Answer:
58.24
Step-by-step explanation:
1456 ÷ 25 = 58.24
Find the critical point of the given function and then determine whether it is a local maximum, local minimum, or saddle point. (Order your answers from smallest to largest xx, then from smallest to largest yy.)f(x,y)=(x−y)(xy−9)
The critical points of function f(x,y) are (0,0) and (2,1), and (2,1) is a local maximum.
To find the critical points of f(x,y), we need to find all values of (x,y) where the gradient of f(x,y) equals zero. The gradient of f(x,y) is given by:
∇f(x,y) = <(y-2xy), (x-2y^2)>
Setting each component of the gradient equal to zero yields two equations:
y - 2xy = 0
x - 2y^2 = 0
Solving these equations simultaneously, we obtain two critical points: (0,0) and (2,1).
To determine the nature of each critical point, we compute the Hessian matrix of f(x,y):
H(f) = [ 2y -2x ]
[-2y 4y ]
At (0,0), H(f) = [0 0; 0 0], which is a degenerate matrix. Therefore, we cannot use the second derivative test to determine the nature of this critical point.
At (2,1), H(f) = [2 -4; -2 4], which has a negative determinant and a positive trace. Therefore, by the second derivative test, we conclude that (2,1) is a local maximum.
In summary, the critical points of f(x,y) are (0,0) and (2,1), and (2,1) is a local maximum.
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alex makes a fruit puree by mixing blackcurrants and raspberries in the ratio 2:5 he then makes a milkshake by mixing milk and the fruit puree in the ratio 3:1. what fraction of his drink is made from blackcurrants?
For the given ratio of ingredients 3/14 of Alex's drink is made from blackcurrants.
What are ratios?Comparing two numbers or values using ratios, which are often stated as fractions or colons. In mathematics, ratios are used to represent connections between various objects or numbers, such as the ratio of a rectangle's length to breadth or the proportion of boys to girls in a class. Ratios can be sped up or stated in a variety of ways, such decimals or percentages.
The given ratio for blackcurrants to raspberries is 2:5.
The total ratio is:
2 + 5 = 7
Hence, the fraction of the puree made from blackcurrants is = 2/7.
Now, ratio of fruit puree to milk is 3:1 = 3 + 1 = 4.
Hence, the fraction of the milkshake made from fruit puree is = 3/4.
For blackcurrants we have:
(2/7) * (3/4) = 6/28 = 3/14
Hence, for the given ratio of ingredients 3/14 of Alex's drink is made from blackcurrants.
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What is the value of x in this triangle?
Enter your answer in the box.
X =
xº
44°
5
53°
6 7
(O
Answer:
83°
Step-by-step explanation:
the total angle of a triangle is 180° degree so 180°-(44°+53°)=83°
the expression when y=-6 y^2+8y-9
Answer:
-21
Step-by-step explanation:
y^2 + 8y - 9 y = -6
(-6)² + 8(-6) - 9
36 - 48 - 9
-21
So, the answer is -21
Answer:y=\frac{7}{12}-i\frac{\sqrt{167}}{12},\:y=\frac{7}{12}+i\frac{\sqrt{167}}{12}
Step-by-step explanation:y=\frac{7}{12}-i\frac{\sqrt{167}}{12},\:y=\frac{7}{12}+i\frac{\sqrt{167}}{12}
Given the triangle, find the length of X. Give your answer in simpliest radical form.
Answer:
x = 4[tex]\sqrt{2}[/tex]
Step-by-step explanation:
using the cosine ratio in the lower right triangle and the exact value
cos45° = [tex]\frac{1}{\sqrt{2} } }[/tex] , then
cos45° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{4}{x}[/tex] = [tex]\frac{1}{\sqrt{2} }[/tex] ( cross- multiply )
x = 4[tex]\sqrt{2}[/tex]
mass weighing 16 pounds is attached to a spring whose spring constant is 25 lb/ft. Find the equation of motion. (Use g = 32 ft/s2 for the acceleration due to gravity. Assume t is measured in seconds) *(t) = -16 cos(251) What is the period of simple harmonic motion (in seconds)?
The equation of motion of the system is, `x(t) = Acos(ωt + ϕ)` where `ω = √(k/m)` is the angular frequency of the system, `A` is the amplitude of motion, `ϕ` is the phase angle, `k` is the spring constant, and `m` is the mass attached to the spring. The period of simple harmonic motion (in seconds) is 0.628` seconds (approx).
The mass weighing 16 pounds is attached to a spring whose spring constant is 25 lb/ft.
So, the mass of the system `m = 16/32 = 0.5` slugs (1 slug = 32 lb.s^2/ft).
Thus, the angular frequency of the system is, `ω = √(k/m) = √(25/0.5) = 10` rad/s.
So, the equation of motion of the system is,x(t) = Acos(10t + ϕ)
Given that, x(0) = 16/25, x(t) = Acos(10t + ϕ) ...(1)
At t = 0, x(0) = Acosϕ = 16/25
So, `A = (16/25)/cosϕ`.
Therefore, by substituting `A` in equation (1), we get
x(t) = (16/25)/cosϕ × cos(10t + ϕ) = 0.64 cos(10t + ϕ)/cosϕ
Comparing this equation with the given equation, x(t) = -16 cos(251), we get`10t + ϕ = 251`, `cosϕ = -16/25`
Therefore, `ϕ = cos^{-1}(-16/25) = 123.7°`.The period of simple harmonic motion (in seconds) is given by,
`T = 2π/ω = 2π/10 = 0.628` seconds (approx).
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Given the following key, what polynomial is modeled by the diagram below?
The polynomial function modeled by the given diagram is given as follows:
p(x) = 3x² - 7x - 6.
How to obtain the polynomial function?The polynomial function modeled by the given diagram is obtained considering the keys of the problem, which are the terms represented by each figure.
The polynomial is constructed as follows:
3 large non-shaded squares: 3x².Two non-shaded rectangles: 2x.Nine shaded rectangles: -9x.Six shaded small squares: -6.Then the expression used to construct the polynomial is given as follows:
p(x) = 3x² + 2x - 9x - 6.
Combining the like terms, the polynomial function is defined as follows:
p(x) = 3x² - 7x - 6.
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I need help on this question(PLEASEEEE)
Answer:
Yes, No, No.
Explanation:
For the first system of equations, we substitute x=2 and y=1 into each equation and we see that both are satisfied. So (2, 1) is a solution for this system.For the second system of equations, substituting x=2 and y=1 into each equation, we get 1=-3 and 1=-2, which are not true, so (2, 1) is not a solution for this system.For the third system of equations, substituting x=2 and y=1 into each equation, we get -3=-2 and 1=-3, which are not true, so (2, 1) is not a solution for this system.
Answer:
Place an X for the first box as [Yes], [No], [No]
Step-by-step explanation:
When we enter x=2 and y=1 into the first system of equations, we can see that both conditions are met. Thus the answer to this system is (2, 1).
When x=2 and y=1 are substituted into the second system of equations, we obtain 1=-3 and 1=-2, which are false, and so (2, 1) is not a solution for this system.
When x=2 and y=1 are substituted into the third system of equations, the results are -3=-2 and 1=-3, which are false, hence (2, 1) is not a solution for this system.
Using the inverse transform method for discrete distribution, define a process for generating random variates from a binomial distribution with N 6 and p 0.4. (sixth decimal place.)
The another random variate from a binomial distribution with n=6 and p=0.4 has been generated as X=3.
The process of generating random variates from a binomial distribution using the inverse transform method for discrete distribution is done as follows:Step 1: Determine the probability mass function (pmf) of the binomial distribution with parameters n and p. For example, for a binomial distribution with n = 6 and p = 0.4, the pmf is given by:P(X=k) = (6 choose k)(0.4)^k(1-0.4)^(6-k), where k=0,1,2,3,4,5,6Step 2: Calculate the cumulative distribution function (CDF) of the binomial distribution by summing the pmf up to each value of k. The CDF is given by:F(k) = P(X ≤ k) = ΣP(X=i) for i=0 to k, where k=0,1,2,3,4,5,6Step 3: Generate a uniform random variate, U, between 0 and 1. For example, U=0.23456.Step 4: Find the smallest value of k such that F(k) ≥ U. This value of k is the random variate X. For example, if U=0.23456, then F(0)=0.10737, F(1)=0.38223, and F(2)=0.74304. Since F(1) is the smallest value of F(k) that is greater than or equal to U, X=1. Therefore, a random variate from a binomial distribution with n=6 and p=0.4 has been generated as X=1.To find another random variate from the same distribution, repeat steps 3 and 4. For example, U=0.987654, F(0)=0.10737, F(1)=0.38223, F(2)=0.74304, F(3)=0.91892, F(4)=0.98544, and F(5)=0.99856. Since F(3) is the smallest value of F(k) that is greater than or equal to U, X=3. Therefore, another random variate from a binomial distribution with n=6 and p=0.4 has been generated as X=3.
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Square root of
3a^2/10b^6
Answer:
Step-by-step explanation:
Rewrite
3
a
2
10
b
6
as
(
a
b
3
)
2
3
10
.
√
(
a
b
3
)
2
3
10
Pull terms out from under the radical.
a
b
3
√
3
10
Rewrite
√
3
10
as
√
3
√
10
.
a
b
3
⋅
√
3
√
10
Combine.
a
√
3
b
3
√
10
Multiply
a
√
3
b
3
√
10
by
√
10
√
10
.
a
√
3
b
3
√
10
⋅
√
10
√
10
Combine and simplify the denominator.
√
3
√
10
b
3
⋅
10
Simplify the numerator.
Tap for more steps...
a
√
30
b
3
⋅
10
Move
10
to the left of
b
3
.
a
√
30
10
b
3
Step-by-step explanation:
[tex]{ \tt{ \sqrt{ \frac{3 {a}^{2} }{10 {b}^{6} } } }} = { \tt{ \frac{ {(3a {}^{2}) }^{ \frac{1}{2} } }{ {(10b {}^{6} )}^{ \frac{1}{2} } } }} \\ \\ = { \tt{ \frac{a \sqrt{3} }{ {b}^{3} \sqrt{10} } }} \\ \\ = { \tt{ \frac{a \sqrt{3} }{ {b}^{3} \sqrt{10} } }}[/tex]
1/1 point (graded) Compute X(), the matrix of predicted rankings UVT given the initial values for U() and V (0). 2 1 (Enter your answer as a matrix, e.g., type [[2,1],[1,0],[3,-1]] for a 3 x 2 matrix 1 0 Note the square brackets, and 3 -1 commas as separators. ) [[24,12,6], [0,0,0], (12,6,3], [24 ✓ 24 12 6 0 0 0 12 6 3 24 12 6
The matrix of predicted rankings UVT is [[48,24,12],[0,0,0],[24,12,6]].
The matrix of predicted rankings UVT can be calculated using the formula UVT = UV.The provided initial values for U() and V(0) are as follows:U() = [[2,1],[1,0],[3,-1]]V(0) = [[24,12,6],[0,0,0],[12,6,3]]Using the above values, the matrix of predicted rankings UVT can be computed as follows:UVT = UVU = [[2,1],[1,0],[3,-1]]V = [[24,12,6],[0,0,0],[12,6,3]]UVT = [[2,1],[1,0],[3,-1]] x [[24,12,6],[0,0,0],[12,6,3]]= [[48,24,12],[0,0,0],[24,12,6]]Therefore, the matrix of predicted rankings UVT is [[48,24,12],[0,0,0],[24,12,6]].
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what is the significance of a pedigree symbol consisting of a square with a diagonal slash mark through it?
The significance of a pedigree symbol consisting of a square with a diagonal slash mark through it is that it represents the male members of the family
It is a standard symbol in a pedigree chart. This symbol represents the sex of a person, in this case, it represents the male sex. In other words, a square with a diagonal slash mark through it is used to represent the male gender in pedigree charts.
A pedigree chart is a diagram that shows the genetic relationships between individuals in a family. It is used to track genetic diseases or traits through generations. A pedigree chart can provide information about a family's medical history and can help doctors to understand how genetic disorders are inherited from one generation to the next. Each symbol used in the pedigree chart has a specific meaning.
The squares represent males while the circles represent females. The horizontal line between two symbols represents marriage, and the vertical line from a symbol represents a child of that union.
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1. If f = {(0,2), (-3,2), (2,5)} and g = {(3,4), (1,5), (-1,2)}, Find: f+g
Answer:
Step-by-step explanation:
F = (-1,9)
G = (-3,11)
data was collected from various hardware stores on the expected monthly revenue from rolls of chicken wire, based on the price per roll. the data is graphed in the scatter plot below. which equation best models the given graph?
The equation that best models the given graph is given by `y = -100x + 2200` where `y` represents the expected monthly revenue and `x` represents the price per roll.
The equation that best models the given graph of the expected monthly revenue from rolls of chicken wire, based on the price per roll, is given by `y = -100x + 2200` where `y` represents the expected monthly revenue and `x` represents the price per roll.Step-by-step explanation:The graph given below shows the expected monthly revenue from rolls of chicken wire, based on the price per roll.From the graph, we can see that as the price per roll increases, the expected monthly revenue decreases.
So, the equation that models this situation should have a negative slope.Now, let's find the slope of the line passing through the points `(20, 1200)` and `(0, 2200)` using the slope formula. The slope formula is given by:$$\text{slope} = \frac{y_2 - y_1}{x_2 - x_1}$$Here, we have `x_1 = 20`, `y_1 = 1200`, `x_2 = 0`, and `y_2 = 2200`. So, substituting the values, we get:$$\text{slope} = \frac{2200 - 1200}{0 - 20}$$$$\text{slope} = -\frac{1000}{20}$$$$\text{slope} = -50$$So, the equation of the line is of the form:$$y = mx + b$$where `m` is the slope and `b` is the y-intercept.From the graph, we can see that the y-intercept is `2200`.
So, substituting the values of `m` and `b` in the above equation, we get:$$y = -50x + 2200$$
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2x - 3 = 6 + x
2(2x-3)=6+x
Answer:
x = 9x = 4Step-by-step explanation:
2x - 3 = 6 + x
2x - 3 = 6 + x
2x - x = 6 + 3
x = 9
2. 2(2x-3)=6+x
2(2x - 3) = 6 + x
4x - 6 = 6 + x
4x - x = 6 + 6
3x = 12
x = 12 : 3
x = 4
Can y’all explain how to do this really don’t get it please thank you
Write the expression in complete factored
form.
3a(a + 1) + x(a + 1)
Answer:(a + 1) (3a + x)
Step-by-step explanation:
Factor a+1 out of 3a ( a + 1 ) + x (a + 1 )
Hope this helps
Which of the following steps were applied to ABC obtain AA'B'C'?
A. Shifted 4 units left and 4 units up
B. Shifted 4 units left and 2 units up
C. Shifted 2 units left and 4 units up
D. Shifted 2 units left and 2 units up
Correct Option is Shifted 2 units left and 4 units up
Define triangleA triangle is a geometric shape that is formed by three straight line segments that connect three non-collinear points. The three points where the segments intersect are called the vertices of the triangle, while the segments themselves are called the sides. The area enclosed by the sides of the triangle is called its interior, while the space outside the triangle is called its exterior.
Given are two trianglesThe vertices of ABC are (4, 6), (7, 6), and (5,9)
The transformed image A'B'C' has vertices as
(2,10) (5,10) (3,13)
We see a pattern when we compare the matching vertices.
The y coordinate is raised by 4, while the x coordinate is shrunk by 2.
This implies the transformation is
Shifted 2 units left and 4 units up
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Answer:
Shifted 2 units left and 4 units up
Step-by-step explanation:
hope this helps
Scientific research study tracks the growth of an insect in millimeters. The growth data for each insect in the study during week 1 are 1. 1, 1. 25, 1. 3, 1. 67, 1. 9, 2. 35, 2. 1, 2. 3, 1. 5, 1. 7, 2. 25, 2. 1, 2. 45, 1. 37, 1. 83. The scientist is preparing a histogram to show the distribution of growth across the population. How should the scientist break down his data into categories?
The scientist should group the data into categories or bins of 0.5 millimeters, such as 1.0-1.5, 1.5-2.0, and 2.0-2.5,
To create a histogram to show the distribution of growth across the population, the scientist needs to group the data into categories or bins. The size of the bins will determine the shape of the histogram and how well it represents the data.
One way to determine the bin size is to calculate the range of the data and divide it by the number of bins desired. Another approach is to use a standard bin size, such as 0.5 or 1.0.
For this particular data set, a reasonable bin size could be 0.5 millimeters. The data can then be grouped into the following bins:
1.0 - 1.5
1.5 - 2.0
2.0 - 2.5
This will result in three bins that cover the entire range of the data. The scientist can then count the number of insects that fall into each bin and create a histogram to show the distribution of growth across the population.
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WHAT IS THE CENTRAL ATOM OF NITRIC OXIDE (NO)
Answer:
The answer is Nitrogen
Hope this helps :)
Consider flow over a flat plate, and use the Thwaites-Walz method to predict d, d*, 8, and Cvs x. Compare the results with the predictions of the Pohlhausen method and the exact solution in Eqs. (2.21) and (2.22).
Considering flow over a flat plate, and by using the Thwaites-Walz method and the Pohlhausen method are very similar, but they differ significantly from the exact solution.
The Thwaites-Walz Method for flow over a flat plate:
The Blasius method can be used to obtain the non-dimensional velocity distribution over a flat plate. But the computation of the shear stress and friction coefficient from this velocity distribution requires the knowledge of the second derivative of u with respect to y which is difficult to obtain.
The Thwaites method is an alternative method for computing the friction coefficient, which avoids the computation of the second derivative of u with respect to y. This method involves the solution of an ordinary differential equation.
This method is particularly useful for computing the friction coefficient in the early stages of the boundary layer. The equations for the Thwaites method are as follows:
[tex]\frac{d^2\delta}{dx^2} =\frac{\delta}{u^2}\left(1+ \frac{\delta}{2}\frac{dU/dx}{U}\right)C_f[/tex]
= [tex]\frac{0.288\delta}{Re_x}(\frac{d\delta}{dx})^{1/2}Re_x[/tex]
= [tex]\frac{\rho u(x)x}{\mu}\tau_w[/tex]
= [tex]\rho u_\infty C_f/2x[/tex]
= [tex]\frac{1}{C_f}\int_{0}^{\delta}u_\infty \left(1- \frac{u}{u_\infty}\right)dy$$[/tex]
The following are the predictions using the Thwaites-Walz method to predict d, d*, 8, and
[tex]Cvs x.*d = 0.375 x^(1/5)*d*[/tex]
= [tex]4.91 x^(1/5)*8[/tex]
= [tex]0.664 x^(3/5)*Cv[/tex]
= [tex]1.328 x^(1/5)[/tex]
The Pohlhausen method is a simple method for computing the shear stress and the friction coefficient, which is based on an approximate solution of the boundary layer equations. The Pohlhausen method is based on the assumption that the velocity distribution is a parabolic function of the distance from the wall.
The equations for the Pohlhausen method are as follows:
[tex]u(x,y)= U(x)\left(1-\left(\frac{y}{\delta}\right)^2\right)\tau_w[/tex]
= [tex]\rho u_\infty \frac{dU}{dx}\frac{\delta^2}{3}C_f[/tex]
= [tex]\frac{2}{3}\frac{\tau_w}{\rho u_\infty^2}x[/tex]
= [tex]\frac{1}{C_f}\int_{0}^{\delta}u_\infty \left(1- \frac{u}{u_\infty}\right)dy$$[/tex]
The following are the predictions using the Pohlhausen method to predict d, d*, 8, and
Cvs x.• d = 0.37 x^(1/5)• d*
= 4.9 x^(1/5)• 8
= 0.664 x^(3/5)• Cv
= 1.328 x^(1/5)
The following are the exact solutions for flow over a flat plate. Equations (2.21) and (2.22) are for the shear stress and friction coefficient respectively.
[tex]$$ \tau_w = \rho u_\infty C_f/2[/tex]
= [tex]\frac{0.664 \rho u_\infty^2 x^{3/5}}{Re_x^{1/5}}C_f[/tex]
= [tex]\frac{0.664}{Re_x^{1/2}}[/tex]
The following are the predictions using the exact solutions for flow over a flat plate.
[tex]*d = 0.664 x^(3/10)*d*[/tex]
= [tex]4.91 x^(1/5)*8[/tex]
= [tex]0.664 x^(3/5)*Cv[/tex]
= [tex]1.328 x^(1/5)[/tex]
Hence, the predictions using the Thwaites-Walz method and the Pohlhausen method are very similar, but they differ significantly from the exact solution.
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A circle has a circumference of 20π meters. If a sector has a central angle of 45°, what is the arc length of the sector? Use pi = 3.14
The arc length of the sector is 7.85 meters whose circumference is 20π meters.
What is sector?In geometry, a sector is a part of a circle enclosed by two radii and an arc. The arc of a sector is a portion of the circumference of the circle. Sectors are often used in geometry and trigonometry to calculate areas, angles, and other measurements.
According to question:The equation for a circle's circumference is:
C = 2πr
Since we know the circumference of the circle, we can solve for the radius:
20π = 2πr
Dividing both sides by 2π, we get:
r = 10
Arc length = (central angle / 360°) x 2πr
where r is the radius and the central angle is in degrees.
Plugging in the given values, we get:
Arc length = (45° / 360°) x 2 x 3.14 x 10
Arc length = (1/8) x 62.8
Arc length = 7.85 meters
Therefore, the arc length of the sector is 7.85 meters.
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Sally has 3:4 as many beads as Kelly. Kelly has 18 more beads than Sally. Find the average number of beads the girl have
The average number of beads that the girls have is 63
Let's start by using algebra to represent the given information:
Let b be the number of beads that Sally has.
Then, Kelly has 3/4 times as many beads as Sally, which can be expressed as (3/4)b.
Also, we know that Kelly has 18 more beads than Sally, which can be expressed as (b + 18).
Putting these together, we can write the equation:
(3/4)b = b + 18
Solving for b, we get:
b = 72
So, Sally has 72 beads, and Kelly has (3/4) × 72 = 54 beads.
The average number of beads that the girls have is (72 + 54)/2 = 63 beads
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3x+4y=34 . In the equation, what is the y-value when x=10? x= 10 , y= ?
Answer:
y = 1
Step-by-step explanation:
3x + 4y = 34 x = 10
3(10) + 4y = 34
30 + 4y = 34
4y = 4
y = 1
So, the y-value is 1 when x = 10
[tex]\huge\text{Hey there!}[/tex]
[tex]\mathsf{3x + 4y = 34}[/tex]
[tex]\mathsf{3(10) + 4y = 34}[/tex]
[tex]\mathsf{30 + 4y = 34}[/tex]
[tex]\mathsf{4y + 30 = 34}[/tex]
[tex]\large\text{SUBTRACT 30 to BOTH SIDES}[/tex]
[tex]\mathsf{4y + 30 - 30 = 34 - 30}[/tex]
[tex]\large\text{SIMPLIFY IT!}[/tex]
[tex]\mathsf{4y = 34 - 30}[/tex]
[tex]\mathsf{4y = 4 }[/tex]
[tex]\large\text{DIVIDE 4 to BOTH SIDES}[/tex]
[tex]\mathsf{\dfrac{4y}{4} = \dfrac{4}{4}}[/tex]
[tex]\large\text{SIMPLIFY IT!}[/tex]
[tex]\mathsf{y = \dfrac{4}{4}}[/tex]
[tex]\mathsf{y = 1}[/tex]
[tex]\huge\text{Therefore your answer should most likely be:}[/tex]
[tex]\huge\boxed{\mathsf{y = 1}}\huge\checkmark[/tex]
[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]
Q.4. A shopkeeper bought 18 sets of kurthas at the rate of Rs.1000 each. If 3 sets of kurthas were damaged and the remaining sets of kurthas were sold at the rate of Rs. 1250. Find the profit or loss of the shopkeeper.
Answer:
Rs 750
Step-by-step explanation:
Given, No. of kurtas: 18, Each with CP = Rs 1000.
So, SP of 18 kurtas: 18*1000 = Rs. 18000
Also, 3 sets of kurtas were damaged.
Therefore, Remaining kurtas: 18-3 = 15. SP of each: Rs 1250.
SP of 15 kurtas: 15*1250 = Rs. 18750
So, Clearly SP>CP, Profit.
We know Profit= SP-CP
= 18750-18000 = Rs 750
Expand and simplify (3x - 1)(9x² + 3x + 1)
Simplify 4m^2n-7mn^2
Answer:
mn(4m - 7n)
Step-by-step explanation:
➠ 4m^2n-7mn^2
➠ 2^2 x m^2n - 7mn^2
➠ mn([tex](\frac{2^2*m^2n}{mn} -\frac{7mn^2}{mn} )[/tex]
➠ mn([tex]2^2*m^{2-1}-(7n^{2-1}))[/tex]
➠ mn(4m - 7n)
He scatter plot shows the number of flowers that have bloomed in the garden during the month of March:
A scatter plot with points showing an upward trend with points that are moderately spread out from a line of best fit. The y axis is labeled Number of Flowers and the x axis is labeled Days in March
Part A: Using computer software, a correlation coefficient of r = 0. 98 was calculated. Based on the scatter plot, is that an accurate value for this data? Why or why not? (5 points)
Part B: Instead of comparing the number of flowers and the day in March, write a scenario that would be a causal relationship for flowers in a garden. (5 points)
A) Based on the scatter plot, an r value of 0.98 seems to be a reasonable estimate of the correlation between the number of flowers and the days in March. The scatter plot shows an upward trend with points that are moderately spread out from a line of best fit.
B) A scenario that would be a causal relationship for flowers in a garden could be the amount of sunlight the garden receives.
A) Based on the scatter plot, an r value of 0.98 seems to be a reasonable estimate of the correlation between the number of flowers and the days in March. The scatter plot shows an upward trend with points that are moderately spread out from a line of best fit. This indicates that there is a strong positive relationship between the number of flowers and the days in March, which is reflected in the high correlation coefficient. Therefore, it is likely that the r value of 0.98 is an accurate value for this data.
B) A scenario that would be a causal relationship for flowers in a garden could be the amount of sunlight the garden receives. For example, if the garden receives more sunlight, it could cause the flowers to grow more quickly and bloom earlier in the month. On the other hand, if the garden receives less sunlight, the flowers may take longer to grow and bloom, and there may be fewer flowers overall. In this scenario, sunlight would be the independent variable, and the number of flowers bloomed would be the dependent variable.
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The given question is incomplete, the complete question is:
He scatter plot shows the number of flowers that have bloomed in the garden during the month of March:
A scatter plot with points showing an upward trend with points that are moderately spread out from a line of best fit. The y axis is labeled Number of Flowers and the x axis is labeled Days in March
Part A: Using computer software, a correlation coefficient of r = 0. 98 was calculated. Based on the scatter plot, is that an accurate value for this data? Why or why not? (5 points)
Part B: Instead of comparing the number of flowers and the day in March, write a scenario that would be a causal relationship for flowers in a garden. (5 points)
Good day.....Please urgent assistance needed
the initial speed with which the particle was projected is approximately 29.7 m/s.
How to solve?
We can solve this problem using the equations of motion for a particle moving under constant acceleration due to gravity.
Let v be the initial velocity with which the particle was projected, and let θ be the angle of projection with respect to the horizontal. Since the particle is launched from a height of 15m, its initial vertical velocity is v sin(θ), and its initial horizontal velocity is v cos(θ).
The time taken for the particle to hit the ground can be found by using the equation:
y = y0 + v0t + 1/2at²
where y is the vertical displacement, y0 is the initial vertical position, v0 is the initial vertical velocity, a is the acceleration due to gravity (-9.8 m/s²), and t is the time taken.
Since the particle starts and ends at the same vertical position (15m), we have:
y - y0 = 0
Substituting the values, we get:
0 = 15 + v sin(θ)t - 1/2(9.8)t²
Simplifying and rearranging, we get:
4.9t² - vt - 30 = 0
Using the quadratic formula, we get:
t = (v ±√(v² + 4(4.9)(30))) / (2(4.9))
Since we want the time taken for the particle to hit the ground, we take the positive root:
t = (v + √(v² + 588)) / 9.8
Now, we can use the horizontal displacement to find the initial speed v. Since the particle travels a horizontal distance of 30m in time t, we have:
x = v cos(θ) t
Substituting the values, we get:
30 = v cos(θ) [(v +√(v² + 588)) / 9.8]
Simplifying and rearranging, we get:
v² - 882 = 0
Using the quadratic formula again, we get:
v = ±√(882)
Since the initial velocity must be positive, we take the positive root:
v ≈ 29.7 m/s
Therefore, the initial speed with which the particle was projected is approximately 29.7 m/s.
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In tests of significance about an unknown parameter of some population, which of the following is considered strong evidence against the null hypothesis?
A. The value of an estimate of the unknown parameter based on a simple random sample from the population is not equal to zero.
B. The value of an estimate of the unknown parameter lies within 2 units of the sample value.
C. We observe a value of an estimate of the unknown parameter based on a simple random sample from the population that is very consistent with the null hypothesis
D. We observe a value of an estimate of the unknown parameter based on a simple random sample from the population that is very unlikely to occur if the null hypothesis is true.
In tests of significance about an unknown parameter of some population, "We observe a value of an estimate of the unknown parameter based on a simple random sample from the population that is very unlikely to occur if the null hypothesis is true" is considered strong evidence against the null hypothesis. The correct answer is Option (D).
We apply the principle of hypothesis testing to test a population's claims in inferential statistics. The null hypothesis (H₀) is always a statement about the population parameter that we believe to be true. However, we use the sample data to decide whether the null hypothesis is true or not. When we perform the hypothesis testing, we must consider the level of significance, the sample size, and the nature of the test.
The value of an estimate of the unknown parameter based on a simple random sample from the population that is very unlikely to occur if the null hypothesis is true is considered strong evidence against the null hypothesis. In other words, if the value of the test statistic is greater than the critical value, we can reject the null hypothesis. Consequently, we will have sufficient evidence to support the alternative hypothesis.
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Kayla earns $9 an hour regular pay as a hostess. For every hour over 40 hours she works each week, she earns 1.5 times her regular pay. If Kayla worked 47 hours last week. how much
money did she earn?