Domain: the domain or set of departure of a function is the set into which all of the input of the function is constrained to fall. It is the set X in the notation f: X → Y, and is alternatively denoted as . Since a (total) function is defined on its entire domain, its domain coincides with its domain of definition.
Vertical Line test: the vertical line test is a visual way to determine if a curve is a graph of a function or not. A function can only have one output, y, for each unique input, x. If a vertical line intersects a curve on an xy-plane more than once then for one value of x the curve has more than one value of y, and so, the curve does not represent a function. If all vertical lines intersect a curve at most once, then the curve represents a function.
Relation: Relations are used to describe a connection between the elements of two sets. They help to map the elements of one set (known as the domain) to elements of another set (called the range) such that the resulting ordered pairs are of the form (input, output).
Practical Range: range is a statistical measurement of dispersion, or how much a given data set is stretched out from smallest to largest. In a set of data, the range is the difference between the greatest and smallest value.
Function: Function is an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).
Practical Domain: The domain is the set of all possible x-values which will make the function "work" and will output real y-values.
function Notation: Function notation is a way of expressing a relationship between two variables. A function is most often denoted by letters such as f, g, and h, and the value of a function f at an element x of its domain is denoted by f(x). In function notation, f(x) represents the output of the function f for a given input x. The letter 'f' is commonly used to represent a function, but other lower case letters such as 'g' or 'h' can also be used. The function notation formula is f(x) = y, where y is the output of the function for a given input x. The set of all pairs (x, f(x)) is called the graph of the function.
a group of 11 women and 16 men must select a 6-person committee. how many committees are possible if it must consist of 5 men?
To answer your question, we need to use a combination formula, which is nCr = n! / (r! * (n-r)!).
In this case, we want to select 5 men out of 16 men, which can be done in 16C5 = 4368 ways. Then, we need to select 1 woman out of 11 women, which can be done in 11C1 = 11 ways. Therefore, the total number of committees possible if it must consist of 5 men is 4368 * 11 = 48,048.
In summary, there are 48,048 committees possible consisting of 5 men and 1 woman, out of a total of 11 women and 16 men. Finally, to find the total number of possible committees, multiply the number of ways to select the men by the number of ways to select the women: C(16, 5) * C(11, 1). This results in 4368 possible committees that consist of 5 men and 1 woman.
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a study was conducted by the director of parking and transportation at a large university. one variable under study is the number of days in a week the student comes to campus. which type of variable is this?
This variable is a discrete variable as it can only take on three distinct values (0, 1, or more than 1) depending on how many days a student comes to campus in a week.
In other words, it is a categorical variable with three categories. This answer can be explained in a paragraph that discusses the definition of discrete variables and how they apply to the given scenario. The variable in this study, which is the number of days in a week a student comes to campus, is an example of a discrete variable. Discrete variables are variables that have a finite or countable number of possible values, often represented by integers. In this case, the number of days can only be whole numbers ranging from 0 to 7.
To summarize, the number of days a student comes to campus is a discrete variable because it can only take on a countable number of values in the form of whole numbers. This is an important distinction to make when conducting studies or analyzing data, as different statistical methods apply to discrete and continuous variables.
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find the general solution of the given differential equation. y' + 5x4y = x4
[tex]y = (1/5) x^5 + Ce^ {(-x^5)}[/tex] is the general solution of the given differential equation.
The given differential equation is:
y' + 5x⁴ y = x⁴
To solve this equation, we can use an integrating factor. First, we need to multiply both sides of the equation by the integrating factor, which is [tex]e^{(int 5x^4 dx)}[/tex]:
[tex]e^{(int 5x^4 dx) }y' + 5x^{4} e^{(int 5x^4 dx)} y = x^4 e^{(int 5x^4 dx)}[/tex]
The integral of 5x⁴ is (5/5)x⁵ = x, so the integrating factor is [tex]e^{(x^5)}[/tex]:
[tex]e^{(x^5)} y' + 5x^{4} e^{(x^5)} y = x e^(x^5)[/tex]
Now we can recognize the left-hand side as the product of the derivative of the product of [tex]e^{(x^5)[/tex]and y:
[tex](d/dx)[e^{(x^5)} y] = x^4 e^{(x^5)}[/tex]
Integrating both sides with respect to x, we get:
[tex]e^{(x^5)} y = (1/5) x^5 e^{(x^5)} + C[/tex]
where C is the constant of integration. Dividing both sides by [tex]e^{(x^5)}[/tex], we get the general solution:
[tex]y = (1/5) x^5 + Ce^(-x^5)[/tex]
where C is an arbitrary constant.
[tex]y = (1/5) x^5 + Ce^{(-x^5)}[/tex] is the general solution of the given differential equation.
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A cylinder has a surface area of approximately 256.224 m². If the diameter of the cylinder's base is 8 m, what is the height of the cylinder?
Round to the nearest tenth.
The height of the cylinder is approximately 7.94 meters when rounded to the nearest tenth.
How did this do?
The surface area of a cylinder can be calculated using the formula:
SA = 2πr^2 + 2πrh
where r is the radius of the base and h is the height of the cylinder.
We are given the diameter of the cylinder's base, which is 8 m. The radius is half the diameter, so:
r = 8 m / 2 = 4 m
Substituting this value for r, and the given value for SA into the formula, we get:
256.224 m² = 2π(4 m)^2 + 2π(4 m)h
Simplifying this equation:
256.224 m² = 32π + 8πh
256.224 m² - 32π = 8πh
h = (256.224 m² - 32π) / (8π)
h ≈ 7.94 m (rounded to the nearest tenth)
The ratio of the number of strawberries to the numbers to the number of kiwis is 5:4. The ratio of the number of kiwis to the number of plums is 3:2. There are 56 plums. How many strawberries are there?
There are 3x = 3(28) = 84 kiwis.next, we are told that the ratio of strawberries to kiwis is 5:4.
let's start by using the second piece of information to find the number of kiwis. if the ratio of kiwis to plums is 3:2, then we can represent the number of kiwis as 3x and the number of plums as 2x. we are told that there are 56 plums, so we can solve for x:
2x = 56x = 28 let's represent the number of strawberries as 5y and the number of kiwis as 4y. we already know that there are 84 kiwis, so we can solve for y:
4y = 84
y = 21
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Question in photo will make BRAINLIEST
The required equation is VW/UW = YW/XW for the given similar triangles.
The figure is given as shown.
As per the question, given that triangles ΔUVW and ΔXYW are similar.
As we know that similar triangles are defined as two triangles with the same shape, equal pair of corresponding angles, and the same ratio of the corresponding sides.
Therefore, we can be written as follows:
VW/UW = YW/XW
This signifies that the corresponding angles and sides of the two triangles are equal and proportionate.
Therefore, the required equation is VW/UW = YW/XW.
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Which graph best represents the solution set for this system of inequalities? y < − 1 /2 x − 1
Step-by-step explanation:0
The slope is 1/2, and the y-intercept is (0,-1).
The area shaded is what x could be
What is the area, in square centimeters, of the trapezoid below?
13.9 cm
18 cm
7 cm
9.3 cm
Answer:
120.8
Step-by-step explanation:
The Gateway Arch in St. Louis was designed by Eero Saarinen and was constructed using the equation y=211.49-20.96 cosh 0.03291765x for the central curve of the arch, where x and y are measured in meters and |x| ≤ 91.20. At what points is the height 100 m?
To find the points where the height of the Gateway Arch is 100 meters, we need to solve the equation y = 100 for x.
Substituting y = 100 into the equation for the central curve of the arch, we get:
100 = 211.49 - 20.96 cosh (0.03291765x)
Rearranging the equation, we get:
cosh (0.03291765x) = (211.49 - 100) / 20.96
cosh (0.03291765x) = 5.21
Taking the inverse hyperbolic cosine of both sides, we get:
0.03291765x = acosh(5.21)
x = (1/0.03291765) acosh(5.21)
Solving for x using a calculator, we get:
x = ± 64.975
Therefore, the height of the Gateway Arch is 100 meters at the points (64.975, 100) and (-64.975, 100).
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A chore of a circle is l cm long the distance of the circle is h in cm and the radius of the circle is r cm express r in terms of l and b
To express the radius of a circle, denoted by r, in terms of the length of the chord (l) and the distance of the chord from the center of the circle (h), we can use the following approach:
In a circle, the perpendicular distance from the center to a chord bisects the chord. This means that the distance from the center to the midpoint of the chord is equal to h/2. Now, consider the right triangle formed by the radius (r), the distance from the center to the midpoint of the chord (h/2), and half of the chord length (l/2). According to the Pythagorean theorem, the square of the radius is equal to the sum of the squares of the other two sides of the triangle.
Using this information, we can write the equation:
r^2 = (h/2)^2 + (l/2)^2
Simplifying the equation:
r^2 = h^2/4 + l^2/4
Taking the square root of both sides to solve for r:
r = √(h^2/4 + l^2/4)
Therefore, the expression for the radius (r) in terms of the length of the chord (l) and the distance of the chord from the center (h) is r = √(h^2/4 + l^2/4).
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which equation can be used to determine the reference angle, r, if θ = 7π/12?
a. r = θ
b. r = π - θ
c. r = θ - π
d. r = 2π - θ
The equation that can be used to determine the reference angle, r, if θ = 7π/12 is option (b) r = π - θ.
A reference angle is the acute angle formed by the terminal side of an angle and the x-axis. To find the reference angle, we need to subtract the angle from either π/2 or π (depending on which quadrant the angle is in).
In this case, 7π/12 is in the second quadrant (between π/2 and π). Therefore, we subtract 7π/12 from π to get the reference angle:
r = π - θ
r = π - 7π/12
r = (12π/12) - (7π/12)
r = 5π/12
So the reference angle, r, for θ = 7π/12 is 5π/12.
Note that option (a) r = θ is incorrect because this would give the same angle as θ, not the reference angle. Option (c) r = θ - π is incorrect because it would give a negative angle, which is not an acute angle. Option (d) r = 2π - θ is incorrect because it would give an angle in the fourth quadrant, which is not the reference angle for an angle in the second quadrant.
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It’s proportions
Need help with the first four
Answer:
1: $85
2: $3.10
3: $9.75
4: $3.78
Step-by-step explanation:
1: 2 tickets = $34
1 ticket = $17 (34 divided by 2)
17 x 5 = $85
2: 3 can = $.93
0.93 / 3 = $0.31
0.31 x 10 = $3.10
3: 3 copies = $5.85
5.85 / 3 = $1.95
$1.95 x 5 = $9.75
4: 4 containers = $2.52
2.52 / 4 = $0.63
0.63 x 6 = $3.78
y=|1/2x-2|+3
one unit to the right
please help
The Transformation of the original equation y=|1/2x-2|+3 one unit to the right results in the new equation y=|1/2(x-1)-2|+3
To shift the graph of the equation y=|1/2x-2|+3 one unit to the right, we can use a transformation of the form y=|1/2(x-1)-2|+3. This transformation will shift the graph one unit to the right by replacing x with (x-1) in the original equation.
To graph the transformed equation, we can start by finding the x- and y-intercepts. To find the y-intercept, we set x=0:
y=|1/2(0-1)-2|+3
y=|1/2(-1)-2|+3
y=|-1/2-2|+3
y=|-5/2|+3
y=5/2+3
y=11/2
Therefore, the y-intercept is (0, 11/2).
To find the x-intercept, we set y=0:
0=|1/2(x-1)-2|+3
-3=|1/2(x-1)-2|
-3=1/2(x-1)-2 or -3=-1/2(x-1)-2
-1=1/2(x-1) or -1=-1/2(x-1)
-2=x-1 or 0=x-1
x=-1 or x=1
Therefore, the x-intercepts are (-1, 0) and (1, 0).
Next, we can plot these points and draw the graph. The graph is symmetric about the vertical line x=1, as the absolute value function has this property.
Overall, the transformation of the original equation y=|1/2x-2|+3 one unit to the right results in the new equation y=|1/2(x-1)-2|+3.
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20812
PART B
Meg's mean time for completing homework is 24 minutes with a MAD of
64 minutes. Jason's mean time for completing homework is 26 minutes with a
MAD of 44 minutes. Which student, Meg or Jason, has more consistent times
completing their math homework? Explain your reasoning,
The estimated mean of the time for completion of race is 220 minutes where as the MAD to the mean ratio is 22.272%.
We have,
In statistics, the mean is one of the measures of central tendency. Another two are median and mode. Mean is the average of the given set of data.
You interviewed a random sample of 25 marathon runners and compiled the following statistics.
Mean time to complete the race = 220 minutes and MAD = 50 minutes.
So from given data it can be concluded that
mean = 220 MAD= 50
Now we find ,
(MAD/Mean ) × 100%
= (50/220)× 100%
= (5×100)/22 %
≈ 22.272%
Hence , the estimated mean of the time for completion of race is 220 minutes where as the MAD to the mean ratio is 22.272%.
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complete question:
You interviewed a random sample of 25 marathon runners and compiled the following statistics.
Mean time to complete the race = 220 minutes and MAD = 50 minutes
What can you infer about the time to complete the race among the population of runners represented by your sample?
Find the value of a and b when x = 10
a = 5x*/2
b = 2x*(x – 5)/10x
When x = 10, b takes the value 1. The values of a and b when x = 10 are a = 25 and b = 1.
To find the values of a and b when x = 10, we can substitute x = 10 into the given expressions for a and b and simplify the equations.
a = 5x/2
Replacing x with 10:
a = 5(10)/2
a = 50/2
a = 25
So, when x = 10, a takes the value 25.
b = 2x*(x - 5)/10x
Replacing x with 10:
b = 2(10)(10 - 5)/(1010)
b = 2(10)(5)/(100)
b = 205/100
b = 100/100
b = 1.
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Two cats started to run at the same time from the same point in the same direction, but one was running twice as fast as the other. 50 minutes later, the cats were 750 meters apart. Find the speed of each cat.
Step-by-step explanation:
One is twice as fast as the other speeds are 2 x and x
rate * time = distance
(2x -x) * 50 = 750 x = 15 m/min 2x = 30 m/min
can you help me with mathhh
Bookwork code: M56
Calculator
not allowed
Select all of the options which are true of the perpendicular bisector of
line AB.
It is a fixed distance from line AB
It meets line AB at 90°
It meets line AB at 180°
It passes through A
It passes through B
It does not meet line AB
It passes through the midpoint of line AB
Answer: It meets at 90, and it passes through the midpoint.
Step-by-step explanation:
It isn't the first option because there is no distance between the line and it's bisector
It meets at AB because at a 90 degree angle because it perpendicular
Because of that, it can't also meet at a 180 degree angle
because its a bisector, it would not pass through A or B
It must meet line AB to bisect it
And because it bisects the line, it would also pass through the midpoint.
How many ounces of gatoradae would marcus drank if he walked 12 miles
The amount of Gatorade that Marcus would drink while walking 12 miles depends on several factors such as his personal preference, level of exertion, and the weather conditions.
However, a general rule of thumb is to drink about 8 ounces of fluid (water or sports drink) for every 20 minutes of exercise. If we assume that Marcus takes about 2 hours to walk 12 miles, he would be walking for 120 minutes, and he would need to drink about 48 ounces (8 ounces x 6 cycles of 20 minutes) of fluid during his walk. Therefore, Marcus would drink about 48 ounces of Gatorade (or any other fluid) during his 12-mile walk.
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A survey was given to a random sample of 800 voters in the United States to ask
about their preference for a presidential candidate. Of those surveyed, 41% of the
people said they preferred Candidate A. At the 95% confidence level, what is the
margin of error for this survey expressed as a percentage to the nearest tenth? (Do
not write ).
The margin of error for the survey is approximately 3.4% .
To calculate the margin of error for this survey at the 95% confidence level, we'll need to use the following formula:
Margin of Error = Z-score * √(p * (1-p) / n)
Where:
- Z-score represents the confidence level (1.96 for 95% confidence)
- p is the proportion of people who preferred Candidate A (0.41 or 41%)
- n is the sample size (800 voters)
Margin of Error = 1.96 * √(0.41 * (1-0.41) / 800)
After calculating, we get:
Margin of Error ≈ 0.0341 or 3.41%
So, the margin of error for this survey at the 95% confidence level is approximately 3.4% to the nearest tenth.
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PLSSS HELP IF YOU TURLY KNOW THISSS
1.429
This is the answer to your problem
when comparing the two means of independent samples, when are we allowed to pool the variances? question 19 options: when the population variances are known when the population variances are unknown, but assumed equal when the population variances are unknown, but assumed unequal
When comparing the two means of independent samples, we are allowed to pool the variances when the population variances are unknown, but assumed equal.
Pooling the variances is a statistical technique used when comparing means from independent samples. It involves combining the sample variances from both groups to estimate a common variance. This assumption of equal variances allows for a more accurate estimation of the standard error in the case of equal population variances.
When the population variances are unknown, we can conduct a statistical test, such as the t-test, assuming equal variances. This test uses the pooled variance estimate to calculate the standard error and determine the statistical significance of the mean difference between the two groups.
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PLEASE HELP ME I NEED HELP
A makeup artist purchased some lipsticks and wants to wrap them individually with gift wrap. Each lipstick has a radius of 0.6 inch and a height of 2.4 inches. How many total square inches of gift wrap will the makeup artist need to wrap 5 lipsticks? Leave the answer in terms of π.
18π square inches
14.4π square inches
11.3π square inches
2.26π square inches
Answer:
I think that it is 18π sq in
Step-by-step explanation:
U do surface area of a cylinder
SA=2πrh+2πr^2
john drives his car a distance of 16 miles to work, at a rate of m miles per hour. if, on a certain day, the car stops after only v miles, how many hours will it take john to travel the rest of the way, at the same rate?
Answer:
time left = (16 - v) / m----------------------------
Use the formula:
distance = rate x time.We know that John drives a distance of 16 miles to work at a rate of m miles per hour.
So, the time it takes him to travel the full distance is:
time = distance / rate time = 16 / mOn a certain day, the car stops after only v miles. So, the distance John still needs to travel is:
distance left = 16 - vWe also know that he will be traveling at the same rate, so we can use the formula again:
distance left = rate x time left 16 - v = m x time leftTo find the time left, we can rearrange the formula:
time left = (16 - v) / molve the system of differential equations the lesser of the two eigenvalues is its corresponding eigenvector is . what is ? the greater of the two eigenvalues is its corresponding eigenvector is . what is ?
The solution to the system of differential equations is x(t) = -29[tex]e^{-0.2t}[/tex] + 18[tex]e^{0.1t}[/tex] and y(t) = -9[tex]e^{-0.2t}[/tex] + 5[tex]e^{0.1t}[/tex] with initial conditions x(0)=-7 and y(0)=-2. The eigenvalues and eigenvectors are also given.
We can solve the system of differential equations using the eigenvalues and eigenvectors as follows
Let V be the matrix whose columns are the eigenvectors of the system
V = [ -7 4 ]
[ -2 1 ]
Then the diagonal matrix D whose diagonal entries are the eigenvalues of the system is
D = [ -0.2 0 ]
[ 0 0.1 ]
We can express the solution of the system as
[ x(t) ] [ -7 4 ] [ [tex]e^{-0.2t}[/tex] 0 ] [ x(0) ]
[ y(t) ] = [ -2 1 ] * [ 0 [tex]e^{0.1t}[/tex]] * [ y(0) ]
Substituting the given initial conditions, we get:
[ x(t) ] [ -7 4 ] [ [tex]e^{-0.2t}[/tex] 0 ] [ -7 ]
[ y(t) ] = [ -2 1 ] * [ 0[tex]e^{0.1t}[/tex] ] * [ -2 ]
Simplifying, we get
x(t) = (-7[tex]e^{-0.2t}[/tex] + 4[tex]e^{0.1t}[/tex](-7) + (-2[tex]e^{-0.2t}[/tex] + [tex]e^{0.1t}[/tex](-2)
= -29[tex]e^{-0.2t}[/tex] + 18[tex]e^{0.1t}[/tex]
y(t) = (-7[tex]e^{-0.2t}[/tex] + 4[tex]e^{0.1t}[/tex](-2) + (-2[tex]e^{-0.2t}[/tex] + [tex]e^{0.1t}[/tex](1)
= -9[tex]e^{-0.2t}[/tex] + 5[tex]e^{0.1t}[/tex]
Therefore, the solution to the system of differential equations with the given initial conditions is
x(t) = -29[tex]e^{-0.2t}[/tex] + 18[tex]e^{0.1t}[/tex]
y(t) = -9[tex]e^{-0.2t}[/tex] + 5[tex]e^{0.1t}[/tex]
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--The given question is incomplete, the complete question is given below " Solve the system of differential equations { x'=2.2x−8.4y, y' =0.6x−2.3y}
with the initial condition x(0)=−7,y(0)=−2 The eigenvalues and their eigenvectors are found as follows. The lesser of the two eigenvalues is −0.2 and its corresponding eigevector is [ −7 −2]. The greater of the two eigenvalues is 0.1 and its corresponding eigevector is [ 4 1]. "--
Pls help due today xxx
Answer:
x=6
Step-by-step explanation:
25^3=15,625
5^6=15,625
Therefore, x=6
Answer:
x=6.........................................................
a trailer is to be filled with bricks. which measure will help find the number of bricks the trailer will hold?
To find the number of bricks that a trailer will hold, we need to measure the capacity of the trailer. The most useful measure for this purpose would be volume, which is typically measured in cubic feet or cubic meters.
We would need to know the length, width, and height of the trailer in order to calculate its volume. Once we have that information, we can calculate the total number of cubic feet or cubic meters that the trailer can hold. We can then divide that number by the volume of a single brick to determine the maximum number of bricks that the trailer can hold. It's important to note that we also need to account for any empty space or gaps between the bricks in our calculation, since these will affect the total number of bricks that can be loaded into the trailer.
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.role perception indicates our view of how we are supposed to act in a given situation. TRUE OR FALSE?
True. Role perception refers to an individual's perception of what their role or position entails and how they are expected to behave in a particular situation.
It is shaped by various factors such as the individual's personal values, beliefs, experiences, and cultural background, as well as the expectations and norms of the organization or group they belong to.
Role perception can influence an individual's behavior, performance, and job satisfaction, as it guides them on how to act and what to expect from others in their role. However, role perception may not always be accurate or aligned with the actual expectations of the role, which can lead to misunderstandings and conflicts.
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HELP PLEASE ASAP, will give BRAINLIEST to correct answer!
The statements about the given parabola that are true are:
A. The focus is ( - 2 , 1 / 2).B. The vertex is (- 2 , 4 ).C. The directrix is y = 15 / 2.The form of a parabola is :
y = a ( x - h ) ² + k
This means that the statement that the vertex is (-2, 4) is true because the vertex is ( h, k ).
The focus is ( h, k - p ) which would be ( -2 , 1 / 2 ). This is shown in option A.
The Directrix is:
y = 4 + 7/2
= 15 / 2
This is shown in option C.
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Which inequality is true when the value of x is -15?
x-6> -1
-x-6 < 1
x-6 < −1
-x-6>-1
Submit Answer
The correct inequality which is true when the value of x is -15 is,
⇒ x - 6 < - 1
⇒ - x - 6 > - 1
We have to given that;
To find inequality which is true when the value of x is -15.
Hence, Substitute x = - 15 in the inequality and find correct inequality as;
⇒ x - 6 > - 1
⇒ - 15 - 6 > - 1
⇒ - 21 > - 1
Which is not true.
⇒ - x - 6 < 1
⇒ - (- 15) - 6 < 1
⇒ 15 - 6 < 1
⇒ 9 < 1
Which is not true.
⇒ x - 6 < - 1
⇒ - 15 - 6 < - 1
⇒ - 12 < - 1
Which is true.
⇒ - x - 6 > - 1
⇒ - (- 15) - 6 > - 1
⇒ 15 - 6 > - 1
⇒ 9 > - 1
Which is true.
Thus, The correct inequality which is true when the value of x is -15 is,
⇒ x - 6 < - 1
⇒ - x - 6 > - 1
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