mean is  1 - 1/k².

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The sum of angles in a hexagon is 720⁰. The missing interior angles in Noah's list is 110⁰  

The sum of interior angles of a triangle is equal to 180⁰. The sum of interior angles of a polygon is equal to:

sum of interior angles of a polygon = number of triangles x 180⁰

A hexagon consists of 4 triangles, hence, the sum of interior angles in a hexagon = 4 x 180⁰ = 720⁰

In general, we can find the sum of interior angles in a polygon using the formula:

(n - 2) x 180⁰

Where n = number of sides

In the given problem, let's denote the missing interior angle as q. The sum of interior angles are:

80⁰ + 85⁰ + 95⁰ + 105⁰ + 120⁰ + 125⁰ + q = 720⁰

610⁰ + q = 720⁰

q = 720⁰ - 610⁰ =  110⁰  

The picture in your question is missing. Most likely it was like on the attached picture.

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Answer:

Step-by-step explanation:

f(x)=a(x+2)(x+7)=a(x²+2x+7x+14)

or f(x)=a(x²+9x+14)

it has zeros as -2 and -7.

The value is 24 square units is parallel to the face of the right rectangular prism.

We can see that the face of the given rectangular prism shows a width 4 and a height of 6. If we cut the figure at any point along the length 20, such that the cross-section is parallel to the face, the cross-section, which occurs at x length, will always have the same dimensions, which are 4 and 6.

So the area of the cross-section which is parallel to the face of the given rectangular prism is given by:

A = 6 × 4

A = 24

Thus, the value is 24 square units is parallel to the face of the right rectangular prism.

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A = 6 × 4

A = 24

Thus, the value is 24 square units is parallel to the face of the right rectangular prism.

The correct statement is c. The Adjusted R-squared is a measure used in multiple regression analysis that is between 0 and 1. It is different from the R-squared value in simple linear regression.

The Adjusted R-squared can decrease if the addition of another X regressor does not sufficiently lower the sum of squared residuals (SSR) relative to the impact of increasing the number of predictors (k). It measures the proportion of the variance explained by the predictors, adjusted for the number of predictors and the sample size, rather than the ratio of the sum of squared residuals to the total sum of squares. It provides a measure of how well the regression model fits the data, and it ranges between 0 and 1. A value closer to 1 indicates that a higher proportion of the variance in the dependent variable is explained by the predictors.

Adding another X regressor to the multiple regression model can impact the Adjusted R-squared. If the additional regressor does not significantly contribute to reducing the sum of squared residuals (SSR) relative to the increase in the number of predictors (k), the Adjusted R-squared can decrease. This means that the added regressor does not improve the model's ability to explain the variance in the dependent variable adequately.

However, the Adjusted R-squared does not directly measure the ratio of the sum of squared residuals to the total sum of squares. Instead, it represents the proportion of the variance explained by the predictors, adjusted for the number of predictors and the sample size. It penalizes models with a large number of predictors that may overfit the data, thereby providing a more reliable measure of the model's goodness of fit.

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a) The mode of the list is 7

b) The median of the list is 7.

c) The mean is 5.4

d) The range is 7

What is the Mean, Mode and Median?

Mean: The mean is the average of a set of numbers, calculated by adding up all the numbers and dividing by the total number of numbers in the set.

Mode: The mode is the most frequently occurring number in a set of numbers.

Median: The median is the middle value in a set of numbers when the set is sorted in ascending or descending order.

a) Mode: The mode of the list is 7, as it is the number that occurs most frequently (3 times).

b) Median: To find the median, the list must first be sorted in ascending order:

1, 2, 3, 4, 5, 7, 7, 7, 8, 8

The median of the list is 7.

c) Mean: The mean is found by adding up all the numbers in the list and dividing by the total number of items:

(3 + 7 + 2 + 4 + 7 + 5 + 7 + 1 + 8 + 8)/10 = 54/10 = 5.4

d) Range: The range is the difference between the largest and smallest numbers in the list:

8 - 1 = 7

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Answer:

the answer is A, x=2

Step-by-step explanation:

Answer:

2x+2y+10

Step-by-step explanation:

To simplify an equation you first want to combine like terms. This means that any coefficient connected to an x variable needs to be combined, so 6x plus -4x is equal to 2x. You then proceed to do the same with 2y and the 3 and 7.

Answer:

D I think

Step-by-step explanation:

one dozen is 12 so you reduce it so you make it smaller

Answer:

y < 5/3

Step-by-step explanation:

3y + 5 < 10

Let's subtract 5.

3y < 5

Okay. We have something manageable. Let's divide by 3.

y < 5/3

That's our answer.

Answer:

see explanation

Step-by-step explanation:

(3x - 1)(x + 5)

Each term in the second factor is multiplied by each term in the first factor , that is

3x(x + 5) - 1 (x + 5) ← distribute parenthesis

= 3x² + 15x - x - 5 ← collect like terms

= 3x² + 14x - 5

Answer:

its true. see below

Step-by-step explanation:

\((3x - 1)(x + 5)\)

\(3 {x}^{2} + 15x - x - 5\)

\(3 {x}^{2} + 14x - 5\)

Yes

Answer:

A. SAS

Step-by-step explanation:

\( In\:\triangle ABM \:\&\:\triangle CBM\\

\overline{AB} \cong \overline{CB}.... (given) \\

\angle ABM \cong \angle CBM....(given) \\

\overline{BM} \cong \overline{BM}.... (common) \\

\therefore \triangle ABM \:\cong\:\triangle CBM..... (SAS\: Postulate) \)

The largest angle in the triangle is approximately 108.46 degrees as the sides of the length are 745 feet.

A triangle is a closed two-dimensional shape with three straight sides and three angles. It is one of the basic shapes in geometry and is often studied in mathematics and other fields.

To find the largest angle in the triangle, we can use the Law of Cosines, which relates the lengths of the sides of a triangle to the cosine of the angles opposite those sides. The formula is:

c^2 = a^2 + b^2 - 2ab cos(C)

where c is the length of the side opposite the angle C, and a and b are the lengths of the other two sides.

In this case, we want to find the largest angle, which is opposite the longest side, 745 feet. So we can let c = 745, a = 660, and b = 540, and solve for cos(C):

745^2 = 660^2 + 540^2 - 2(660)(540)cos(C)

Simplifying and solving for cos(C), we get:

cos(C) = (745^2 - 660^2 - 540^2) / (2(660)(540))

cos(C) = -0.3245

To find the angle C, we can take the inverse cosine of -0.3245 (which gives us the angle in radians), and convert it to degrees:

C = cos(-0.3245) ≈ 1.891 radians ≈ 108.46 degrees.

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Answer:

As x approaches 6:

\( \frac{6 - x}{ {x}^{2} - 36 } = - \frac{x - 6}{(x - 6)(x + 6)} = - \frac{1}{x + 6} = - \frac{1}{6 + 6} = - \frac{1}{12} \)

The limit of the given function as x approaches 6 is -1/12. This is achieved by factoring and revising the original function, and then substituting into the revised function.

The student is asking for the limit of the function (6-x) / (x²-36) as x approaches 6. In mathematics, this is a problem of calculus and specifically involves limits. Let's solve this by first factoring the denominator to get (6-x) / ((x-6)(x+6))

By realizing we can revise the numerator as -(x-6), we make it obvious that the limit can be directly computed by substituting x=6 after canceling out the (x-6) terms. The result is -1/12, therefore the limit of the function as x approaches 6 is -1/12.

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Answer:

28 mpg

Step-by-step explanation:

Answer:

Line DC: 24

Step-by-step explanation:

All lines are parallel to each other making AB and DC; 24 and BC and AD; 33

Answer:

Subtract

5

x

from both sides of the equation.

3

x

2

+

4

−

5

x

=

0

Once the quadratic is in standard form, the values of

a

,

b

, and

c

can be found.

a

x

2

+

b

x

+

c

Use the standard form of the equation to find

a

,

b

, and

c

for this quadratic.

a

=

3

,

b

=

−

5

,

c

=

4

Step-by-step explanation:

Solve the equation for

x

by finding

a

,

b

, and

c

of the quadratic then applying the quadratic formula.

x

=

5

±

i

√

23

6

Answer:

Ratio=  7:9

Step-by-step explanation:

What is the ratio of angelfish to  seahorses?

14 angel fish : 18 seahorses

14:18 = 7:9

Answer:

f(- 5) = - 17

Step-by-step explanation:

To evaluate f(- 5) substitute x = - 5 into f(x) , that is

f(- 5) = 3(- 5) - 2 = - 15 - 2 = - 17

Answer:

$164 refund

Step-by-step explanation:

2900 x .24= $686 withheld

2900 x .18= $522 actually owed

686-522= $164

Step-by-step explanation:

This is a family of curves represented by the equation:

y = a (x + 4) (x − 2)

Different values of the a coefficient result in different quadratic functions.

The vertex of the parabolas is halfway between the zeros, at x = -1.

y = a (-1 + 4) (-1 − 2)

y = -9a

So to find the value of a, divide the y-coordinate of the vertex by -9. For example, curve A has a vertex at (-1, -3), so the value of the a coefficient is -3 / -9 = ⅓.

A. y = ⅓ (x + 4) (x − 2)

B. y = (x + 4) (x − 2)

C. y = 2 (x + 4) (x − 2)

D. y = -⅓ (x + 4) (x − 2)

E. y = -2 (x + 4) (x − 2)

The expected activity time for the given statement is = 5.33

The average amount of time required for an activity when it is repeatedly performed is known as the expected time. The weighted average of the three estimated times, i.e., the optimistic time, the most probable time, and the pessimistic time, is used in project management analysis to determine the expected time of activity.

A network model called the Program Evaluation and Review Technique (PERT) allows for randomness in the timing of activity completion. PERT was created in the late 1950s again for a massively labor-intensive Polaris project for the US Navy. It might shorten a lot of time and cost needed to finish a project.

optimistic = 2

most likely = 5

pessimistic = 10.

We will use the following formula to calculate the anticipated time for each activity in order to solve this problem:

Expected Time = (Optimistic Time + (4 x Most likely) + Pessimistic Time) / 6

Putting the values into formula:

= (2 + (4 x 5) + 10)/ 6

= (2 + 20 + 10) / 6

= 5.33

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The rats from group 2 and group 3 displayed a change in their behavior as the rats from group 2 had no motivation to run, whereas the rats from group 3 showed better performance in running through the maze once they received a reward.

Edward Tolman's study on maze running ratsThe psychologist Edward Tolman conducted a study on rats' behavior, specifically the rats' running behavior in mazes for several days. The study consisted of three groups of rats. The rats in group 1 received a food reward at the end of the maze every time they ran the maze. The rats in group 2 never received a food reward in the maze. Finally, the rats in group 3 did not receive a food reward at the end of the maze until the 11th day of the study.Different group of rats behaviorThe rats in group 1 were able to run through the maze faster as they received a food reward every time they ran through the maze. They were motivated by the food reward, and hence the incentive made them run faster.

The rats in group 2 did not receive a food reward, and hence they had no motivation to run through the maze. These rats had no reason to run faster as they knew that there was no reward in the end. Therefore, they showed slower performance in running through the maze.The rats in group 3 did not receive any reward until the 11th day of the study. They were similar to the rats in group 2, who did not receive any reward. However, on the 11th day, they received a food reward, which changed their behavior entirely.On the 12th day, the rats from group 3 showed a much faster performance in running through the maze as compared to the rats from group 2.

It is because they knew there was a reward waiting at the end, and this acted as a motivation for them.In conclusion, the rats from group 2 and group 3 displayed a change in their behavior as the rats from group 2 had no motivation to run, whereas the rats from group 3 showed better performance in running through the maze once they received a reward.

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Answer:

see explanation

Step-by-step explanation:

the standard form of a quadratic expression is ax² + bx + c ( a ≠ 0 )

(1)

(2x + 5)(x + 1)

each term in the second factor is multiplied by each term in the first factor, that is

2x(x + 1) + 5(x + 1) ← distribute parenthesis

= 2x² + 2x + 5x + 5 ← collect like terms

= 2x² + 7x + 5 ← in standard form (a = 2, b = 7, c = 5 )

(2)

(x - 2)(x + 2)

= x(x + 2) - 2(x + 2) ← distribute parenthesis

= x² + 2x - 2x - 4 ← collect like terms

= x² - 4 ← in standard form (a = 1, b = 0, c = - 4 )

6) The solution of the system of linear equations is (x, y, z) = (2, 5, 3).

11) The average depth of the water is 0.35 kilometers.

12) The dollar value of the deposit after 10 years is $ 1205.85.

13) Three horses need a consumption of 930 pounds of hay for the month of July.

14) The circle with equation x² + y² + 8 · y + 8 · y + 28 = 0 has a radius of 2.

15) Anna has a mean time of 7.39 minutes.

In this question we must analyze and resolve on algebraic equations such as linear equations or conic sections. 6) We must use algebra properties to solve on the system of linear equations. First, we clear x in the first equation:

x = y - z

Then, we apply it in the two remaining equations:

- 5 · (y - z) + 3 · y - 2 · z = - 1

2 · (y - z) - y + 4 · z = 11

- 2 · y + 3 · z = - 1

y + 2 · z = 11

Second, we clear y in the second expression and we substitute into the first expression:

y = 11 - 2 · z

- 2 · (11 - 2 · z) + 3 · z = -1

- 22 + 7 · z = - 1

z = 3

y = 5

x = 2

The solution of the system of linear equations is (x, y, z) = (2, 5, 3).

11) There is a function of the speed of a tsunami in terms of the average depth of the water. The former variable is known and we need to clear d in the formula to find the missing value:

145 = 356 · √d

d = (145 / 356)²

d = 0.345 km

The average depth of the water is 0.35 kilometers.

12) The compound interest model is shown below:

C' = C · (1 + r / 100)ˣ      (1)

Where:

If we know that C = 500, r = 4.5 and x = 20, then the resulting capital after 10 years is:

C' = 500 · (1 + 4.5 / 100)²⁰

C' = 1205.85

The dollar value of the deposit after 10 years is $ 1205.85.

13) The situations indicates a direct variation as the amount of hay is directly proportional to the number of days. Hence, we have the following linear model for the hay consumption of one horse:

y = m · x        (2)

y = 10 · x

Where:

The total consumption of three horses during July is equal to the product of the number of horses and consumed hay by one horse during one month:

y' = 3 · [10 · (31)]

y' = 930

Three horses need a consumption of 930 pounds of hay for the month of July.

14) There is the general equation of the circumference and we must transform it into its vertex form to find information about the radius. This can done by algebraic procedures:

x² + y² + 8 · y + 8 · y + 28 = 0

(x² + 8 · y) + (y² + 8 · y) = - 28

(x² + 8 · y + 16) + (y² + 8 · y + 16) = 4

(x + 4)² + (y + 4)² = 2²

The circle with equation x² + y² + 8 · y + 8 · y + 28 = 0 has a radius of 2.

15) We need to sum all the times described in the table and divide it by the number of data to find the mean time for a 1-kilometer race:

x = (7.25 + 7.40 + 7.20 + 7.10 + 8.00 + 8.10 + 6.75 + 7.35 + 7.25 + 7.45) / 10

x = 7.39

Anna has a mean time of 7.39 minutes.

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The required total cost of packaging each comforter is $89.20.

Activity estimated indirect activity costs allocation base estimated quantity of allocation base,

materials handling $ 12,600 number of parts 4,200 parts

Cost per part = $ 12,600/4,200 =  $3

assembly$ 55,440 number of parts 4,200 parts,

Cost per part = $ 55,440/4,200 =  $13.20

packaging $10,920 number of comforters 1,050 comforters each comforter consists of 4 parts

Cost per part =$10,920 /1,050 = $10.40

Then, For all cost of 4 parts,

Materials handling = ($3 x 4) = $12

Assembly = ($13.20 x 4) = $52.80

Packaging = ($10.40 x 1) = $10.40

Total overhead cost = $75.20

And Direct materials cost = $14.00

So, total manufacturing cost =  $75.20 + $14.00 =  $89.20

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Answer: 10

Step-by-step explanation:

Since both points have the same y value, we just need to find the change of x, which would be the distance of the points.

Reading the points from left to right on an imaginary graph, point B would come first as it has the lesser x value.

To find the change of x subtract the x value of the second point from the first, so...

6 - (-4) = 10

The change of x = 10

The distance between the points is 10

Hope this helps!

Answer:

x= -1

Step-by-step explanation:

p= x² +4x -2 -----(1)

q= 2x -1 ------(2)

q -p= 2 -----(3)

Substitute (1) and (2) into (3):

2x -1 -(x² +4x -2)= 2

2x -1 -x² -4x +2= 2 (Expand bracket)

-x² -2x +1=2 (Simplify)

x² +2x +2 -1= 0 (Bring all terms to one side)

x² +2x +1= 0

(x +1)²= 0 (Factorise)

x +1= 0 (Square root both sides)

x= -1 (-1 on both sides)