Answers
Step-by-step explanation:
Hope this helps and learn well
Related Questions
HELP ME!,!,,,! I’ve been waiting for 30 minutes
Round each fraction to 0,1/2 or 1 use a number line if needed.
5/9
12/13
2/13
Answers
Answer:
5/9=1/2
12/13=1
2/13=0
Step-by-step explanation:
These are just based on what I think and also
5/9=0.55... so closer to 0.5 which =1/2
12/13 is just really close to 13/13
2/13 is really close to 0/13 rather than 6.5/13, which is 1/2
Considering that the number of victims by femicide shows an approximately linear behavior (use the segment 2012 to 2014), it establishes the mathematical model that expresses said behavior.
Answers
Knowing that the number of victims by femicide shows an approximately linear behavior, a mathematical model can be obtained through the following equation:
y - y₀ = [(y₁ - y₀) / (x₁ - x₀)]·(x - x₀)
¿How to find a mathematical model associated with the number of victims by femicide?Considering that the behavior is linear, a mathematical model can be obtained from the following equality that allows us to find the equation of a straight line:
y - y₀ = [(y₁ - y₀) / (x₁ - x₀)]·(x - x₀)
Where P(x₀, y₀) and Q(x₁, y₁) are points that belong to the line, that is, they belong to linear behavior.
¡Hope this helped!
Use the given transformation to evaluate the integral.
∬R 3x^2 Da, where R is the region bounded by the ellipse 25x2 + 9y^2 = 225;
X = 3u,
Y = 5v
Answers
Answer:
hey all u have to do is get better but the answer is 45
Step-by-step explanation:
The answer of this question is π (3/2).
To evaluate the given integral using a change of variables t.
Letting x = 3u and y = 5v, we have:
3x^2 = 3(3u)^2 = 27u^2
The Jacobian of the transformation is:
| ∂x/∂u ∂x/∂v |
| ∂y/∂u ∂y/∂v |
= | 3 0 |
| 0 5 |
So the differential element Da in terms of u and v is:
Da = | 3 0 | du dv
| 0 5 |
Thus, we can express the given integral in terms of u and v as follows:
∬R 3x^2 Da = ∬R 27u^2 (3 0) du dv
(0 5)
where R is the region in the uv-plane corresponding to the region bounded by the ellipse 25x^2 + 9y^2 = 225 in the xy-plane.
To find the limits of integration, we need to determine the range of u and v that corresponds to the region R. Substituting x = 3u and y = 5v into the equation for the ellipse, we get:
25(3u)^2 + 9(5v)^2 = 225
225u^2 + 45v^2 = 1
Dividing by 225, we have:
u^2/1/5^2 + v^2/1/3^2 = 1
This is the equation of an ellipse with semi-axes of length 1/5 and 1/3 along the u and v axes, respectively. Thus, the region R is the ellipse with semi-axes of length 1/5 and 1/3 centered at the origin in the uv-plane.
To find the limits of integration, we can parameterize the ellipse as follows:
u = (1/5)cos(t)
v = (1/3)sin(t)
where 0 ≤ t ≤ 2π.
Integrating with respect to cos(t) first, we get:
∬R 3x^2 Da = 27/50 ∫₀²π [(3/2)sin(t)cos(t) + (3/4)cos(2t)sin(t)]|₀¹ d(t)
= 27/50 ∫₀²π (3/2)sin(t)cos(t) + (3/4)cos(2t)sin(t) d(t)
Using the identity sin(2t) = 2sin(t)cos(t) , we get the answer π (3/2).
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match the correct base shape to each prism. some cards may be used more than once.
Answers
Looking at figure A, we have a prism with a triangular base that looks like a right triangle.
Since the prism has a right triangular base, the base shape is a right triangle (shape 5).
Looking at figure B, we have a prism with a pentagonal base.
Since the prism has a pentagonal base, the base shape is a pentagon (shape 1).
Looking at figure C, we have a prism with a triangular base that looks like an equilateral triangle.
Since the prism has an equilateral triangle base, the base shape is an equilateral triangle.(shape 4).
Looking at figure D, we have a prism with a triangular base that looks like an equilateral triangle.
Since the prism has an equilateral triangle base, the base shape is an equilateral triangle.(shape 4).
When finding the margin of error for the mean of a normally distributed population from a sample, what is alpha, assuming a confidence level of 74%?
Answers
The value of α = 0.26 finding by using normal distribution.
What is a normal distribution?A normal distribution is an arrangement of a data set in which most values cluster in the middle of the range and the rest taper off symmetrically toward either extreme.
Given that,
confidence level = 74%
alpha = ?
The significance level α is the probability of making the wrong decision when the null hypothesis is true. Alpha levels which is also called as significance levels are used in hypothesis tests.
Mathematically, the value of α is determined by subtracting the level of confidence from 1, and then writing the result as a decimal.
As the confidence level is given as 74%, so the significance level would be,
α = 1 - confidence level
= 1 - 0.74
α = 0.26
Hence, The value of α = 0.26.
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A trapezium has an area of 150cm^2.
The lengths of its parallel sides are 4.8 cm and 5.2 cm.
What is the perpendicular height of the trapezium?
Answers
Step-by-step explanation:
Area of Trapezium=1/2 (a+b)h =>
1/2(4.8+5.2)h=15 => h=15/5 =3 cm Ans
Area of trapezium = ½ x (Sum of parallel sides) x (perpendicular distance between the parallel sides).
A = 1/2 h(a+b)
150 = 1/2 h(4.8+5.2)
150 = 5h
h = 30 cm
Answer - perpendicular height of the trapezium is 30 Cm
Which property of equality was used to solve this equation
9x = 88
9x/9=88/9
X+9 7/9
A.addition property of equality
B.subtraction property of equality
C.multiplication property of equality
D.division property of equality
Answers
Answer:
Step-by-step explanation:
Given the equation 9x = 88, to get the value of x we will apply the division property of inequality. The division property of equality is the property applied to an expression by dividing both sides of an expression with the same constant without compromising the equality sign i.e after division, the expression at both sides of the expression still remains unchanged.
From the expression
9x = 88
Divide both sides by the coefficient of x i.e 9 (division property of equality)
9x/9=88/9
x = 9 7/9
Hence the property that was used to solve the equation is the division property of equality
Answer:Division property of equality
Step-by-step explanation: I did the quiz
Daniel uses \large \frac{2}{3}cup of orange juice for every \large \frac{1}{4}cup of carrot juice to make his drink. Enter the number of cups of orange juice Daniel uses for 1 cup of carrot juice. Enter answer as an improper fraction (ex. 7/3) or mixed number (ex. 2 1/3). Daniel uses cups of orange juice for 1 cup of carrot juice.
Answers
Answer:
\(\dfrac{8}{3}\ \text{cups of orange juice}\) or \(2\dfrac{2}{3}\ \text{cups of orange juice}\) is used
Step-by-step explanation:
Daniel uses the proportions of \(\dfrac{2}{3}\) cups of orange juice and \(\dfrac{1}{4}\) cups of carrot juice to make a mixed juice.
Now, in the question 1 cup of carrot juice is used. So 4 times of the proportion of the carrot juice is used. Accordingly 4 times of the cups of orange juice will be used.
\(\dfrac{2}{3}\ \text{cups of orange juice}=\dfrac{1}{4}\ \text{cups of carrot juice}\\\Rightarrow 4\times \dfrac{2}{3}\ \text{cups of orange juice}=4\times \dfrac{1}{4}\ \text{cups of carrot juice}\\\Rightarrow \dfrac{8}{3}\ \text{cups of orange juice}=1\ \text{cup of carrot juice}\)
So for one cup of carrot juice \(\dfrac{8}{3}\ \text{cups of orange juice}\) or \(2\dfrac{2}{3}\ \text{cups of orange juice}\) is used.
Acellus
Dan bought 4 pounds of chicken and 5
pounds of beef at the store. How many
pounds of meat did Dan buy total?
Give your answer as a mixed number in simplest form.
Enter the number that belongs in the green box.
[?] pounds
Foter
Answers
Answer:
9 pounds
Step-by-step explanation:
T/F: an example of a weight used in the calculation of a weighted index is quantity consumed in a base period.
Answers
False. The quantity consumed in a base period is not an example of a weight used in the calculation of a weighted index.
In the calculation of a weighted index, a weight is a factor used to assign relative importance or significance to different components or categories included in the index. These weights reflect the contribution of each component to the overall index value. The purpose of assigning weights is to ensure that the index accurately reflects the relative importance of the components or categories being measured.
An example of a weight used in a weighted index could be market value, where the weight is determined based on the market capitalization of each component. This means that components with higher market values will have a greater weight in the index calculation, reflecting their larger impact on the overall index value.
On the other hand, the quantity consumed in a base period is not typically used as a weight in a weighted index. Instead, it is often used as a reference point or benchmark for comparison. For example, in a price index, the quantity consumed in a base period is used as a constant quantity against which the current prices are compared to measure price changes.
Therefore, the statement that the quantity consumed in a base period is an example of a weight used in the calculation of a weighted index is false.
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the quadratic $2x^2+5x+12=19-7x$ has two solutions. what is the positive difference between these solutions?
Answers
The positive difference between the two solutions of the quadratic equation \(2x^{2}\) + 5x + 12 = 19 -7x is \(\frac{\sqrt{200} }{4}\).
We are required to determine the positive difference between the two solutions of the given quadratic equation: \(2x^{2}\) + 5x + 12 = 19 -7x
1. Move all terms to the left side of the equation to form a standard quadratic equation:
\(2x^{2}\) + 5x + 12 + 7x - 19 = 0
2. Simplify the equation: \(2x^{2}\) + 12x - 7=0.
3. Use the quadratic formula to find the solutions for x:
\(x = \frac{-b \pm \sqrt{b^{2} -4ac}}{2a}\)
where a=2, b=12, and c=-7.
4. Substitute the values:
\(x = \frac{-12 \pm \sqrt{12^{2} -4(2)(-7)}}{2(2)}\)
5. Simplify the expression:
\(x = \frac{-12 \pm \sqrt{144 + 56}}{4}\)
6. Calculate the value under the square root:
\(x = \frac{-12 \pm \sqrt{200}}{4}\)
7. Now, we have two solutions:
\(x_{1} = \frac{-12 + \sqrt{200}}{4}x_{2} = \frac{-12 - \sqrt{200}}{4}\)
8. Find the difference between the solutions:
\(x_{1} - x_{2}\) = \(\frac{\sqrt{200} }{4}\)
The positive difference between the two solutions is\(\frac{\sqrt{200} }{4}\).
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On a coordinate plane, 2 trapezoids are shown. Trapezoid A B C D has points (negative 2, 4), (2, 4), (negative 3, 0) and (3, 0). Trapezoid E F G H has points (negative 1, 2), (1, 2), (negative 2, 0) and (2, 0).
Derek tried to dilate the isosceles trapezoid ABDC with the center of dilation at the origin with a scale factor of 2. Check his work and complete the statements.
The slope of AC is .
The slope of EG is .
The polygons are not dilations of each other because .
Answers
Answer:
Slope AC is 4
Slope EG is 2
It isn't a dilatation because corresponding sides are not parallel.
what does the univariate t test tell you that the bivariate correlation test alone does not? what does the bivariate test tell you that the univariate test does not tell you?
Answers
In univariate data, only one variable is assessed for each person. Two variables are measured for each person in bivariate data.
The definition of univariable data is "one variable," and it is generally understood to be one sort of data. It is one of the straightforward methods for data analysis. The data in univariable data only include one variable.
The cat's weight, for instance, is 10, 15, 25, 27, 30, 35, and 40.
The variable is hence "Cat weight."
The definition of bivariate data is "Two Variable," and it essentially consists of two different forms of data. It is a straightforward type of statistical analysis.
Only one variable is analysed at a time in univariate statistics. Two variables are compared in bivariate statistics. Multiple variables are compared using multivariate statistics.
In a bivariate analysis, the correlations between the two variables are measured. When there are more than two variables in the data set, a more complicated statistical analysis technique called multivariate analysis is utilized.
Therefore,
In univariate data, only one variable is assessed for each person. Two variables are measured for each person in bivariate data.
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ANYONE HELP ! In Paris metro station, in a week 320 trains arrived. Out of these 5% arrived early and 15% arrived late. How many arrived on time?
Answers
Answer:
256 train or 80% of the trains arrived on time
Step-by-step explanation:
Total trains that arrived in a week = 320 trains
Late = 5% of 320
early = 15% of 320
On time = 320 - (15 + 5% of 320)
=> 320 - (20% * 320)
=> 320 - 64
=> 256
Therefore, 256 train or 80% of the trains arrived on time
Hope my answer helps :)
A concave lens refracts parallel rays in such a way that they are bent away from the axis of the lens. For this reason, a concave lens is referred to as a diverging lens
Answers
a) The image fοrmed by a cοncave lens using ray tracing technique is diagram (c).
b) The object should be placed 9.367 cm from the concave lens.
c) The magnificatiοn prοduced by the cοncave lens is -0.395.
Given:
Focal length = -7.50 cm
Image distance = 3.7 cm
a) Frοm the given diagrams, the image fοrmed by a cοncave lens using ray tracing technique is diagram (c).
b) Using the lens formula:
1/f = 1/v + 1/u
Rearranging the formula
1/u = 1/f - 1/v
Substituting the values back to formula as
1/u = 1/ (-7.5) - 1/ (3.7)
u = 3.70 / (0.133 + 1/3.70)
u = 3.70 / 0.395
u = 9.367 cm
Therefore, the οbject shοuld be placed 9.367 cm frοm the lens.
c) magnification = -(v/u)
Substituting the given values into the formula, we have:
magnification = -3.70 / 9.367
= -0.395
Therefore, the magnification is -0.395.
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The question attached here seems to be incomplete, the complete question is
Consider the following diagrams, where F represents the focal point of a concave lens. In these diagrams, the image formed by the lens is obtained using the ray tracing technique. Which diagrams are accurate?(Figure 1)
A)Type A if you think that only diagram A is correct, type AB if you think that only diagrams A and B are correct, and so on.
B)If the focal length of the concave lens is -7.50cm , at what distance do from the lens should an object be placed so that its image is formed 3.70cm from the lens?
Express your answer in centimeters.
do= cm
C)What is the magnification m produced by the concave lens described in Part B?
omg im so sorry but i need help again guys:(
Answers
The expression for the side length of the bulletin board is √n (option B).
What is the expression for the side length?A square is an object with four sides that are of equal length. The sum of angles in a square is 360 degrees. A square has two diagonals that are of equal length that bisect each other at a right angle.
The area of a square can be determined by calculating the square of a side length.
The area of a square = length x length
= length²
If the area of a square is given, to determine its side length, find the square root of the area.
Length of a side = √area
√n
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What is 0.895 repeating simplified in a fraction
Answers
Answer:
\(\dfrac{887}{990}\)
Step-by-step explanation:
Multiply by 100, subtract the original and divide the result by 99.
\(x=0.8\overline{95}\\100x=89.5\overline{95}\\100x-x=89.5\overline{95}-0.8\overline{95}=88.7\\99x=88.7\\\\x=\dfrac{88.7}{99}=\boxed{\dfrac{887}{990}}\)
Hazel buys a dress that costs $50.00 she pays 5% sales tax.
Answers
Answer:
what is the question?
Step-by-step explanation:
Name a pair of vertical angles
Name a pit of adjacent angles
If m
Can someone help I’m confused I never learned this
Answers
Answer: Vertical: angles ABF and DBE. Adjacent: angles ABC and CBD
Step-by-step explanation:
vertical angles are angles that share a common point. they are right across from each other, and in this case, share point B. adjacent angles are angles that are directly next to each other, and share a line or segment. in this case, the two angles share the segment BC. hope this helps.
Mike needs to tile his bathroom . His bathroom is 8 feet by 7 feet How much tile does he need to cover the area of his bathroom ?
Answers
Answer:
56 Sq Ft
Step-by-step explanation:
8x7= 56
What are the dimensions of the rectangle
Answers
The dimensions of the rectangle are 20.5 and 26.5 units, respectively
How to determine the dimensions of the rectangle?The figure represents the given parameters
On this figure, we have
Length = 5.5x - 1.5
Width = 6x + 2.5
Perimeter = 94
Shape = rectangle
The perimeter of a rectangle is calculated as
Perimeter = 2 * (Length + Width)
Substitute the known values in the above equation, so, we have the following representation
2 *(5.5x - 1.5 + 6x + 2.5) = 94
Divide by 2
(5.5x - 1.5 + 6x + 2.5) = 47
So, we have
11.5x + 1 = 47
Evaluate the like terms
11.5x = 46
Divide
x = 4
Recall that
Length = 5.5x - 1.5
Width = 6x + 2.5
So, we have
Length = 5.5 x 4 - 1.5 = 20.5
Width = 6 x 4 + 2.5 = 26.5
Hence, the length and the width are 20.5 and 26.5 units, respectively
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given a population standard deviation of 6.8, what sample size is required to be 90onfident that the estimated mean has an error less than 0.02?
Answers
The formula for calculating the required sample size to estimate the population mean with a 90% confidence level is given by:
n = ((z_(α/2)×σ) / E)²Here, z_(α/2) is the z-value for the given level of confidence (90% in this case), σ is the population standard deviation (6.8 in this case), and E is the maximum error we can tolerate (0.02 in this case).
Substituting the given values in the formula, we get:
n = ((z_(α/2)×σ) / E)²n = ((1.645×6.8) / 0.02)²n = 1910.96
Rounding up to the nearest whole number, we get the required sample size to be 1911.
Therefore, a sample size of 1911 is required to estimate the population mean with a 90% confidence level and an error of less than 0.02.
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The 99% confidence interval of a population mean is (1,7). One of the following is the 95% confidence interval. Which is it?
(a) (2,6)
(b) (1,6)
(c) (0,8)
(d) (2,7)
Answers
Given that, The 99% confidence interval of a population mean is (1,7). We need to find the 95% confidence interval.As the confidence interval becomes wider as the confidence level increases. Hence, the 95% confidence interval will have a greater range than the 99% confidence interval.Confidence interval can be calculated by the formula:Confidence Interval = $\overline{X}$ ± Zα/2 (σ/√n)Where, $\overline{X}$ is the sample mean.Zα/2 is the critical valueσ is the population standard deviationn is the sample sizeNow, Zα/2 for 99% confidence interval is 2.576 as per the normal distribution table.In the same way, Zα/2 for 95% confidence interval is 1.96.Converting the above formula for 95% confidence interval:1.96 = (1,7 - $\overline{X}$)/(σ/√n)On solving the above equation, we get: σ/√n = 0.2039σ = 0.2039 √n.....(1)Also, (1,7 - $\overline{X}$)/σ = 1.96....(2)Substituting equation (1) in equation (2), we get:(1,7 - $\overline{X}$)/ (0.2039√n) = 1.96On solving this equation, we get:$\overline{X}$ = 1.47 √n + 1.7...........(3)Now, for option (a), (b), (c) and (d), we need to verify which option satisfies the equation (3).Let's check for option (a):(2+6)/2 = 4............taking the average1.47 √n + 1.7 = 4n = 19.22 squaring both sidesn = 363.6Hence, option (a) is the correct answer.Write the answer in main part:The 95% confidence interval is (2,6).Explanation:On solving the equation, we get that the option (a) is correct. Therefore, the 95% confidence interval is (2,6).Conclusion:Therefore, option (a) (2,6) is the correct 95% confidence interval.
The 95% confidence interval for the population mean is given as follows:
c) (2,6).
How to obtain the 95% confidence interval for the population mean?The 99% confidence interval for the population mean is given as follows:
(1,7).
Hence the sample mean is given as follows:
(1 + 7)/2 = 4.
Meaning that the mean of the two bounds in the interval must be of 4.
The 95% confidence interval is narrower than the 99% confidence interval, hence, considering the mean of the bounds of 4, option c is the correct option for this problem.
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Consider a set of data in which the sample mean is 23.8 and the sample standard deviation is 6.6. Calculate the z score given that x= 26.7 round your answer two decimal places.
Answers
SOLUTION
Given the question in the image, the following are the solution steps to answer the question.
STEP 1: Write the given data
\(\begin{gathered} mean(\mu)=23.8 \\ standard\text{ }deviation(\sigma)=6.6 \\ x=26.7 \end{gathered}\)STEP 2: Write the formula for calculating z-scores
\(z=\frac{x-\mu}{\sigma}\)By substitution,
\(\begin{gathered} z=\frac{26.7-23.8}{6.6}=\frac{2.9}{6.6}=0.43939393939 \\ \\ z\approx0.44 \end{gathered}\)Hence, the z score is approximately 0.44 to 2 decimal places
Write the exponential as a radical. Assume that all variables represent positive real numbers. Use the definition that takes the root first. 8x^(5/4)
Answers
The exponential \(8x^\frac 54\) as a radical is \(8\sqrt[4]{x^5}\)
How to rewrite the exponential as a radicalFrom the question, we have the following parameters that can be used in our computation:
\(8x^\frac 54\)
When expanded, we have
\(8(x^5)\frac 14\)
Express as radical
\(8\sqrt[4]{x^5}\)
Hence, the exponential as a radical is \(8\sqrt[4]{x^5}\)
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I NEED THIS RIGHT NOW!!!
One roll of wallpaper covers 300 square feet. What is the least number of rolls of wallpaper needed to cover the walls of a room in the shape of a rectangular prism with a length of 15 feet, a width of 15 feet, and a height of 9 feet?
Answers
Answer: 2 rolls
Step-by-step explanation:
the area of the walls only in this room is 4(15x9) = 540 ft²
If one roll of wallpaper covers 300 square feet, divide the surface area of the walls by 300. Round to the next whole number to find the number of rolls:
540/300 = 1.8 rolls.
Since the rolls come in whole numbers, you will need 2 rolls of wallpaper to cover your walls.
find the indicated z-score. find the z-score for which the area under the standard normal curve to its left is 0.40 group of answer choices
Answers
The z-score for which the area under the standard normal curve to its left is 0.40 is -0.25.
To find the indicated z-score, we need to use the standard normal distribution table. The standard normal distribution table gives the area to the left of a particular z-score. So, in order to find the z-score for which the area to its left is 0.40, we need to look up the value 0.40 in the table and find the corresponding z-score.
Looking at the table, we can see that the z-score closest to an area of 0.40 is -0.25. This means that the z-score for which the area to its left is 0.40 is approximately -0.25.
Therefore, the answer is:
z = -0.25
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If the dartboard has a diameter of 14 inches and each number occupies 1/20 of the board, how much space does a single number occupy in square inches?
Answers
Answer:
Step-by-step explanation:
If the dartboard has a diameter of 14 inches, then the radius is 7 inches. The area of the dartboard is given by the formula for the area of a circle: A = pi x r^2, where pi is approximately 3.14 and r is the radius.
A = 3.14 x 7^2 = 153.86 square inches (rounded to two decimal places)
Each number occupies 1/20 of the board, so we need to divide the total area by 20 to get the area occupied by a single number:
153.86 / 20 = 7.69 square inches (rounded to two decimal places)
Therefore, a single number occupies approximately 7.69 square inches of space on the dartboard.
12 divided by 18/25 is?!?!
Answers
Answer:
16.6
Step-by-step explanation:
12 divided by 18/25 is 16.66.
Given:
12 divided by 18/25
12÷18/25
12÷0.72
=16.66
What is division?Division is one of the four basic operations of arithmetic, the ways in which numbers are combined to form new numbers. To divide rational expressions, multiply the first fraction by the reciprocal of the second. If we rewrite division as the product of the first expression by the inverse of the second, we add them all and look for common factors.
The way something is shared is called a sharing method. There are three types of distribution methods according to the degree of difficulty. They are division method or division by repeated subtraction, short division method or bus stop method and long division method.
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the spiking of a neuron can be modeled by the differential equation dθ dt = 1 −cosθ (1 cosθ)i,
Answers
To study the behavior of the neuron, one can analyze the solution of this differential equation or study its phase portrait to understand the different states and dynamics of the neuron's spiking activity.
The given differential equation represents the spiking behavior of a neuron. It can be written as:
dθ/dt = 1 - cos(θ)
This equation describes the rate of change of the membrane potential (θ) of the neuron over time (t). The right-hand side of the equation represents the input current to the neuron, which is influenced by the difference between the resting potential and the current potential.
The equation shows that the rate of change of θ with respect to time is proportional to 1 minus the cosine of θ. The cosine term represents the influence of the current potential on the spiking behavior of the neuron.
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