if you wanted to visualize the change in the mean test score for the same exam over multiple semesters which visualizations might be used? a. bar chart b. pie chart c. histogram d. line chart

Answers

Answer 1

if you wanted to visualize the change in the mean test score for the same exam over multiple semesters line chart will be used.

A line chart connects a number of data points with a continuous line to graphically depict the historical price movement of an item. The simplest sort of chart used in finance, it often merely shows the closing prices of a security over time.

A line chart, also known as a line graph or a line plot, uses a line to link a group of data points. This type of graph uses sequential values to show trends. The x-axis (horizontal axis) often shows a succession of numbers in consecutive order.

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Upon discovering a tree virus in British Columbia, scientists created a model to predict the tree population in a certain forest: T=x(0.73)m, where T represents he number of trees after m months since the virus's discovery, and x represents the original number of trees that existed in the forest when the scientists made the discovery. Assuming that the model is correct, which of the following best describes the impact of the virus on the forest?
The number of trees in the forest is decreasing by 27% each month.
The number of trees in the forest is decreasing by 73 each month.
The number of trees in the forest is decreasing by 27 each month.
The number of trees in the forest is decreasing by 73% each month.

Answers

The impact of the virus on the forest is a decrease of 73 trees per month, or a decrease of 73% each month.

The formula for predicting the number of trees after m months since the virus's discovery is T=x(0.73)m, where T represents the number of trees, x represents the original number of trees that existed in the forest when the scientists made the discovery, and m represents the number of months since the virus's discovery.

For example, if the original number of trees in the forest was 100 and the virus was discovered 3 months ago, then the model predicts that the number of trees in the forest after 3 months since the virus's discovery is T = 100(0.73)3 = 51.7. This means that the number of trees in the forest decreased by 48.3 (100-51.7) over the 3 months since the virus's discovery, which is equivalent to a decrease of 48.3/100 = 0.483 = 48.3%. This also means that the number of trees in the forest is decreasing by 48.3% = 0.483 each month, which is equivalent to a decrease of 73 trees per month (100 x 0.483).

Therefore, the impact of the virus on the forest is a decrease of 73 trees per month, or a decrease of 73% each month.

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according to the text, the fact that multiple models of abnormality exist is caused by all of these except:

Answers

The fact that multiple number of models of abnormality exist is caused by cultural and social values, cognitive bias, biological factors and limited research. Therefore, the answer is B. Cognitive bias.

The fact that multiple number of models of abnormality exist is caused by a variety of factors. Cultural and social values play a key role in influencing how mental health is viewed and understood. Biological factors, such as genetic predispositions and changes in the brain, can also contribute to psychological distress. Limited research on the subject has led to many different models of abnormality being developed, each with its own unique set of criteria for diagnosing mental health disorders. However, cognitive bias, or the tendency to think of certain behaviors and thoughts as abnormal, is not a major cause of the existence of multiple models of abnormality.

the complete question is :

according to the text, the fact that multiple models of abnormality exist is caused by all of these except:

A. Cultural and social values

B. Cognitive bias

C. Biological factors

D. Limited research

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The function f(x) = 5x + 35 represents the distance in miles a drone flew.

The function g(x) = x + 7 represents the time the drone flew in hours.

Part A: Find f(3) and g(3). Show your work. (2 points)

Part B: Find (f/g) divided by g of 3. Show your work. (2 points)

Part C: What is the domain of f divided by g of (f/g) x? (2 points)

Answers

a) The numeric values of each function at x = 3 are given as follows:

f(3) = 50.g(3) = 10.

b) The division is given as follows: f(3)/g(3) = 5.

c) The domain of f(x)/g(x) is given as all real values except x = -7, as the function g(x), which is the denominator of the division, assumes a value of 0 at x = -7.

How to find the numeric value of a function or of an expression?

To find the numeric value of a function or of an expression, we replace each instance of the variable in the function or in the expression by the value at which we want to find the numeric value.

Hence the numeric values are found replacing the lone instance of x by 3 in each function, as follows:

f(3) = 5(3) + 35 = 15 + 35 = 50.g(3) = 3 + 7 = 10.

Hence the division is given as follows:

(f/g)(3) = f(3)/g(3) = 50/10 = 5.

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A bicycle is traveling at 19 miles per hour.
How many feet will it cover in 30 seconds?
Round your answer to the nearest tenth of a foot.

Answers

The distance covered by the bicycle is 0.2 miles.

How to find the distance covered?

A bicycle is traveling at 19 miles per hour. The number of feet the bicycle will cover in 30 seconds can be calculated as follows:

Therefore,

speed = distance / time

Hence, let's find the distance covered by the bicycle using the data given:

speed = 19 miles per hour

time = 30 seconds = 0.00833333 hours

Therefore,

distance covered = speed × time

distance covered = 19 × 0.00833333

distance covered = 0.15833327

distance covered = 0.2 miles

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Find the y-intercept and the slope of the line.

y= -2/5x+6

Answers

The answer is Six

for Y-intercept, x is equal to zero therefore y is equal to six

Answer:

-2/5

Explanation:

The equation is written in slope-intercept form, aka y = mx + b, where m is the slope and b is the y-intercept.

In slope intercept, the slope is always the number that comes before x.

In other words, it is the coefficient of x.

For this equation, the coefficient of x is -2/5. Hence -2/5 is the slope.

As for the y-intercept, that is a constant in the equation.

For this equation, the constant is 6. Hence, the y intercept is 6.

the central limit theorem allows us to use the normal distribution to make inferences concerning the population mean group of answer choices if the population is normally distributed and the sample size is reasonably large. if the sample size is reasonable large (for any population) if the population is normally distributed (for any sample size) if the population size is reasonably large (whether the population distribution is known or not)

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The Central Limit Theorem states that if the population is normally distributed and the sample size is reasonably large, then the sample mean will be normally distributed.

The Central Limit Theorem states that if the sample size is reasonably large and the population is normally distributed, then the sample mean will be normally distributed. This means that we can use the normal distribution to make inferences about the population mean. Specifically, it allows us to calculate the probability that the population mean falls within a certain range, given the sample mean. This is useful because we can use the sample data to make assumptions about the population as a whole. For example, if the sample data is normally distributed, we can assume that the population mean is also normally distributed. This is especially useful when the population size is large and it would be difficult to collect data from every individual in the population. The Central Limit Theorem gives us an efficient way to make inferences about the population mean.

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A particle can move along only an x axis, where conservative forces act on it (Fig. 8âˆ’66 and the following table). The particle is released at x=5.00m with a kinetic energy of K=14.0J and a potential energy of U=0. If its motion is in the negative direction of the x axis, what are its (a) K and (b) U at x=2.00m and its(c) K and (d) U at x=0 ? If its motion is in the positive direction of the x axis, what are its (e) K and (f) U at x=11.0m, its (g) K and(h) U at x=12.0m, and its (i) K and ( j) U at x=13.0m? (k) Plot U(x) versus x for the range x=0 to x=13.0m.
Next, the particle is released from rest at x=0. What are (l) its kinetic energy at x=5.0m and (m) the maximum positive position x max it reaches? (n) What does the particle do after it reaches x = max ?

Answers

The remark in the problem is the statement that the forces can be associated with potential energies is explained as follows: the work from x=3.00m to x=2.00m is

W=F₂ Δx=(5.00N)(−1.00m)=−5.00J,

so the potential energy at x=2.00m is U₂=+5.00J.

(b Now, we should evident from the problem statement that Emax =14.0J, so the kinetic energy at x=2.00m is the kinetic energy at x=2.00m is

K₂=Emax−U₂=14.0−5.00=9.00J.

U₀=6.00J+U₂=(6.00+5.00)J=11.0J.

(d) Similar to reasoning presented in part (a) then gives

K₀=Emax−U₀=(14.0−11.0)J=3.00J.

(e) The work from x=8.00m to x=11.0m is

W=F₃Δx=(−4.00N)(3.00m)=−12.0J,

so the potential energy at x=11.0m is U₁₁=12.0J.

(f) The kinetic energy at x=11.0m is therefore

K₁₁=Emax−U₁₁=(14.0−12.0)J=2.00J.

(g) Now we have W=F₄Δx=(−1.00N)(1.00m)=−1.00J, so the potential energy at x=12.0m is

U₁₂=1.00J+U₁₁=(1.00+12.0)J=13.0J.

(h) Thus, the kinetic energy at x=12.0m is

K₁₂=Emax−U₁₂=(14.0−13.0)=1.00J.

(i) T There is no work done in the interval of x=12.0m to x=13.0m so the answers are the same as in part (g): U₁₂=13.0J.

.(j) In this also there is no work done in this interval so the answers are the same as in part (h): K₁₂=1.00J.

(k) Although the plot is not shown here, it would look like a “potential well” with piecewise-sloping sides: from x=0 to x=2 the graph of U is decreased from the line segment with 11 to 5, and from x=2 to x=3

it may be headed down to zero, where it stays until x=8, where it starts to increase to a value of 12 at which x=11, and in another positive-slope line segment it increased to the value of 13 at x=12.

For x>12 it is a value that does not change.

(l) The particle can be thought of as “falling” down the 0<x<3 slopes of the well, gaining kinetic energy as it does so, and certainly is able to reach x=5. Since U=0 at x=5, then its initial potential energy (11J) has completely converted to kinetic: now K=11.0J.

(m) This is not sufficient to climb up and out of the well on the large x side (x>8), but does allow it to reach a “height” of 11 at x=10.8m. As discussed in sections 8−5, this is a “turning point” of the motion.

(n) Next it “falls” back down and rises back up the small x slope until it comes back to its original position. Stating this more carefully, when it is stopped at x=10.8m it is accelerated to the left by the force F₃.

it gains enough speed as a result that it eventually is able to return to x=0, where it stops again.

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Please help me answer this :)
extra points

Answers

It is, indeed, a function. The function domain is {3,6,12,18} and the function range is {5,7,9,10}.

What is function?

A function is an equation with just one solution for y for every x. A function produces exactly one output for each input of a certain type. Instead of y, it is usual to call a function f(x) or g(x). f(2) indicates that we should discover our function's value when x equals 2. Example. A function is a type of rule that produces one output for one input. Alex Federspiel provided the image. y=x2 is an example of this. If you enter anything for x, you will only get one output for y. Because x represents the input value, we may say that y is a function of x.

Here,

domain={3,6,12,18}

range={5,7,9,10}

Yes, it is a function. The domain of function is {3,6,12,18} and range of function is {5,7,9,10}.

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sin ø = — 48/73 and cos ø = 55/73. find tan ø

Answers

Answer:

138

Step-by-step explanation:

i took the same quiz.

we use a scatter plot to display the relationship between two numerical variables. we can expand the usage of the scatter plots to include a categorical variable. if we plot property values against square footage, then we anticipate a positive relationship between these two variables. which of the following describes the usage of scatter plots that include a categorical variable?

Answers

Grouped/color-coded scatter plot: a scatter plot with a third categorical variable added, shown by color or shape, to visualize relationships between two numerical variables.

Scatter plots that include a categorical variable are known as a "Grouped Scatter Plot" or a "Color-Coded Scatter Plot". In these plots, the points on the scatter plot are color-coded or shaped according to a third categorical variable, allowing for an easy visualization of the relationship between two numerical variables while taking into account the categorical variable.

Grouped scatter plots can help to visualize patterns and trends in the data that might not be immediately apparent in a regular scatter plot. For example, you can use a scatter plot to compare the relationship between the two numerical variables for different categories. This can give insights into how the relationship between the variables changes across the different categories, and can help to identify any outliers or exceptions to the general trend.

In a color-coded scatter plot, the color of each point on the plot represents the value of the categorical variable. This can help to quickly identify patterns and trends in the data based on the color of the points, and can make it easier to see how the relationship between the two numerical variables varies across different categories.

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Show your calculations. 1. Jason bought 200 T-shirts at R10 each. It cost him another RS to screen print each T-shirt. He sold all his T-shirt at R35 each. How much profit did he make? which she calls at 850 each

Answers

Answer:

Step-by-step explanation:

To calculate Jason's profit, we can subtract his total expenses from his total revenue.

First, let's calculate the cost of the T-shirts:

200 T-shirts * R10 each = R2000

Next, let's calculate the cost of screen printing:

200 T-shirts * R1 to screen print each = R200

Now, let's calculate the total cost:

R2000 + R200 = R2200

Next, let's calculate Jason's total revenue:

200 T-shirts * R35 each = R7000

Finally, let's subtract the total cost from the total revenue to find the profit:

R7000 - R2200 = R4800

So Jason made a profit of R4800 by selling 200 T-shirts.

Note: It seems there is a typo in the question as it mentions "which she calls at 850 each", which doesn't seem to be related to the calculation of Jason's profit.

The magnitude and direction of vectors t, u, and v are shown in the table.

Vector Magnitude Direction
t 5 250°
u 6 60°
v 12 330°

What is the direction of t + u + v? Round to the nearest degree.
335°
305°
155°
213°

Answers

The direction of t+ u+ v is 155°.

What is a vector?

A vector is a quantity that possesses magnitude, direction, and adheres to the law of vector addition.

Given:

The magnitude and direction of vectors t, u, and v are shown in the table.

Vector Magnitude Direction

t 5 250°

u 6 60°

v 12 330°

The coordinates of the resultant vectors:

t + u + v,

= (5 cos250° + 6cos60° + 12cos330°, 5 Sin250° + 6Sin60° + 12Sin330°)

= (11.7, -5.5)

Now, the direction of t+ u+ v = arc tan(-5.5/11.7)

= 155°

Therefore, 155° is the direction.

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Answer:

335°

Step-by-step explanation:

I took the test and got it right :)

CHIJ (KATONG) PRIMARY MILESTONES WHOLE NUMBERS 1: FACTORS AND MULTIPLES (3) Alarm Clock A rings every 9 minutes. Alarm Clock B rings every 12 minutes. If both alarm clocks rang together at 2 p.m., at what time will the two alarm clocks ring together again?

Answers

Answer:

The two alarm clocks will ring together again at 2:54 p.m

To find the next time the two alarm clocks will ring together, we need to find the smallest common multiple of 9 and 12. The least common multiple of 9 and 12 is 36, which means that after 36 minutes, both alarm clocks will have completed their respective cycles and will ring together again.

Starting from 2 p.m., 36 minutes later will be 2:36 p.m. Therefore, the two alarm clocks will ring together again at 2:36 p.m.

Mean between these numbers .6149 to .6236

Answers

Using the general formula for the mean, we can see that the mean between 0.6149 and 0.6236 is 0.61925

How to find the mean between two numbers?

Suppose we have any set of N numbers:

{x₁, x₂, ..., xₙ}

The mean of these values is given by:

mean = (x₁ + x₂ + ... + xₙ)/N

In this case we want to find the mean between two numbers, 0.6149 to 0.6236

This will be:

mean = (0.6149 + 0.6236)/2 = 0.61925

We can see that the mean between 0.6149 and 0.6236 is 0.61925

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Determine whether the set of vectors is linearly independent or linearly dependent. In the case of linear dependence, write down a nontrivial linear combination of the vectors that equals the zero vector. (b) V1= |1 2 3| ,V2=|-3 0 1|, V3= |4 2 2| V4= |1 1 13|

Answers

The set of vectors is linearly dependent, and the linear combination equals the zero vector.

To determine whether a set of vectors is linearly independent or linearly dependent, we can use the following method:

1. Write the vectors as columns in a matrix.

2. Perform row reduction on the matrix to obtain an echelon form.

3. Check if the last non-zero row in the echelon form has leading entry 1, which indicates that the vectors are linearly independent.

4. If there is a row of all zeros in the echelon form, excluding the last row, then the vectors are linearly dependent, and we can find a nontrivial linear combination that equals the zero vector by looking at the non-trivial coefficients in that row.

The last non-zero row in the echelon form has leading entry 6, which is not 1, indicating that the set of vectors is linearly dependent.

To find a nontrivial linear combination that equals the zero vector, we can look at the row in the echelon form that has a non-trivial coefficient. In this case, the second row has coefficients 6 and -2, so a nontrivial linear combination that equals the zero vector is:

6 * V2 - 2 * V3 = |0 0 0|

So, the set of vectors is linearly dependent, and the above linear combination equals the zero vector.

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find an equation for each sphere that passes through the point (5, 1, 4) and is tangent to all three coordinate planes

Answers

The equation for the sphere is [tex](x-5)^2 + (y-1)^2 + (z-4)^2 = r^2[/tex] , that passes through the point (5, 1, 4) and is tangent to all three coordinate planes.

A sphere centered at the point (x0, y0, z0) with a radius of r can be represented by the equation [tex](x-x0)^2 + (y-y0)^2 + (z-z0)^2 = r^2.[/tex]

Therefore, a sphere that passes through the point (5, 1, 4) and is tangent to all three coordinate planes can be represented by substituting the values of x0, y0, and z0: [tex](x-5)^2 + (y-1)^2 + (z-4)^2 = r^2[/tex], where r is the radius of the sphere and is equal to the distance from the center of the sphere to the tangent point on the coordinate plane.

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(-4x²+ 6x + 3) + (8x + 5+ ?) = 2x² + 14x + 8

Answers

The missing value in the expression is 6x²

What is an expression?

Expressions in math are mathematical statements that have a minimum of two terms containing numbers or variables, or both, connected by an operator in between.

Given is an expression, (-4x²+ 6x + 3) + (8x + 5+ ?) = 2x² + 14x + 8 we need to find the missing value in the expression,

(-4x²+ 6x + 3) + (8x + 5+ ?) = 2x² + 14x + 8

-4x²+ 6x + 3 + 8x + 5+ ? = 2x² + 14x + 8

-4x²+14x+8+? = 2x² + 14x + 8

14x-14x+8x-8x+? = 2x² + 4x²

? = 6x²

Hence, the missing value in the expression is 6x²

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Use the disk method or the shell method to find the volume of the solid generated by revolving the region bounded by the graphs of the equations about each given line x2 (a) the x-axis (b) the y-axis (c) the line x = 5 Need Help? Read ItTalk to a Tutor +-4 points LarCalc11 7.3.030.MI. Use the disk method or the shell method to find the volume of the solid generated by revolving the region bounded by the graphs of the equations about each given line 10 x2 (a) the x-axis (b) the y-axis (c) the line y 10

Answers

Using either shell method, the volume of the solid generated by revolving the region bounded by y = [tex]x^{3}[/tex] and y = 0 around the lines x = 2 (a), x = 0 (b), and x = 9 (c) can be determined to be 8π, 0, and 54π, respectively.

To solve this problem using the disk method, we first need to determine the area of the region bounded by the two equations. This can be done by integrating y = [tex]x^{3}[/tex] from x = 0 to x = 2, which gives us A = 8/4 = 2. We then need to determine the radius of the disk, which is the distance from the line of rotation to the point of intersection of the two equations.

For (a), this is the distance from x = 2 to y = 2, which is 2. For (b), this is the distance from x = 0 to y = 0, which is 0. For (c), this is the distance from x = 9 to y = 27, which is 27/3. We can now use the formula for the volume of a solid generated by revolving a region around a line to calculate the volume for each of the three lines:

(a) V = π(2)2 × 2 = 8π

(b) V = π(0)2 × 2 = 0

To solve this problem using the shell method, we first need to determine the limits of integration, which is the same as for the disk method. We then need to determine the radius of the shell, which is the distance from the line of rotation to the point of intersection of the two equations.

This is the same as for the disk method. We can now use the formula for the volume of a solid generated by revolving a region around a line to calculate the volume for each of the three lines:

(a) V = 2π ∫(2) ([tex]x^{3}[/tex]) dx = 8π

(b) V = 2π ∫(0) ([tex]x^{3}[/tex]) dx = 0

The disk and shell methods are two methods used to find the volume of a solid generated by revolving a region bounded by the graphs of two equations around a given line.

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Which graph shows the solution to the equation below?

log Subscript 3 Baseline (x + 2) = 1
On a coordinate plane, a curve starts in quadrant 3 and curves up into quadrant 1 and approaches y = 3. It crosses the x-axis at (1, 0). A horizontal straight line is at y = 1.
On a coordinate plane, a curves starts in quadrant 4 and curves up into quadrant 1 and approaches y = 3. It crosses the x-axis at (1, 0). A horizontal straight line is at y = negative 1.
On a coordinate plane, a curve starts in quadrant 3 and curves up into quadrant 1 and approaches y = 1. It crosses the x-axis at (negative 1, 0). A horizontal straight line is at y = 1.
On a coordinate plane, a curves starts in quadrant 3 and curves up into quadrant 1 and approaches y = 2. It crosses the x-axis at (negative 1, 0). A horizontal straight line is at y = negative 1.

Answers

The solution x = 1 of the equation log Subscript 3 Baseline (x + 2) = 1 is shown in figure.

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

We have to given that;

The expression is,

⇒ log₃ (x + 2) = 1

Now, We can draw the graph of expression log₃ (x + 2) = 1.

Here, The expression is,

⇒ log₃ (x + 2) = 1

⇒ x + 2 = 3¹

⇒ x + 2 = 3

⇒ x = 3 - 2

⇒ x = 1

Thus, The solution x = 1 is shown in figure.

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Answer:

y = log x + 3

Step-by-step explanation:

The answer above is incorrect.

Find the mean, median, and mode of the set. Round to the tenths place, if needed: 3.1, 4.5, 4.3, 4.5, 8.0, 3.2

Answers

The mean, median and the mode of the given sets of data above would be = 3.3, 4.3, and 4.5 respectively.

What is a mode?

A mode is the value in a data set that appeared the most when compared with others.

The mode of this data set = 4.5. This is because it appeared twice.

The median of the data set is the value that is at the middle after being arranged.

The median of the data set = 3.1,3.2,4.3,4.5,4.5 = 4.3

The mean of the data set = 3.1+3.2+4.3+4.5+4.5/6

= 19.6/6

= 3.3

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A cubic root function has a domain of x≥−3 and a range of y≥−1. What is the range of its inverse?

Answers

In general, if the range of a function is y≥−1, its inverse has a domain of y≥−1. So, the range of the inverse of the cubic root function is y≥−1.

How do we know this?

The range of a cubic root function becomes the domain of a cube function and vice versa since a cubic root function is an inverse function of a cube function. Therefore, the cube function's range is x3 if the cubic root function's domain is x3.

A function's inverse typically has a domain of y1 if its range is y1. Therefore, y1 is the domain of the inverse of the cubic root function.

Describe a function.

A function is a mathematical relationship between a domain—a set of inputs—and a range—a set of outputs. Each input in the domain is given a distinct output, known as the function value, by a function. An equation or graph can be used to depict the function value.

A function is typically represented symbolically by an equation that describes the relationship between the inputs and outputs and a letter, like f or g, as well as the letter. For instance, the equation of a function that accepts a value of x as input and produces its square is f(x) = x2.

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Shannon manages a small zoo and she has been analyzing the attendance data. Shannon finds that the number of visitors increases exponentially as the temperature increases, and this situation is represented by the function f(x) = 3x. Shannon also finds a linear equation that models the number of people who leave the park early depending on the change in temperature, and it is represented by g(x) = −x + 4. The graph of the two functions is below. Find the solution to the two functions and explain what the solution represents.

Graph increasing exponentially from the left, crosses the y axis at one and goes to infinity and intersects a linear graph that decreases and crosses the y axis at four and the x axis at four.

Answers

Answer:

The solution to the two functions is (1, 3) and it represents the temperature at which the number of people visiting the zoo equals the number of people leaving the zoo.

colette is putting a mat of width 4w and a frame of width w around a 16-inch by 48-inch poster. find an expression for the perimeter of frame

Answers

The expression for the perimeter of the frame is 128 inches + 10w.

Width of the mat = 4w

width of the frame = w

Now,

Let the length of the poster be = L

Let the width of the poster = W.

Therefore, According to the question,

L = 48 inches and W = 16 inches.

The total width of the mat and frame around the poster will be -

= 4w + w

= 5w.

Calculating the perimeter of the frame -

= 2 (L + W + 5w),

= 2 (48 + 16 + 5w)

= 2 (64 + 5w)

= 128 + 10w.

Answers

Elementary row operations to find system of equation solutions in row echelon or reduced row echelon form.

We first write the augmented matrix [A|B] by combining the coefficients of the variables and the constants on the right side of the equations:

x + y + 6z | 8

1/3 x - 1/3 y + 2/3 z | 2

1/2 x | -z | 0.

Here are the steps to perform Gauss-Jordan row reduction on the augmented matrix [A|B]:

Step 1: Divide the first row by x + y + 6z to get 1 as the leading coefficient: