Answer:
x = 9
Step-by-step explanation:
the measure of the amount of random sampling error in a survey’s result is known as ____.
The measure of the amount of random sampling error in a survey's result is known as margin of error.
The margin of error is a statistical concept that quantifies the degree of uncertainty or sampling error associated with survey results. It provides an estimate of the range within which the true population parameter is likely to fall. The margin of error is typically expressed as a percentage and is based on the sample size and the level of confidence desired.
In survey research, random sampling error refers to the natural variability that occurs when a subset of individuals, known as the sample, is selected to represent a larger population. It arises because the sample is not an exact replica of the entire population. The margin of error takes into account this inherent variability and provides a measure of how much the survey results might deviate from the true population values.
A larger sample size generally leads to a smaller margin of error, as it reduces the random variability associated with sampling. Similarly, a higher level of confidence, such as 95% confidence level, results in a larger margin of error to account for a wider range of potential values.
By considering the margin of error, survey researchers can assess the reliability and precision of their findings, providing a range of values within which the true population parameter is likely to reside.
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how many solutions does x^2=7 have in each of the following rings?You need not find the solutions(a) Z/19 (b) Z/21 (c) Z/57
The solution of the expression is Z/57
A ring is a mathematical structure that combines the properties of an additive group with the properties of a multiplicative group.
When we look at solutions to the equation x² = 7 in different rings, we are asking "In what mathematical structures can we find numbers which, when squared, equal 7?"
(a) In the ring Z/19, the solutions are the residue classes modulo 19 that satisfy x² = 7. This means that we only consider the integers 0, 1, 2, ..., 18, and we take their remainders after dividing by 19. In this ring, we use the operations of addition and multiplication modulo 19.
(b) In Z/21, the equation x² = 7 has no solutions. This is because none of the remainders 0, 1, 2, ..., 20 after dividing by 21 can be squared to give 7.
(c) In Z/57, the equation x² = 7 has exactly 2 solutions. This is because there are exactly two residue classes modulo 57 that, when squared, give 7. To find these two solutions, we would need to perform a bit of calculation to determine which residues satisfy x² = 7.
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find the midpoint between (2,4) and (6,10)
Answer:
3,5
Step-by-step explanation:
how many unique slip planes of the {110} type are in a bcc metal?how many unique slip planes of the {110} type are in a bcc metal?2468122448
As per the mentioned informations, there are 4 slip planes associated with each of the 3 unique <111> directions, giving a total of 12 unique {110} slip planes in a body-centered cubic (BCC) crystal
In a body-centered cubic (BCC) crystal, there are 12 slip systems of the {110} type. Each of these slip systems is associated with a unique slip plane.
To understand why there are 12 slip systems, consider that the {110} plane has two perpendicular <111> directions, which are the directions of maximum atomic density in a BCC crystal. Each of these <111> directions can be associated with four equivalent {110} slip planes, which intersect at a line that lies along the <111> direction.
Therefore, there are 4 slip planes associated with each of the 3 unique <111> directions, giving a total of 12 unique {110} slip planes in a BCC metal.
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four cubes of volumes $1 \text{ cm}^3$, $8 \text{ cm}^3$, $27 \text{ cm}^3$, and $125 \text{ cm}^3$ are glued together at their faces. what is the number of square centimeters in the smallest possible surface area of the resulting solid figure?
Answer: 194
Step-by-step explanation:
From the volumes, we deduce that the side lengths of the cubes are 1 cm, 2 cm, 3 cm, and 5 cm. We position the cubes as follows:
[asy]
unitsize(0.5 cm);
draw((0,0)--(5*dir(-30))--(5*dir(-30) + 5*dir(30))--(10*dir(-30))--(5*dir(-30) + 5*dir(-90))--(5*dir(-90))--(0,0));
draw((5*dir(-30))--(5*dir(-30) + 5*dir(-90)));
draw((0,0)--(0,2)--((0,2) + 2*dir(-30))--(2*dir(-30)));
draw((0,2)--((0,2) + 2*dir(30))--((0,2) + 2*dir(30) + 2*dir(-30))--(2*dir(30)));
draw((2*dir(-30))--(2*dir(-30) + dir(30))--(2*dir(-30) + dir(30) + (0,1))--(2*dir(-30) + 2*dir(30) + (0,1))--(2*dir(-30) + 2*dir(30) + (0,2)));
draw((2*dir(-30) + dir(30))--(3*dir(-30) + dir(30))--(3*dir(-30) + dir(30) + (0,1))--(2*dir(-30) + dir(30) + (0,1)));
draw((3*dir(-30) + dir(30) + (0,1))--(3*dir(-30) + 2*dir(30) + (0,1))--(2*dir(-30) + 2*dir(30) + (0,1)));
draw((2*dir(30) + (0,2))--(2*dir(30) + (0,3))--(2*dir(30) + 3*dir(-30) + (0,3))--(2*dir(30) + 3*dir(-30))--(dir(30) + 3*dir(-30)));
draw((2*dir(30) + (0,3))--(5*dir(30) + (0,3))--(5*dir(30) + 3*dir(-30) + (0,3))--(5*dir(30) + 3*dir(-30))--(5*dir(30) + 5*dir(-30)));
draw((3*dir(-30) + 2*dir(30))--(3*dir(-30) + 5*dir(30)));
draw((3*dir(-30) + 2*dir(30) + (0,3))--(3*dir(-30) + 5*dir(30) + (0,3)));
[/asy]
The surface area of a cube with side length $s$ is $6s^2$, so the total surface area of the cubes is $6 \cdot 1^2 + 6 \cdot 2^2 + 6 \cdot 3^2 + 6 \cdot 5^2 = 234$.
Note that every pair of cubes touches, and furthermore, they have maximum contact. (This is why this solid has the smallest possible area.) The area of contact of the 1-cube and the 2-cube is 1 square centimeter, so we must subtract this twice from 234 (because this portion of the area from both the 1-cube and 2-cube is not seen anymore).
Doing this for every pair of cubes, we find that the surface area of this solid is $234 - 2 \cdot 1^2 - 2 \cdot 1^2 - 2 \cdot 1^2 - 2 \cdot 2^2 - 2 \cdot 2^2 - 2 \cdot 3^2 = \boxed{194}$.
francisco and meredith are 230 feet apart when they start walking toward one another. they are walking at the same speed, so whenever francisco travels some number of feet, meredith travels the same number of feet. let x x represent the number of feet francisco has traveled since he started walking toward meredith. write an expression in terms of x x that represents the number of feet francisco has walked toward meredith since they started walking. preview write an expression in terms of x x that represents the number of feet meredith has walked toward francisco since they started walking. preview write an expression in terms of x x that represents the total number of feet francisco and meredith have walked toward one another since they started walking. preview write an expression in terms of x x that represents the distance (in feet) between francisco and meredith. preview
The expressions are:
- Francisco's distance: x
- Meredith's distance: x
- Total distance: 2x
- Distance between Francisco and Meredith: 230 - 2x.
To answer your question, let's break it down into the different expressions:
1. The expression that represents the number of feet Francisco has walked toward Meredith since they started walking can be written as x.
2. The expression that represents the number of feet Meredith has walked toward Francisco since they started walking can also be written as x.
3. The expression that represents the total number of feet Francisco and Meredith have walked toward one another since they started walking can be written as x + x, which simplifies to 2x.
4. The expression that represents the distance between Francisco and Meredith can be written as 230 - (x + x), which simplifies to 230 - 2x.
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I NEED HELP ASAP PLEASE AND THANKS
find the area of the region that lies inside both curves. r = sin(2), r = cos(2)
The area of the region that lies inside both curves r = sin(2), r = cos(2 is:
0.266 square units.
For the area of the region that lies inside both curves, we need to determine the bounds for the angle θ.
We can do this by finding the points of intersection of the two curves.
r = sin(2) and r = cos(2) intersect when:
sin(2) = cos(2)
We can simplify this equation using the identity sin^2(x) + cos^2(x) = 1:
sin(2) = cos(2)
sin(2) = sin(π/2 - 2)
2 = π/2 - 2
π/4 = 2
So the curves intersect at θ = 2 and θ = π/2 - 2.
The area of the region can be found by integrating the function r with respect to θ over these bounds:
A = ∫[2, π/2 - 2] (1/2)r^2 dθ
We can express r in terms of θ using the identities:
sin(2θ) = 2sin(θ)cos(θ)
cos(2θ) = cos^2(θ) - sin^2(θ)
For the curve r = sin(2), we have:
r = sin(2θ) = 2sin(θ)cos(θ)
For the curve r = cos(2), we have:
r = cos(2θ) = cos^2(θ) - sin^2(θ) = 1 - 2sin^2(θ)
So the area of the region is:
A = ∫[2, π/2 - 2] (1/2)[sin^2(2θ) - (1 - 2sin^2(θ))^2] dθ
We can simplify this expression by expanding the second term:
A = ∫[2, π/2 - 2] (1/2)(sin^2(2θ) - 1 + 4sin^4(θ) - 4sin^2(θ)) dθ
A = ∫[2, π/2 - 2] (1/2)(4sin^4(θ) - 3sin^2(θ) - 1/2) dθ
Now we can integrate each term separately:
A = [4/5 sin^5(θ) - sin^3(θ)/3 - 1/2θ] [2, π/2 - 2]
A = [4/5 sin^5(π/2 - 2) - sin^3(π/2 - 2)/3 - π/4 + 1] - [4/5 sin^5(2) - sin^3(2)/3 - 2]
Using a calculator, we get:
A = 0.266 square units.
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What is substitute and example?
A substitute is a good or service that buyers can quickly swap out for another. For instance, a one-dollar bill can be used in place of another dollar bill.
In business and economics, a replacement, or substitutable good, is a good or service that consumers perceive as just being substantially the same as or reasonably similar to some other good. Consumers are given options and alternatives through substitutes, which also spur competition and lower prices in the market.
Here are a few examples of replacement goods:
1. A $1 bill can be exchanged for four quarters.
2. Coke against Pepsi
3. Regular vs. premium gas
4. Butter and lard
5. Tea and coffee
6. Apples and oranges
7. Comparing driving a car to riding a bike
8. Books in general and e-books
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Laila drew a polygon with coordinates A(-1,2), B(1, 2), C(1, -2), and D(-1, -2).
She then dilated the image and obtained another polygon with coordinates A'(-6, 12), B'(6, 12), and C'(6,
12).
Answer:becayse djr d,mstud bdn dhg furfhtb-=gvg
Step-by-step explanation:
what are all the values of c that will make x^2 cx 121 a perfect square ?
Answer:
c = -22, 22
Step-by-step explanation:
\( {(x - 11)}^{2} = {x}^{2} - 22x + 121\)
\( {(x + 11)}^{2} = {x}^{2} + 22x + 121\)
Subtract:
-4 – 2 =
Submit
What is the answer?
Answer:
-6
Step-by-step explanation:
The ratio of men to women working for a company is 7 to 5. If there are 312 employees total, how many women work for the company
100 POINTS TO DO THIS
DONT DO RANDOM THINGS
BE HONEST IF YOU KNOW HOW TO DO IT
DO IT !!!!!!!!
Solve for x .
1). 72= x-(-23)
2). -5x-(7-4x)=9
3). 8x+6=3(4-x)
4). 1/2(4x-16)=-2
Answer: See below.
Step-by-step explanation:
1) x=49
2) x=-16
3) x=6/11
4) x=3
Please give Brainliest if this helped you. Have a great day!
Answer:
1) x = 49
2) x = -16
3) x = ⁶/₁₁
4) x = 3
Step-by-step explanation:
Question 172 = x - (-23)
Apply rule -(-a) = a :
⇒ 72 = x + 23
Subtract 23 from both sides:
⇒ 72 - 23 = x + 23 - 23
⇒ 49 = x
⇒ x = 49
Question 2
-5x - (7 - 4x) = 9
Apply rule -(a - b) = -a + b :
⇒ -5x - 7 + 4x = 9
Collect and combine like terms:
⇒ -5x + 4x - 7 = 9
⇒ -x - 7 = 9
Add 7 to both sides:
⇒ -x - 7 + 7 = 9 + 7
⇒ -x = 16
Divide both sides by -1:
⇒ -x ÷ -1 = 16 ÷ -1
⇒ x = -16
Question 38x + 6 = 3(4 - x)
Distribute:
⇒ 8x + 6 = 12 - 3x
Add 3x to both sides:
⇒ 8x + 6 + 3x = 12 - 3x + 3x
⇒ 11x + 6 = 12
Subtract 6 from both sides:
⇒ 11x + 6 - 6 = 12 - 6
⇒ 11x = 6
Divide both sides by 11:
⇒ 11x ÷ 11 = 6 ÷ 11
⇒ x = ⁶/₁₁
Question 4¹/₂(4x - 16) = -2
Distribute:
⇒ 2x - 8 = -2
Add 8 to both sides:
⇒ 2x - 8 + 8 = -2 + 8
⇒ 2x = 6
Divide both sides by 2:
⇒ 2x ÷ 2 = 6 ÷ 2
⇒ x = 3
Find the coordinates of point Q that lies along the directed line segment from R(-2, 4) to S(18, -6) and partitions the segment in the ratio of 3:7.
Answer:
The coordinates of the point Q is (4, 1)
Step-by-step explanation:
The given parameters are;
The directed line segment extends from R(-2, 4), to S(18, -6)
The ratio in which the point Q partitions the directed line segment = 3:7
Therefore, the proportions of the R to Q = 3/(3 + 7) = 3/10 the length of RS
Which gives;
(-2 + (18-(-2))×3/10, 4 +(-6 -4)×3/10) which is (4, 1)
The coordinates of the point Q = (4, 1)
We check the length from R to S is given by the relation for length as follows
\(l =\sqrt{\left (y_{2}-y_{1} \right )^{2}+\left (x_{2}-x_{1} \right )^{2}}\)
Where;
R(-2, 4) = (x₁, y₁)
S(18, -6) = (x₂, y₂)
Length of segment RS = 22.36
length from R to Q = 6.7086
We check RQ/RS = 6.7082/22.36 = 0.3
Also QS/RS = (22.36 - 6.7082)/22.36 = 0.6999≈ 0.7
The coordinates of the point Q = (4, 1).
Roberto purchased airline tickets for his family. The tickets cost $1,250. The airline also charged a luggage fee, bringing the total cost to $1,400. What is the percent increase in the cost due to the luggage fee?
The cost increase is 12%.
The cost increase is 20%.
The cost increase is 48%.
The cost increase is 89%.
Answer: The answer is 12%
Step-by-step explanation:
Answer:
A.) THE COST INCREASE IS 12%.
Step-by-step explanation:
You are dealt one card from a 52-card deck. Find the probability you are not dealt a spade
Answer:
39/52
Step-by-step explanation:
What is the GCF of 2 and 12.
What is the GCF of 14 and 21.
I need this ASAP for a test I honestly just don't want to do all of this hahaha
Answer:
7
Step-by-step explanation:
14 2,7
21 3,7
Select the correct answer from each drop-down menu. Consider function f, where B is a real number. Complete the statement describing the transformations to function f as the value of B is changed. As the value of B increases, the period of the function , and the frequency of the function . When the value of B is negative, the graph of the function .
The answer through which all the value of the given relation satisfied the relation is period decreases, frequency increases and reflected in y - axis.
What about frequency?
In mathematics, frequency is a term used in statistics to describe how often a particular value or set of values appears in a dataset. Specifically, frequency refers to the number of times a particular data point or value occurs in a dataset.
For example, consider a dataset of test scores for a class of students. The frequency of a particular score (e.g., 80%) would be the number of students who received that score. The frequencies can be used to create a frequency distribution, which is a table that shows the frequency of each value or group of values in a dataset.
According to the given information:
In the given condition as the value of B increases, the periodic function decreases and the frequency of the function increases where as, when the value of B is negative, the graph of the function reflected in y-axis.
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NEED HELP/WILL MAKE BRAINLY
Jorge needs to paint the circular tops of five identical tables. Each table has a circumference of about 12.6 feet. He has a 1-pint can of paint, which will cover about 70 square feet of surface area.
Which statement is true for this situation?
Group of answer choices
He will have enough paint to put two coats of paint on all of the tables.
He will have enough paint to put one coat of paint on only four of the tables.
He will have enough paint to put one coat of paint on all of the tables.
He will have enough paint to put one coat of paint on only three of the tables.
Answer: He will have enough paint to put one coat of paint on all of the tables.
HELP ME PLEASE!!!!ITS DUE TODAY!!
Answer:
234
Step-by-step explanation:
1950 x 0.88 = 1716 paid
1950-1716 = 234
Use the following table to answer questions (a – c). x 1 2 3 4 7 8 10 y 9 7 6 1 -2 -5 -8 . b. Calculate the correlation coefficient. c. Based on your calculation in part (b) describe the correlation between the x and y. Explain your reasoning.
b. The correlation coefficient for this data-set is given as follows: r = -0.9877.
c. The correlation between the variables x and y is strong negative.
What is the correlation coefficient and how to obtain it?The correlation coefficient is an index between -1 and 1 that measures the relationship between two variables, as follows:
negative coefficient: inverse relationship.positive coefficient: direct relationship.absolute value greater than 0.6: strong relationship.absolute value less than 0.6: weak relationship.A data-set is composed by a set of points, and these points are inserted into a correlation coefficient calculator to obtain the coefficient.
From the table described in this problem, the points are given as follows:
(1, 9), (2, 7), (3,6), (4, 1), (7, -2), (8, -5) and (10, -8).
Inserting these points into a calculator, the coefficient is given as follows:
r = -0.9877.
Hence it is a negative and strong relationship, as the absolute value of r is of 0.9877 > 0.6.
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A rectangular vegetable garden will have a width that is 3 feet less than the length, and an area of 54 square feet. If x represents the length, then the length can be found by solving the equation:x(x-3)=54 What is the length, x, of the garden? The length is blank feet.
Answer:
9
Step-by-step explanation:
What you do if first you draw your rectangle. You name length as x (as told in the question) and width as x-3 (since the width is 3 feet less). To obtain the area you have to do x × (x-3) because to find area you do length × width right.
So area is x(x-3) and it also tells you that area is 54 there
That's how you get x(x-3)=54
Now to solve it, you have to expand
x(x-3)=54
x²-3x-54 = 0 (you have to factorise this now)
(x+6) or (x-9) = 0
x = -6 or x = 9
As you can see you have two answers there. We have to eliminate the -6 because length can never be negative. The logic is simple, any length you take for example on a ruler (it has to be 0 or above) you can measure 1 feet, 2 feet, even 100 feet but you can't measure less than 0 right?
So the final answer is that x=9 and x represents the length
So length = 9
Please help me here on this question
Answer:
B
Step-by-step explanation:
it's going to be as follows: you are going to take the current price of the shares which is $291,20 and ÷ it by the number of shares
thirteen patients were discharged from the medical service on august 15. the days of stay for each patient was 17, 3, 4, 25, 8, 7, 13, 10, 5, 11, 9, 21, and 1. the median days stayed for these patients was:
The median days stayed for these patients is 9 days.
To find the median days stayed for these thirteen patients, we first need to arrange the days of stay in order from least to greatest: 1, 3, 4, 5, 7, 8, 9, 10, 11, 13, 17, 21, 25.
The median is the middle value in this list, which is the value that has an equal number of values above and below it. Since we have an odd number of values, the median is simply the middle value, which in this case is 10.
Therefore, the median days stayed for these thirteen patients was 10.
The median days stayed for the thirteen patients discharged from the medical service on August 15 can be found by first arranging the data in numerical order and then identifying the middle value. The given days of stay for each patient are: 17, 3, 4, 25, 8, 7, 13, 10, 5, 11, 9, 21, and 1.
Arrange the data in ascending order: 1, 3, 4, 5, 7, 8, 9, 10, 11, 13, 17, 21, 25.
Since there are 13 patients, an odd number, the median will be the middle value, which is the 7th value in the ordered list.
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Find x
round your answer to the nearest tenth of a degree
Answer:
x ≈ 33.1°
Step-by-step explanation:
using the sine ratio in the right triangle
sin x = \(\frac{opposite}{hypotenuse}\) = \(\frac{12}{22}\) , then
x = \(sin^{-1}\) ( \(\frac{12}{22}\) ) ≈ 33.1° ( to the nearest tenth of a degree )
-100 ______ -101
A.>
B.<
C.=
Answer:
-100 > -101
Step-by-step explanation:
-100 > -101
Reason:
The negative number which is more closer to Zero it is always bigger than other.
-TheUnknownScientist
The locus of point equidistant from three vertices of a triangle is……………
Answer:
circumcenter
Step-by-step explanation:
You want to know the name of the point equidistant from the vertices of a triangle.
CircumcircleThe circle that passes through the vertices of a triangle is called a "circumcircle". It circumscribes the triangle. Its center is equidistant from all points on the circle, so is equidistant from the triangle's vertices.
The point equidistant from the vertices of a triangle is the circumcenter.
__
Additional comment
The circumcenter is at the intersection of the perpendicular bisectors of the sides of the triangle.
a decagon has how many more vertices than a hexagon?
Answer:
IT HAS 4 MORE THAN
Step-by-step explanation:
IT IS BCUZ HEXAGON HAS 6
DECAGON- 10
10-6=4
The ratio of rabbits to guinea pigs in a pet shop is 2:3. There are 12 rabbits in the pet shop. Circle the number of guinea pigs. 8 15 18 30
Answer: 18
Step-by-step explanation:
12 divided by 2 = 6
6 x 3 = 18
Answer:
the answer is 18
Step-by-step explanation:
this is because 12 divided by 2 = 6
6 x 3 = 18