Answer:
Step-by-step explanation:
Hello! Here are the steps to solve 4x - 8 = 3x + 13
4x - 8 = 3x + 13
+ 8 + 8
____________
4x = 3x + 21
-3x -3x
____________
x = 21
There is one solution because there is only one possibility for x. Let's check the answer.
4(21) - 8 = 3(21) + 13
84 - 8 = 63 + 13
76 = 76
x = 21, x does equal 21 and the answer that there is only one solution is correct.
No solutions would mean that after you solved the equation, you would get something like 9 = 7, 2 = 5, etc. which is not true. No solutions would mean that you would receive a false equation.
Infinite solutions would mean that after you solved an equation, such as 2x = 2y, you would get x = y. There are infinite solutions for this because you can substitute infinite numbers in for x and y. 1 = 1, 2 = 2, 3 = 3, 4 = 4, 5 = 5, etc.
It costs $4 per ride at an amusement park, plus a $10 fee to get in. Write an equation to represent the total cost (y) for any number of rides (x).
An equation to represent the total cost (y) for any number of rides (x) is y = 4x + 10.
How to write an equation to represent the total cost (y)?In order to write an equation that model this situation, we would assign variables to the number of rides at an amusement park and the total cost respectively, and then translate the word problem into algebraic equation as follows:
Let the variable x represent the number of rides.Let the variable y represent the total cost.Next, we would translate the word problem into an algebraic equation based on the fact that it cost $4 per ride, plus a $10 fee to get in as follows;
y = 4x + 10.
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Dr johnson is a clinical physiologist looking to test out a new therepy to help people that are scared of spiders he measured each person fear of spiders before the therapy and after the therapy in both colums of data he used the pulse rate of people when confronted by an actual spiders
Answer: Dr. Johnson is conducting an experimental study to test the effectiveness of a new therapy for individuals with arachnophobia, which is the fear of spiders. He is measuring the pulse rate of the participants before and after the therapy as an indicator of their fear response when confronted by an actual spider. The data collected will likely be used to determine if the therapy is effective in reducing the participants' fear of spiders as measured by their pulse rate.
It is important to note that while pulse rate is a good indicator of fear response, it is not the only indicator of fear and it is also not a definitive measure of the effectiveness of the therapy. Other factors such as self-reported fear, behavioral changes, and physiological changes should also be considered to get a comprehensive understanding of the therapy's effectiveness.
Step-by-step explanation:
When x is -1.5, what value of y makes the equation true?
The value of the equation at x = 1, x = -1.5, and x = 8.5 will be 0.5, 7, and -20, respectively.
What is a linear equation?A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.
The linear equation is given as,
y = mx + c
Where m is the slope of the line and c is the y-intercept of the line.
The equation is given below.
y = - 3x + 2.5
The value of the equation at x = 1 will be given as,
y = - 3 × (1) + 2.5
y = - 3 + 2.5
y = - 0.5
The value of the equation at x = - 1.5 will be given as,
y = - 3 × (-1.5) + 2.5
y = 4.5 + 2.5
y = 7
The value of the equation at x = 8.5 will be given as,
y = - 3 × (8.5) + 2.5
y = - 22.5+ 2.5
y = - 20
The value of the equation at x = 1, x = -1.5, and x = 8.5 will be 0.5, 7, and -20, respectively.
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Complete question:
-9x + 1 = -9x+1 is it no solution one solution or infinite solutions
Answer: Infinite Solutions
Step-by-step explanation:
When an equation is the exact same as the other, they have an infinite amount of solutions.
I hope I helped :D
Answer: This equation has infinite solutions.
Step-by-step explanation: There are all real numbers on both sides of the equation. I hope this helps!
2. A manufacturer of flashlights wants to know how well one of their newer styles is selling in a chain of large home-improvement stores. They select a simple random sample of 20 stores, record how many of the flashlights were sold in a 30-day period, and construct a 95% confidence interval for the mean number of flashlights sold.
(a) If, instead of constructing a 95% confidence interval, the flashlight manufacturer constructed a 98% confidence interval, would the 98% interval be wider, narrower, or the same width as the 95% interval? Explain.
(b) How would the width of confidence interval change if the flashlight manufacturer took a larger sample? Explain.
(c) The 20 stores in the sample were actually the only stores who provided sales figures from 36 stores that were randomly chosen to be in the sample. Can the manufacturer adjust the confidence interval to take this nonresponse into account? If so, how? If not, why not?
A: (a) The 98% confidence interval would be wider than the 95% interval. As the confidence level increases, the margin of error increases, thus making the interval wider.
(b) The width of the confidence interval would decrease as the sample size increases. This is because a larger sample size will result in a more accurate representation of the population, thus allowing for a narrower confidence interval.
(c) The manufacturer cannot adjust the confidence interval to take this nonresponse into account, as the nonresponse does not affect the accuracy of the sample. The confidence interval is based on the sample itself and not the population from which it was drawn.
What is mean by random sample?Random sampling is a method of selecting a sample of individuals from a population such that each member of the population has an equal chance of being selected.
Random sampling is often used in research studies to ensure that the sample is representative of the population as a whole.
Random sampling is also used to minimize bias and ensure that the sample is not influenced by any particular group or individual.
Random sampling is important because it helps ensure that the results of the study are accurate and valid.
Random sampling helps to ensure that the sample is representative of the population and that the results are not influenced by any particular group or individual.
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All 3 are really confusing me and I need help
If the denominator is having a poor integer, then we can multiply the numerator and denominator each through -1, to carry the minus signal at the top.
What is supposed through integer ?
The variety 0 (0), a tremendous natural variety (1, 2, three, and so on.), or a terrible integer denoted by way of a minus sign (1, 2, 3, and many others.) are all examples of integers.
The inverse components of the equal superb numbers are the bad numbers.
the lowest organization and ring of the natural numbers are fashioned by using the integers.
to distinguish them from the more common algebraic integers, the integers in algebraic quantity theory are every so often particular as rational integers.
In truth, (rational) integers are rational numbers which are also algebraic integers.
inside the beyond, the word was used to refer to a a couple of of 1 or the whole aspect of a blended quantity.
we will multiply and divide -five with the aid of (-1), to get;
(-five)*(-1) = five
as a result, five is a effective rational range.
1 can be expressed inside the form of ratio, such that,
1 = 1*1
wherein each numerator and denominator, i.e. 1 and 1 are high-quality integers.
therefore, 1 is a high quality rational wide variety.
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What is the area of a rectangle with a length of 14.4 inches and a width that is one-third of the length?
A .43.2 in.2
B .51.84 in.2
C .69.12 in.2
D .103.68 in.2
Answer:
C.
Step-by-step explanation:
The area of a rectangle is typically written as:
[tex]A = l x w[/tex]
where: l represents the length and w represents the width.
Since, in the given problem, we already know the value of the length which is 14.4 inches, and the value of width is one-third of the length. Thus, the width would be:
[tex]= (14.4)(\frac{1}{3})\\= \frac{24}{5} \\= 4.8 inches[/tex]
We will simply substitute this value to the formula to get the area.
[tex]A = lxw\\A = (14.4)(4.8)\\A = 69.12 in^{2}[/tex]
Answer:
its c i did this test
Step-by-step explanation:
Can someone help me with this asap?!
Inequality of 4x-6= 22 is x=7
Explain about the Inequality?In mathematics, inequalities describe the connection between two values that are not equal. Equal implies to be equal, not. The "not equal symbol is typically used to indicate that two values are not equal. But different inequalities are used to compare the values to determine if they are less than or higher than.
Both equations and inequalities are mathematical phrases created by connecting two expressions. The equal sign (=) in an equation denotes that the two expressions are regarded as equal. In contrast, an inequality indicates that the two phrases are not always equal by using the symbols >,,, or.
To the other side, move -6.
Changes from a -6 to a +6 sign.
4x-6+6= 22+6
4x= 22+6
4x= 28
Divide each side by 4
4x/4= 28/4
x= 7
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parallelogram cdef with vertices c(-4, -4), d(-2, 0), e(6, 1), and f(4, -3) in the line y = 2
The coordinates of the image of the parallelogram are:
C = (-4, 8)
D = (-2, 4)
E = (6, 3)
F = (4, 7)
What is a reflection?There are two ways of reflection.
Along x-axis:
(x, y) – (x, -y)
Along y-axis:
(x, y) - (-x, y)
We have,
Parallelogram CDEF with vertices:
C = (-4, -4)
D = (-2, 0)
E = (6, 1)
F = (4, -3)
The parallelogram is reflected over the line y = 2.
This means,
The y-coordinates will change and the x-coordinate will remain the same.
Now,
C = (-4, -4)
There are 6 units between y = 2 and y = -4 so,
C' = (-4, 2 + 6) = (-4, 8)
D = (-2, 0)
There are 2 units between y = 2 and y = 0 so,
D' = (-2, 2 + 2) = (-2, 4)
E = (6, 1)
There are 1 units between y = 2 and y = 1 so,
E' = (6, 2 + 1) = (6, 3)
F = (4, -3)
There are 5 units between y = 2 and y = -3 so,
F' = (4, 2 + 5) = (4, 7)
Thus,
The coordinates of the image are:
C = (-4, 8)
D = (-2, 4)
E = (6, 3)
F = (4, 7)
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a transformation is applied to a figure to create a new figure on a coordinate grid. which transformation does not preserve congruence?
a. A reflection across the x-axis
b. A translation 7 units down
c. A dilation by a scale factor of 5
d. A rotation of 90° clockwise
a) Factorise x²-2x-3
b) Hence, simplify 2x-1
x²²-2x-3
+
1
x-3
By eliminating the most common factors, an expression is fully factored when it is enclosed in brackets.Answer is x = 5/2, -4.
How do you factorise ?By eliminating the most common factors, an expression is fully factored when it is enclosed in brackets.Finding the highest common factor between each term in the phrase is the simplest method of factorization.
In front of any brackets, indicate the highest common factor (HCF).The Grouping method, the difference in two squares, and the sum or difference in cubes are the four primary methods of factoring. The Greatest Common Factor (GCF) is another.
2x^2 + 3x - 20
Since 2 * -20 equals -40, we require two numbers whose total is +3 and whose product is -40.
We write this as + 8 and -5.
Factor by grouping: = 2x2 + 8x - 5x - 20
= 2x(x + 4) - 5(x + 4)
= (2x - 5)(x + 4)
So, the roots are x = 5/2 and -4.
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52.8 as a fraction in simplest form
Answer:
Step-by-step explanation:
It would be 264/5 or 52^4/5
(^4 is the fourth power)
Please answer!.
.............
∠2 and ∠7 -Interior Alternate angles
∠1 and ∠3 -Corresponding angles
∠4 and ∠5 -Exterior Alternate angles
∠3 and ∠5 -Corresponding angles
What is an angle?An angle is a measure of the amount of rotation between two lines or planes. It is typically measured in degrees or radians. An angle can be formed by two rays that share a common endpoint, known as the vertex of the angle. The rays are called the sides of the angle, and the endpoint is called the vertex. Angles can be classified as acute, right, obtuse, or straight, depending on their measure.
Everyday objects contain some of the everyday examples of angles. Angles are formed by the shapes of objects like chairs, pizza, fingers, and scissors. The vertex point, a common vertex that connects the two lines that make up the angle sign, is present.
In the given figure
∠2 and ∠7 -Interior Alternate angles
∠1 and ∠3 -Corresponding angles
∠4 and ∠5 -Exterior Alternate angles
∠3 and ∠5 -Corresponding angles
Hence, the answer is:
∠2 and ∠7 -Interior Alternate angles
∠1 and ∠3 -Corresponding angles
∠4 and ∠5 -Exterior Alternate angles
∠3 and ∠5 -Corresponding angles
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Can someone please help?! Appreciated!
The value of the inequality -4(x - 6) < 22 will be x < 1/2.
How to solve the inequality?Inequalities are simply created through the connection of two expressions. In this case, it should be noted that the expressions in an inequality are not always equal. Inequalities implies that the expressions are not equal. Here, they are denoted by the symbols ≥ < > ≤.
The process of solving an inequality using the Distributive Property is similar to solving an equation using the Distributive Property. Both involve simplifying expressions by distributing terms to isolate the variable. However, the only difference is that in an inequality, you have to be careful about the direction of the inequality symbol and make sure to reverse it if you multiply or divide both sides by a negative value.
The value of the inequality will be:
-4(x - 6) < 22
-4x + 24 < 22
Collect the like terms
-4x < 22 - 24
-4x < -2
Divide
x < -2/-4
x < 1/2
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What is the value of P(X=3 or X=0)?
Enter your answer in the box.
P(X=3 or X=0) = __________
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Determine the solutions of the equation. What solution makes sense for the situation?
x =
What are the dimensions of the rectangle?
width =inches
length =inches
The dimensions of the rectangle are 8 inches as width and 13 inches as length.
How to calculate the equation?An equation simply has to do with the statement that illustrates the variables given. In this case, it is vital to note that two or more components are considered in order to be able to describe the scenario.
The equation is given as:
x² + 5x - 104.
x² + 13x - 8x - 104
x(x + 13) - 8 (x + 13).
x - 8 = 0
x = 0 + 8
Width = 8
Length = x + 5
= 8 + 5.
= 13
The width is 8 inches and length is 13 inches.
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Determine the solutions of the equation. What solution
makes sense for the situation?
A rectangle has a length that is 5 inches greater than its
width, and its area is 104 square inches. The equation (x
+5)x = 104 represents the situation, where x represents
the width of the rectangle.
(x + 5)x = 104
x2 + 5x - 104 = 0
What are the dimensions of the rectangle?
polygon ABCDE is on a coordinate plane with point A at 2, 4 and point B at 4, 3 and point C at 3, 2 and point D at 1, 2 and point E at 0, 3 Polygon ABCDE is the first in a pattern for a high school art project. The polygon is transformed so that the image of A′ is at (−2, 4) and the image of D′ is at (−1, 2). Which transformation can be used to show that ABCDE and its image are congruent?
Answer: When a polygon is transformed so that the image of A′ is at (−2, 4) and the image of D′ is at (−1, 2), it means that the image of the polygon is congruent to the original polygon and has undergone a transformation of a horizontal reflection.
A horizontal reflection is a transformation in which the shape is reflected over the x-axis, resulting in a mirror image of the shape with the same size and orientation but reflected horizontally. In this case, the image of the polygon is congruent to the original polygon and has undergone a horizontal reflection with a horizontal translation of 3 units to the left.
The transformation can be described as a composition of the horizontal reflection over the x-axis and a translation of -3 units horizontally.
Step-by-step explanation:
a five-card hand is drawn from a standard 52-card deck all at once, so order doesn't matter. what is the probaility that the hand consists entirely of face crads (K, Q, and J are the ones called face cards)?
can i plese receive an explanation and help
Answer:
33/108290 = 0.000305
Step-by-step explanation:
There are 52 cards in a deck.
There are 3 face cards of each of 4 suits in a deck, so there are 12 face cards in a deck.
Taking all cards at once is the same as taking one card at a time with no replacement.
First card: p(face card) = 12/52 = 3/13
Now there are 11 face cards and a total of 51 cards left.
Second card: p(face card) = 11/51
Now there are 10 face cards and a total of 50 cards left.
Third card: p(face card) = 10/50 = 1/5
Now there are 9 face cards and a total of 49 cards left.
Fourth card: p(face card) = 9/49
Now there are 8 face cards and a total of 48 cards left.
Fifth card: p(face card) = 8/48 = 1/6
Since each drawing of a card is an independent event, the overall probability of drawing 5 face cards is the product of the individual probabilities.
p(5 face cards) = 3/13 × 11/51 × 1/5 × 9/49 × 1/6
p(5 face cards) = 33/108290 = 0.000305
Two numbers are in the ratio 8cm:1m,if the smaller number is250,what is the greater number
Two numbers are in the ratio 8cm:1m, he greater number is 3,125.
What is ratio?A ratio in mathematics demonstrates how many times one number is present in another. A ratio can have any number of quantities, such as counts of people or things or measurements of length, weight, time, etc. Both numbers must be positive in most situations. An ordered pair of integers, a fraction with the first number in the numerator and the second in the denominator, or the value represented by this fraction are all examples of ratios.
Given that, Two numbers are in the ratio 8cm:1m and smaller number is 250.
let the greater number is x.
ratio = 8cm/1m
= 8cm/100cm
= 1/12.5 or 1:12.5
1/12.5 = 250/x
⇒ x = 250 * 12.5
⇒ x = 3,125
So, the greater number is 3,125.
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Match the correct angle pairs.
Matching the correct angle pair, we have;
i. Example of corresponding angles - Angle 1 and Angle 5
ii. Example of alternate interior angles - Angle 3 and Angle 6
iii. Example of alternate exterior angles - Angle 2 and Angles 7
iv. Example of Vertical angles - Angle 5 and Angle 8
Angles formed by a transversal.A transversal is a straight line which intersect two parallel lines, thus forming a series of angles with some common properties. Some of the common properties are: alternate angles, vertically opposite angles, corresponding angles, etc.
Considering the given choices in the question, matching the correct angle pairs; we have;
i. Example of corresponding angles - Angle 1 and Angle 5
ii. Example of alternate interior angles - Angle 3 and Angle 6
iii. Example of alternate exterior angles - Angle 2 and Angles 7
iv. Example of Vertical angles - Angle 5 and Angle 8
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The average high temperatures in degrees for a city are listed. 58, 61, 71, 77, 91, 100, 105, 102, 95, 82, 66, 57 If a value of 42.5° is added to the data, how does the mean change and by how much? The means stays at 80.4°. The mean stays at 77.5°. The mean increases by 2.9°. The mean decreases by 2.9°.
The mean decreases by 2.9°. Therefore, option D is the correct answer.
What is the average?In maths, the average value in a set of numbers is the middle value, calculated by dividing the total of all the values by the number of values. When we need to find the average of a set of data, we add up all the values and then divide this total by the number of values.
Given that, the average high temperatures in degrees for a city are 58, 61, 71, 77, 91, 100, 105, 102, 95, 82, 66, 57.
Here, average = Sum of all the observations/Number of observations
= (58+61+71+77+91+100+105+102+95+82+66+57)/12
= 965/12
= 80.41°
New average = 965+42.5/12+1
= 1007.5/13
= 77.5°
Difference in average =80.41-77.5
= 2.91°
Therefore, option D is the correct answer.
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in the year 2000, there were a reported 7,867 cases of whooping cough in the us, while in the year 2002, there were 9,771 cases, according to the cdc. what might be misleading about concluding from these data that more people were getting whooping cough in 2002?
The data does not take into account population increases over the two years. It is possible that there were more people in 2002, so the number of cases could have gone up without there being an actual increase in the rate of infection.
It could also be the case that better reporting and the more accurate diagnosis were responsible for the increase in numbers. The two-year period could also be too short to draw any meaningful conclusions. Diseases can have long-term cycles of increase and decrease, so it is possible that the increase in numbers was just part of a longer-term cycle that had already been in progress.
To accurately assess the situation, it would be necessary to look at longer-term data and take into account changes in population size.
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factor the common factor of 9x + 36
9 is the common factor of 9x + 36.
What is Number system?A number system is defined as a system of writing to express numbers.
The given expression is 9x+36
Factor is a number or algebraic expression that divides another number or expression evenly i.e., with no remainder.
The factors of 9 are 1,3,9
The factors of 36 are 1,2,3,4,6,9,12 and 18
The highest common factor is 9.
Take 9 as common from the expression.
9(x+4)
Hence, 9 is the common factor of 9x + 36.
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Emilio has a bank account that pays 4% interest each year. He has $200 in his account. How much interest will he earn after 1 year?
if you answer this right you will get extra brainly points
Answer:
Step-by-step explanation:
That"ll be 37% hope this helps:))
PLEASE HELP ASAP
The table represents a linear relationship.
x −2 0 2 4
y −1 0 1 2
Which of the following graphs shows this relationship?
A graph of a line passing through the points negative 2 comma negative 4 and 0 comma 0
B graph of a line passing through the points negative 2 comma negative 1 and 0 comma 0
C graph of a line passing through the points negative 2 comma 4 and 0 comma 0
D graph of a line passing through the points negative 2 comma 1 and 0 comma 0
A graph which shows this relationship is: B. graph of a line passing through the points negative 2 comma negative 1 and 0 comma 0.
How to determine the linear function?In order to determine the ordered pairs and linear function that could represent a linear relationship in the given table, we would have to determine the slope of based on the data points.
In Mathematics, the slope of a linear function can be calculated by using this this mathematical expression;
Slope = (Change in y-axis, Δy)/(Change in x-axis, Δx)
Slope = (y₂ - y₁)/(x₂ - x₁)
Slope = (0 + 1)/(0 + 2)
Slope = 1/2
Slope = 0.5.
At data point (-2, -1), a linear function of this line can be calculated in point-slope form as follows:
y - y₁ = m(x - x₁)
Where:
m represents the slope.x and y represents the data points.y + 1 = 0.5(x + 2)
y = 0.5x + 1 - 1
y = 0.5x
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The area of a rectangle is 91 square inches. If the length of the rectangle is 1 less than twice its width, write an equation that could be used to find the width, w, of the rectangle.
The quadratic equation to find the width of the rectangle by formulating the area and length value is 2w² - w - 91 = 0.
What is area?
An object's area is how much space it takes up in two dimensions. It is the measurement of the quantity of unit squares that completely cover the surface of a closed figure.
The value for the area of the rectangle is given as = 91 in²
Let the width for the rectangle be = w
Then the length of the rectangle is 1 less than twice its width, l = (2w - 1)
The formula for the area of the rectangle is -
Area = length × width
Substitute the values to get the equation for width -
91 = (2w - 1) × w
Use the arithmetic operation of multiplication -
91 = w(2w - 1)
91 = 2w² - w
Rearrange in quadratic form -
2w² - w - 91 = 0
Therefore, the equation is obtained as 2w² - w - 91 = 0.
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Which of the following numbers is irrational? (1 point)
a fraction with numerator negative 15 and denominator 4, a fraction with numerator negative 7 and denominator 9, square root of 4, π
The only number that is irrational is π
How to identify the number that is irrational?
An irrational number is a number that can't be written as the quotient between two integers.
Also, square roots of non-square numbers are irrational.
In this case, the options are:
-15/4
-7/9
√4
π
The first 3 of these are rational, and the only irrational one is π, which is the quotient betwen the cicumference and the diameter of a circle.
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Zara has a rectangular garden. The length of her garden is 12 feet and the width is 7 feet.
She extends the width of her garden by w feet to create a larger garden with a total perimeter
of 46 feet. Write an equation that can be used to determine the amount of feet, w, by which
Zara extends the width of her garden.
By how many feet does Zara extend the width of her garden? Show your work.
Enter your equation, answer, and work in the space provided.
Zara extends the width of her garden by 11 feet. This can be calculated with the help of perimeter formula:
Equation used to solve the problem: P = 2L + 2W
2(12) + 2W = 46
24 + 2W = 46
2W = 22
W = 11
Zara extends the width of her garden by 11 feet.
The complete length of a shape's boundary is referred to as the perimeter in geometry. A shape's perimeter is calculated by adding the lengths of all of its sides and edges.
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Subtract x² - 6x from 5x² - 7x - 10.
Answer:
-4x^2 + x + 10
Step-by-step explanation:
see the image below for further details. Hopefully, it’s correct! :)
what sampling technique is being used in this scenario? voters are selected at random from an alphabetical list of all registered voters.
The sampling technique being used in this scenario is simple random sampling.
Simple Random Sampling TechniqueIt can be determined that simple random sampling is being used because individuals are selected at random from an alphabetical list of all registered voters. In simple random sampling, a random sample of individuals is selected from a larger population using a random procedure such as using a random number generator or drawing names out of a hat. The selection of individuals is completely random and every individual in the population has an equal chance of being selected.
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