Answers
Answer:
Add a dot (Point A) 5 units to the left of point C, a dot (Point B) 7 units below point C, and a final dot (Point D) that is 5 units across from Point B
Step-by-step explanation:
Using the definition of a rectangle (4 right angles)
- Length is usually viewed as left to right
- Width is usually viewed as top to bottom
Related Questions
The quotient of a number and negative five increased by negative seven is three
Answers
The unknown number is -50.
How to find the unknown number?Let's start by translating the given statement into an equation.
"The quotient of a number and negative five" can be written as x/(-5), where x is the unknown number. "Increased by negative seven" means we add -7 to this expression. Finally, we are told that this expression is equal to three. Putting it all together, we get:
x/(-5) - 7 = 3
We can simplify this equation by adding 7 to both sides:
x/(-5) = 10
Multiplying both sides by -5, we get:
x = -50
So the unknown number is -50.
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The point (0, 2 3 , −2) is given in rectangular coordinates. Find spherical coordinates for this point. SOLUTION From the distance formula we have rho = x2 + y2 + z2 = 0 + 12 + 4 = and so these equations give the following. cos(φ) = z rho = φ = cos(theta) = x rho sin(φ) = theta = (Note that theta ≠ 3 2 because y = 2 2 > 0.) Therefore spherical coordinates of the given point are (rho, theta, φ) = . Change from rectangular to spherical coordinates. (Let rho ≥ 0, 0 ≤ theta ≤ 2, and 0 ≤ ϕ ≤ .) (a) (0, −6, 0) (rho, theta, ϕ) = (b) (−1, 1, − 2 ) (rho, theta, ϕ) =
Answers
(rho, θ, ϕ) = (sqrt(6), 3π/4 or 7π/4, arccos(-sqrt(2/3)) or 2π - arccos(-sqrt(2/3)) or π - arccos(-sqrt(2/3)) or π + arccos(-sqrt(2/3))).
(a) Rectangular coordinates are (0, -6, 0). From the distance formula, we have rho = sqrt(x^2 + y^2 + z^2) = sqrt(0^2 + (-6)^2 + 0^2) = 6.
Since x = rhosin(ϕ)cos(θ) and z = rhocos(ϕ), we have 0 = rhocos(ϕ) which implies ϕ = π/2. Also, -6 = rho*sin(ϕ)sin(θ), but sin(ϕ) = 1, so we have -6 = rhosin(θ) or sin(θ) = -6/6 = -1. Therefore, we have (rho, θ, ϕ) = (6, π, π/2).
(b) Rectangular coordinates are (-1, 1, -2). From the distance formula, we have rho = sqrt(x^2 + y^2 + z^2) = sqrt(1^2 + 1^2 + (-2)^2) = sqrt(6).
Since x = rho*sin(ϕ)cos(θ), y = rhosin(ϕ)sin(θ), and z = rhocos(ϕ), we have:
-1 = sqrt(6)*sin(ϕ)*cos(θ)
1 = sqrt(6)*sin(ϕ)*sin(θ)
-2 = sqrt(6)*cos(ϕ)
From the first two equations, we have:
tan(θ) = 1/-1 = -1
Therefore, θ = 3π/4 or 7π/4.
From the third equation, we have:
cos(ϕ) = -2/sqrt(6) = -sqrt(2/3)
Therefore, ϕ = arccos(-sqrt(2/3)).
Finally, from the first equation, we have:
sin(ϕ)*cos(θ) = -1/sqrt(6)
Therefore, sin(ϕ) = -1/(sqrt(6)*cos(θ)) and we can compute ϕ using arccos(-sqrt(2/3)) and arccos(cos(θ)):
If θ = 3π/4, then cos(θ) = -1/sqrt(2), and sin(ϕ) = -sqrt(3/2). Thus, ϕ = arccos(-sqrt(2/3)) or ϕ = 2π - arccos(-sqrt(2/3)).
If θ = 7π/4, then cos(θ) = -1/sqrt(2), and sin(ϕ) = sqrt(3/2). Thus, ϕ = π - arccos(-sqrt(2/3)) or ϕ = π + arccos(-sqrt(2/3)).
Therefore, the spherical coordinates of the point (-1, 1, -2) are:
(rho, θ, ϕ) = (sqrt(6), 3π/4 or 7π/4, arccos(-sqrt(2/3)) or 2π - arccos(-sqrt(2/3)) or π - arccos(-sqrt(2/3)) or π + arccos(-sqrt(2/3))).
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Hello anyone that can help me with these please
Answers
Answer:
13 (x= -2, y= 1)
14 (x=3, y= -4)
Step-by-step explanation:
1 x+5y=3
3x-2y=-8
u gonna add 3 into x and make it negative
2 -3x-15y=-9
3x-2y=-8
x will be gone since 3x-3x
3 -17y=-17
y= 1
going to add y into x+5y=3
x+5=3
x=-2
question 14
y=2x-10
y=-4x+8
add - to everything in the bottom
y=2x-10
-y=4x-8
0=6x-18
18=6x
3=x
add 3 into x in y=2x-10
y=6-10
y=-4
I need answer ASAP
Thanks if you help!!
Find the circumference of the circle
Answers
C=2*3.142*14
C=87.976m
a) If x^3+y^3−xy^2=5 , find dy/dx.b) Find all points on this curve where the tangent line is horizontal and where the tangent line is vertical.
Answers
To find where the tangent line is horizontal, we set [tex]\frac{Dx}{Dy}[/tex] = 0 and solve for x and y. To find where the tangent line is vertical. The correct answer is These are the points where the tangent line is vertical.
We set the derivative undefined, and solve for x and y.
a) To find [tex]\frac{Dx}{Dy}[/tex], we first differentiate the equation with respect to x:
[tex]3x^2 + 3y^2(dy/dx) - y^2 - 2xy(dy/dx)[/tex][tex]= 0[/tex]
Simplifying and solving for [tex]\frac{Dx}{Dy}[/tex], we get:
[tex]\frac{Dx}{Dy}[/tex] =[tex](y^2 - 3x^2) / (3y^2 - x^2)[/tex]
b) To find where the tangent line is horizontal, we need to find where [tex]\frac{Dx}{Dy}[/tex]=[tex]0[/tex]. Using the equation we found in part a:
[tex](y^2 - 3x^2) / (3y^2 - x^2)[/tex][tex]= 0[/tex]
This occurs when [tex]y^2 = 3x^2.[/tex] Substituting this into the original equation, we get:[tex]x^3 + 3x^2y - xy^2 = 5[/tex]
Solving for y, we get two solutions: [tex]y = x*\sqrt{3}[/tex]
These are the points where the tangent line is horizontal. To find where the tangent line is vertical, we need to find where the derivative is undefined. Using the equation we found in part a:[tex]3y^2 - x^2 = 0[/tex]
This occurs when [tex]y = +/- x*sqrt(3)/3.[/tex] Substituting this into the original equation, we get: [tex]x^3 + 2x^5/27 = 5[/tex]
Solving for x, we get two solutions: [tex]x = -1.554, 1.224[/tex]
Substituting these values back into the equation for y, we get the corresponding y values:[tex]y = -1.345, 1.062[/tex]
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There are 54 green chairs and 36 red chairs in an auditorium.
There are 9 rows of chairs. Each row has the same number of
green chairs and red chairs.
Explain how the number of green chairs and red chairs in
each row can be used to write an expression that shows
the total number of chairs in the auditorium.
Use the drop-down menus to complete the explanation.
To determine the number of green chairs and red chairs in each
row, Choose... 54 and 36 by 9.
The total number of chairs can be expressed as the product of
9 and the Choose... of the green chairs and red chairs in
each row. This is represented by the expression
Choose...
Answers
To determine the number of green chairs and red chairs in each row, divide 54 and 36 by 9.
The total number of chairs can be expressed as the product of
9 and the 6 of the green chairs and 4 red chairs in each row.
This is represented by the expression 9(6 + 4)
How to write equivalent expression?Number of green chairs = 54
Number of red chairs = 36
Number of rows of chairs = 9
Number of green chairs in each row = 54/9
= 6
Number of red chairs in each row = 36/9
= 4
Ultimately, the expression can be written as 9(6 + 4)
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calculus grades (1.6) the dotplot shows final exam scores for mr. miller’s 25 calculus students. a. find the median exam score.b. Without doing any calculations, would you estimate that the mean is about the same as the median, higher than the median, or lower than the median?
Answers
a. To find the median exam score, we need to arrange the scores in order from least to greatest. Then we find the middle score. In this case, the dotplot is not available, so I cannot provide the exact median score. However, once the scores are arranged in order, we can identify the middle score as the median.
b. Without doing any calculations, it is difficult to estimate whether the mean is about the same as the median, higher than the median, or lower than the median. However, if the distribution is roughly symmetric, we can expect the mean to be about the same as the median. If the distribution is skewed, then the mean will be pulled towards the tail of the distribution, and may be higher or lower than the median depending on the direction of the skew. Without additional information about the shape of the distribution, it is difficult to make an accurate estimate.
a. To find the median exam score, follow these steps:
1. Arrange the final exam scores from the dot plot in ascending order.
2. Since there are 25 students (an odd number), the median is the middle value. It is the 13th value in the ordered list.
b. Without doing any calculations, we can estimate if the mean is about the same as the median, higher, or lower based on the distribution of the scores. If the dot plot shows a symmetric distribution, the mean and median would be approximately equal. If the distribution is skewed to the right (with a few high scores pulling the average up), the mean would be higher than the median. If the distribution is skewed to the left (with a few low scores pulling the average down), the mean would be lower than the median. if the distribution is roughly symmetric, we can expect the mean to be about the same as the median.
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Question 6 of 9
Jennifer spent $10.25 on supplies to make lemonade. At least how many glasses of lemonade must she sell
at $0.45 per glass to make a profit?
At most 4.61 glasses
At least 5 glasses
At least 23 glasses
O At most 22.78 glasses
Answers
Cost per glass = Total cost / Number of glasses
Cost per glass = $10.25 / x (where x is the number of glasses)
To make a profit, Jennifer needs to sell each glass for more than the cost per glass. If she sells each glass for $0.45, then her revenue for x glasses would be:
Revenue = Price per glass x Number of glasses
Revenue = $0.45 x
For Jennifer to make a profit, her revenue must be greater than her cost:
Revenue > Cost
$0.45 x > $10.25 / x
Multiplying both sides by x, we get:
$0.45 x^2 > $10.25
Dividing both sides by $0.45, we get:
x^2 > 22.78
Taking the square root of both sides, we get:
x > 4.77
Since Jennifer cannot sell a fraction of a glass, the smallest number of glasses she needs to sell to make a profit is 5. Therefore, the answer is At least 5 glasses.
what is the length of a one-dimensional box in which an electron in the n=1n=1 state has the same energy as a photon with a wavelength of 400 nmnm ?
Answers
The energy of an electron in a one-dimensional box can be calculated using the formula: E = (n^2 * h^2) / (8 * m * L^2)
where n is the principal quantum number, h is Planck's constant, m is the electron's mass, and L is the length of the box.
The energy of a photon can be calculated using the formula:
E = (h * c) / λ
where c is the speed of light, and λ is the wavelength of the photon.
Given that the energy of the electron and the photon are equal, we can equate the two formulas:
(n^2 * h^2) / (8 * m * L^2) = (h * c) / λ
For n = 1 and λ = 400 nm:
(1^2 * h^2) / (8 * m * L^2) = (h * c) / (400 * 10^-9 m)
Solving for L, we get:
L^2 = (h^2) / (8 * m * (h * c) / (400 * 10^-9 m))
L^2 = (h * 400 * 10^-9 m) / (8 * m * c)
L = √((h * 400 * 10^-9 m) / (8 * m * c))
Plug in the values for h (6.626 * 10^-34 Js), m (9.109 * 10^-31 kg), and c (2.998 * 10^8 m/s):
L ≈ 2.09 * 10^-10 m
Therefore, the length of the one-dimensional box is approximately 2.09 * 10^-10 meters.
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the temperature of points on an elliptical plate x2+y2+xy≤4 is given by the equation t(x,y)=16x2+y2. find the hottest and coldest temperatures on the edge of the elliptical plate.
Answers
The hottest temperature on the edge of the elliptical plate is 32 and the coldest temperature is 8.
How to find the hottest and coldest temperatures on the edge of the elliptical plate?The edge of the elliptical plate is given by the equation [tex]x^2 + xy + y^2 = 4.[/tex]
To find the hottest and coldest temperatures on this edge, we need to find the maximum and minimum values of the function t(x,y) subject to this constraint.
One way to solve this problem is to use Lagrange multipliers. Let's define a new function F(x,y,λ) as follows:
[tex]F(x,y,\lambda) = 16x^2 + y^2 + \lambda(x^2 + xy + y^2 - 4)[/tex]
The critical points of F(x,y,λ) occur when the partial derivatives with respect to x, y, and λ are all equal to zero:
∂F/∂x = 32x + 2λx + λy = 0
∂F/∂y = 2y + 2λy + λx = 0
∂F/∂λ =[tex]x^2 + xy + y^2 - 4[/tex]= 0
Solving these equations simultaneously, we get:
[tex]x = \pm \sqrt(2), y = \pm \sqrt(2)[/tex], λ = 8/3
The function t(x,y) takes on its maximum value of 32 at the points [tex](\sqrt(2), \sqrt(2))[/tex] and [tex](-\sqrt(2), -\sqrt(2))[/tex] and its minimum value of 8 at the points [tex](\sqrt(2), -\sqrt(2))[/tex] and [tex](-\sqrt(2), \sqrt(2)).[/tex]
Therefore, the hottest temperature on the edge of the elliptical plate is 32 and the coldest temperature is 8.
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How many fewer minutes did Lizzie practice on Tuesday than on Monday?
Answers
The steps to use to solve the problem are:
Step 1: Understand the problemStep 2: Plan a solutionStep 3: Solve the problemStep 4: Look at the answerStep 5: share the answerLizzie had practiced 15 fewer minutes on Tuesday than on Monday.
What is the time about?Note that from the question:
T = Tuesday
M = Monday
So T = M - 15,
70 = M - 15
Hence M = 85 minutes.
B. If Lizzie were to worked out for 85 minutes on Monday as well as 70 minutes on Tuesday, so she practiced:
85 - 70
= 15
So Lizzie had practiced 15 fewer minutes on Tuesday than that of Monday.
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See full question below
Assessment items Lizzie works out 15 fewer minutes on Tuesday than on Monday. She worked out 70 minutes on Tuesday. Use the five-step problem-solving plan. How many minutes did she work out on Monday?How many fewer minutes did Lizzie practice on Tuesday than on Monday?
two roots of a cubic auxiliary equation are r1 = 2i and r2 = 5. what is a corresponding homogeneous differential equation with constant coefficients?
Answers
The corresponding homogeneous differential equation with constant coefficients is y''' - (4i + 5)y'' + 20iy' - 20y = 0, where y is the dependent variable and i is the imaginary unit.
Given that the roots of the cubic auxiliary equation are r₁ = 2i and r₂ = 5, we can write the equation as
(x - 2i)(x - 2i)(x - 5) = 0
Expanding this equation, we get
(x² - 4ix + 4)(x - 5) = 0
Simplifying further, we get
x³ - (4i + 5)x² + 20ix - 20 = 0
Therefore, the corresponding homogeneous differential equation with constant coefficients is
y''' - (4i + 5)y'' + 20iy' - 20y = 0
where y is the dependent variable and i is the imaginary unit.
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Six points have these coordinates 1 2 4 6 5.6 5.6 4.7 4.5 3.8 3.1 2.8 Portions of the MINITAB printout are shown here The regression equation is y = 6.03-0.557 x Predictor Coef 6.0333 -0.55714 SE Coef 0.1587 0.04074 38.03 -13.68 0.001 0.003 Constant Predicted Values for New Observations New Obs 1 MINITAB Output 5.1762) 2.1206) Fit 95.0% PI SE Fit 4.9190 0.0926 1.5762 0.1961 95.0% c (4.6619, (1.0317, (4.3805, (0.8548 5.4576) 2.2975) X denotes a point that is an outlier in the predictors. Values of Predictors for New Observations New Obs 1 2.00 8.00(a) Find a 95% confidence interval for the average value of y when x = 2. (Enter your answers to four decimal places.)
(b) Find a 95% prediction interval for some value of y to be observed in the future when x = 2. (Enter your answers to four decimal places.)
Answers
A. the 95% confidence interval for the average value of y when x = 2 is (4.9241, 5.4283).
B. The 95% prediction interval for some value of y to be observed in the future when x = 2 is (4.6619, 5.4576).
(a) To find a 95% confidence interval for the average value of y when x = 2, use the provided information:
Predicted Value for New Obs 1 (x = 2): 5.1762
SE Fit: 0.0926
Now, apply the formula for confidence intervals:
CI = Predicted Value ± (t-value * SE Fit)
For a 95% confidence interval and degrees of freedom = 4 (6 points - 2 parameters), the t-value is approximately 2.776 (using a t-table).
CI = 5.1762 ± (2.776 * 0.0926)
CI = (5.1762 - (2.776 * 0.0926), 5.1762 + (2.776 * 0.0926))
CI = (4.9241, 5.4283)
So, the 95% confidence interval for the average value of y when x = 2 is (4.9241, 5.4283).
(b) To find a 95% prediction interval for some value of y to be observed in the future when x = 2, use the information provided:
95.0% PI: (4.6619, 5.4576)
The 95% prediction interval for some value of y to be observed in the future when x = 2 is (4.6619, 5.4576).
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The equation of the line tangent to the differentiable and invertible function f(x) at the point (-1,3) is given by y = –2x + 1. Find the equation of the tangent line to f-1(x) at the point (3, -1).
Answers
The equation of the tangent line to f-1(x) at the point (3, -1) is y = 1/(-2) x - 1/2.
This is because the slope of the tangent line to f(x) at (-1,3) is -2, and since f(x) and f-1(x) are inverse functions, the slopes of their tangent lines are reciprocals.
Therefore, the slope of the tangent line to f-1(x) at (3,-1) is -1/2. To find the y-intercept, we can use the fact that the point (3,-1) is on the tangent line. Plugging in x=3 and y=-1 into the equation y = -1/2 x + b, we get b = 1/2. Therefore, the equation of the tangent line to f-1(x) at (3,-1) is y = 1/(-2) x - 1/2.
In summary, to find the equation of the tangent line to f-1(x) at a point (a,b), we first find the point (c,d) on the graph of f(x) that corresponds to (a,b) under the inverse function.
Then, we find the slope of the tangent line to f(x) at (c,d), take the reciprocal, and plug it into the point-slope formula to find the equation of the tangent line to f-1(x) at (a,b).
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A baseball team received a discount on each hat purchase. the team buys 14 hats total for a total of 14(d-3) dollars. how much does the team pay for each hat
Answers
The team pays d - 3 dollars for each hat after the discount.
What is Cost?Cost is the amount of money required to purchase or produce a particular item or service. It is often represented by the symbol "C" in mathematical equations.
According to the given information:
Let's start by breaking down the given information:
The team buys 14 hats in total.
The total cost for the 14 hats is 14(d-3) dollars.
The team received a discount on each hat purchase.
To find the cost of each hat, we need to divide the total cost by the number of hats:
cost per hat = total cost / number of hats
Plugging in the given values, we get:
cost per hat = 14(d-3) / 14
Simplifying the expression by canceling out the common factor of 14, we get:
cost per hat = d - 3
Therefore, the team pays d - 3 dollars for each hat after the discount.
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what is x in this equation? 5^2x -3 = 622
Answers
hope that helps. went ahead and did the solution so you could see the steps
the z value that leaves area 0.1056 in the right tail is...
Answers
The z value that leaves area 0.1056 in the right tail is approximately 1.26.
The z value that leaves an area of 0.1056 in the right tail is found by using the standard normal distribution table or a z-score calculator.
Here's how to find it:
1. Since the area to the right of the z value is 0.1056, the area to the left will be 1 - 0.1056 = 0.8944.
2. Look up the corresponding z value for the area 0.8944 in a standard normal distribution table or use a z-score calculator.
3. Find the z value associated with this area.
After performing these steps, you will find that the z value that leaves an area of 0.1056 in the right tail is approximately 1.26.
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Given that A is the matrix 2 4 -7 -4 7 3 -1 -5 -1 The cofactor expansion of the determinant of A along column 1 is: det(A) = a1 · A1| + a2 · |A2|+ a3 · |A3), where a1 = __ a2 = ___ a3 = __ A1 =
Answers
A2 is the matrix -4 3 -1 -1, a2 is -4. A3 is the matrix 7 -4 -1 -5, a3 is -1. Therefore, the answer is: a1 = 2, a2 = -4, a3 = -1, A1 = 7 3 -5 -1.
Given that A is the matrix:
| 2 4 -7 |
| -4 7 3 |
| -1 -5 -1 |
The cofactor expansion of the determinant of A along column 1 is: det(A) = a1 · |A1| + a2 · |A2|+ a3 · |A3|
Here, a1, a2, and a3 are the elements of the first column of the matrix A:
a1 = 2
a2 = -4
a3 = -1
To find the matrices A1, A2, and A3, we need to remove the corresponding row and column of each element:
A1 is obtained by removing the first row and first column:
| 7 3 |
|-5 -1 |
A2 is obtained by removing the second row and first column:
| 4 -7 |
|-5 -1 |
A3 is obtained by removing the third row and first column:
| 4 -7 |
| 7 3 |
So, the cofactor expansion of the determinant of A along column 1 is:
det(A) = 2 · |A1| - 4 · |A2| - 1 · |A3|
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Dustin skis on a circular ski trail that has a radius of 2.42 km. Imagine an angle with a vertex at the center of the circular trail that subtends the path Dustin skis.
a. If Dustin travels 0.96 km counter-clockwise along the ski trail, what is the angle's measure in radians? __ radians b. If the angle measures 3 radians, how far did Dustinski? __ km
Answers
a) The angle's measure in radians is 0.397 radians.
b)Dustin skis 7.26 km if the angle measures 3 radians.
a. To find the angle's measure in radians:
We need to use the formula:
θ = s/r
where θ is the angle in radians, s is the length of the arc, and r is the radius of the circle.
In this case, Dustin travels 0.96 km along the ski trail, which is the length of the arc. The radius of the circle is 2.42 km. So we have:
θ = 0.96/2.42 = 0.397 radians (rounded to three decimal places)
Therefore, the angle's measure in radians is 0.397 radians.
b. To find how far Dustin skis if the angle measures 3 radians:
We can use the same formula and rearrange it to solve for s:
s = θr
In this case, θ is 3 radians and r is still 2.42 km. So we have:
s = 3 x 2.42 = 7.26 km
Therefore, Dustin skis 7.26 km if the angle measures 3 radians.
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Find the global maximizers and minimizers (if they exist) for the following functions and the constraint sets. Show your working clearly. (i) f(x) = 4x²+1/4x, S=[1/√5,[infinity]] (2 marks) ii) f(x) = x^5 – 8x^3, S =[1,2] (2 marks)
Answers
Therefore, the global minimum of f(x) on S is at [tex]x = 1/\sqrt{5[/tex]and the global maximum does not exist. And the global minimum of f(x) on S is at x = 2 and the global maximum is at x = 1.
What is function?A function is a relationship between a set of inputs (called the domain) and a set of outputs (called the range) with the property that each input is associated with exactly one output. In other words, a function maps each element in the domain to a unique element in the range.
Functions are commonly denoted by a symbol such as f(x), where x is an element of the domain and f(x) is the corresponding output value. The domain and range of a function can be specified explicitly or can be determined by the context in which the function is used.
(i) To find the global maximizers and minimizers of the function f(x) = 4x²+1/4x on the interval S=[1/√5,[infinity]], we first need to find the critical points of f(x) within S.
Taking the derivative of f(x) with respect to x, we get:
f'(x) = 8x - 1/4x²
Setting f'(x) = 0 to find critical points, we get:
8x - 1/4x² = 0
Multiplying both sides by 4x², we get:
32x³ - 1 = 0
Solving for x, we get:
x = 1/∛32 = 1/2∛2
Note that this critical point is not in the interval S, so we need to check the endpoints of S as well as any vertical asymptotes of f(x).
At x = 1/√5, we have:
f(1/√5) = 4(1/5) + 1/(4(1/√5)) = 4/5 + √5/4
At x → ∞, we have:
Lim x→∞ f(x) = ∞
Therefore, the global minimum of f(x) on S is at [tex]x = 1/\sqrt5[/tex] and the global maximum does not exist.
(ii) To find the global maximizers and minimizers of the function[tex]f(x) = x^5 - 8x^3[/tex] on the interval S=[1,2], we first need to find the critical points of f(x) within S.
Taking the derivative of f(x) with respect to x, we get:
[tex]f'(x) = 5x^4 - 24x^2[/tex]
Setting f'(x) = 0 to find critical points, we get:
[tex]5x^4 - 24x^2 = 0[/tex]
Factoring out [tex]x^2[/tex], we get:
[tex]x^2(5x^2 - 24) = 0[/tex]
Solving for x, we get:
[tex]x = 0 or x =±\sqrt(24/5)[/tex]
Note that none of these critical points are in the interval S, so we need to check the endpoints of S.
At x = 1, we have:
[tex]f(1) = 1 - 8 = -7[/tex]
At x = 2, we have:
[tex]f(2) = 32 - 64 = -32[/tex]
Therefore, the global minimum of f(x) on S is at x = 2 and the global maximum is at x = 1.
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Consider the following recursive definition of the Lucas numbers L(n): L(n) = 1 if n=1 3 if n=2 L(n-1)+L(n-2) if n > 2 What is L(4)? Your Answer:
Answers
The value of Lucas number L(4) is 4.
To find L(4) using the recursive definition of Lucas numbers, we'll follow these steps:
1. L(n) = 1 if n = 1
2. L(n) = 3 if n = 2
3. L(n) = L(n-1) + L(n-2) if n > 2
Since we want to find L(4), we need to first find L(3) using the recursive formula:
L(3) = L(2) + L(1)
L(3) = 3 (from step 2) + 1 (from step 1)
L(3) = 4
Now we can find L(4):
L(4) = L(3) + L(2)
L(4) = 4 (from L(3) calculation) + 3 (from step 2)
L(4) = 7
So, the value of L(4) in the Lucas numbers is 7.
Explanation;-
STEP 1:- First we the recursive relation of the Lucas number, In order to find the value of the L(4) we must know the value of the L(3) and L(2)
STEP 2:- Value of the L(2) is given in question, and we find the value of L(3) by the recursion formula.
STEP 3:-when we get the value of L(3) and L(2) substitute this value in L(4) = L(3) + L(2) to get the value of L(4).
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Solve the following systems of five linear equation both with inverse and left division methods 2.5a-b+3e+1.5d-2e = 57.1 3a+4b-2c+2.5d-e=27.6 -4a+3b+c-6d+2e=-81.2 2a+3b+c-2.5d+4e=-22.2 a+2b+5c-3d+4e=-12.2
Answers
The solution for the given system of linear equations is a ≈ -1.13, b ≈ -4.01, c ≈ 2.75, d ≈ 9.22, and e ≈ -6.09.
1. Write the given equations in matrix form (A * X = B), where A is the matrix of coefficients, X is the matrix of variables (a, b, c, d, e), and B is the matrix of constants (57.1, 27.6, -81.2, -22.2, -12.2).
2. To solve using inverse method, first, find the inverse of matrix A (A_inv). Use any tool or method for matrix inversion, such as Gaussian elimination or Cramer's rule.
3. Multiply A_inv with matrix B (A_inv * B) to obtain the matrix X, which contains the solutions for a, b, c, d, and e.
4. For the left division method, you can use MATLAB or Octave software. Use the command "X = A \ B" to obtain the matrix X, which contains the solutions for a, b, c, d, and e.
After performing the calculations, the approximate solutions are a ≈ -1.13, b ≈ -4.01, c ≈ 2.75, d ≈ 9.22, and e ≈ -6.09.
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Let X and Y be two independent Bernoulli(0.5) random variables.
Define U = X + Y and V = X - Y.
a. Find the joint and marginal probability mass functions for U and V.
b. Are U and V independent?
Do not use Jacobean transformation to solve this question
Answers
a. The marginal PMFs of U and V can be obtained by summing over all possible values of the other random variables: P(U = u):[tex]= sum_{v=-u}^{u} P(U = u, V = v), P(V = v) \\\\= sum_{u=|v|}^{2-|v|} P(U = u, V = v).[/tex]
and b. P(V = -1) = P(X = 1, Y.
a. The joint probability mass function (PMF) of U and V, we can use the definition of U and V and the fact that X and Y are independent Bernoulli(0.5) random variables:
For U = X + Y and V = X - Y, we have:
U = 0 if X = 0 and Y = 0
U = 1 if (X = 0 and Y = 1) or (X = 1 and Y = 0)
U = 2 if X = 1 and Y = 1
V = 0 if X = 0 and Y = 0
V = 1 if (X = 0 and Y = 1) or (X = 1 and Y = 0)
V = -1 if X = 1 and Y = 1
Using the above equations, we can write the joint PMF of U and V as:
P(U = u, V = v) = P(X = (u+v)/2, Y = (u-v)/2)
Since X and Y are independent Bernoulli(0.5) random variables, we have:
P(X = x, Y = y) = P(X = x) * P(Y = y) = 0.5 * 0.5 = 0.25
Therefore, we can write the joint PMF of U and V as:
P(U = u, V = v) =
{ 0.25 if u+v is even and u-v is even, and u+v >= 0
{ 0 otherwise
The marginal PMFs of U and V can be obtained by summing over all possible values of the other variable:
[tex]P(U = u) = sum_{v=-u}^{u} P(U = u, V = v)\\P(V = v) = sum_{u=|v|}^{2-|v|} P(U = u, V = v)[/tex]
b. To check if U and V are independent, we need to show that their joint PMF factorizes into the product of their marginal PMFs:
P(U = u, V = v) = P(U = u) * P(V = v) for all u and v
Let's consider the case where u+v is even and u-v is even:
P(U = u, V = v) = 0.25
P(U = u) * P(V = v) =
[tex]sum_{v'=-u}^{u} P(U = u) * P(V = v') * delta_{v,v'}[/tex]
= P(U = u) * P(V = v) + P(U = u) * P(V = -v) if u > 0
= P(U = u) * P(V = 0) if u = 0
delta_{v,v'} is the Kronecker delta function that equals 1 if v = v' and 0 otherwise.
Therefore, U and V are independent if and only if P(U = u) * P(V = v) = P(U = u, V = v) for all u and v.
Now let's compute the marginal PMFs of U and V:
P(U = 0) = P(X = 0, Y = 0) = 0.25
P(U = 1) = P(X = 0, Y = 1) + P(X = 1, Y = 0) = 0.5
P(U = 2) = P(X = 1, Y = 1) = 0.25
P(V = -1) = P(X = 1, Y
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Find the Taylor polynomials P1, ..., P4 centered at a = 0 for f(x) = cos( - 5x).
Answers
The Taylor polynomials P1, P2, P3, and P4 for f(x) = cos(-5x) centered at a = 0 are given by:
P1(x) = 1
P2(x) = 1 + (-5x)²/2!
P3(x) = 1 - 25x²/2! + (-5x)⁴/4!
P4(x) = 1 - 25x²/2! + 625x⁴/4! - (-5x)⁶/6!
To find the Taylor polynomials centered at a = 0 for f(x) = cos(-5x), follow these steps:
1. Calculate the derivatives of f(x) up to the fourth derivative.
2. Evaluate each derivative at a = 0.
3. Use the Taylor polynomial formula to calculate P1, P2, P3, and P4.
4. Simplify the expressions for each polynomial.
Remember that the Taylor polynomial formula is given by:
Pn(x) = f(a) + f'(a)(x-a) + f''(a)(x-a)²/2! + ... + fⁿ(a)(x-a)ⁿ/n!
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Suppose you are in Watson Lake, Yukon. For a Notebook computer: Regular price $1598,
now 20% off
a) Calculate the discount.
b) Calculate the sale price, before taxes.
c) Calculate the sale price, including taxes. (GST 5% only)
Answers
Answer:
Step-by-step explanation:
a) The discount is 20% of the regular price, which is:
Discount = 20% x $1598 = $319.60
b) The sale price before taxes can be calculated by subtracting the discount from the regular price:
Sale price before taxes = Regular price - Discount
Sale price before taxes = $1598 - $319.60
Sale price before taxes = $1278.40
c) To calculate the sale price including taxes, we need to add the GST of 5% to the sale price before taxes:
Sale price including taxes = Sale price before taxes + (GST x Sale price before taxes)
Sale price including taxes = $1278.40 + (0.05 x $1278.40)
Sale price including taxes = $1278.40 + $63.92
Sale price including taxes = $1342.32
Therefore, the sale price including taxes is $1342.32.
A researcher studied the relationship between the number of times a certain species of cricket will chirp in one minute and the temperature outside. Her data is expressed in the scatter plot and line of best fit below. Based on the line of best fit, what temperature would it most likely be outside if this same species of cricket were measured to chirp 120 times in one minute?
Answers
The expected change in temperature in degree Fahrenheit for each additional cricket chirp in one minute.
Given the relationship between the number of times a certain species of cricket will chirp in one minute and the temperature outside.
Here, we see that the best fit is a linear regression.
On the y- axis temperature in degree Fahrenheit is labeled and on the x axis chirps per minute is labelled.
Since, the slope = Rate of change of y/ Rate of change of x
So, the slope of line represents the expected change in temperature in degree Fahrenheit for each additional cricket chirp in one minute.
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Help me with this question Please
Answers
Step-by-step explanation:
line MO,line NO, line
MN
1000 people were asked their preferred method of exercise. The following table shows the results grouped by age.
18-22 23-27 28-32 33-37 total
Run 54 40 42 66 202
Bike 77 68 90 70 305
Swim 28 43 50 52 173
Other 90 78 71 81 320
Total 249 229 253 269 1000
You meet 25 yo who too the survey. What is the proba the she prefers biking?
please express your answer in the form of a fraction
Answers
The probability that a 25-year-old person from this group prefers biking is: 68/229.
How to determine the probability that a 25-year-old person from this group prefers bikingThe total number of people in the survey between the ages of 23 and 27 is 229. The number of people who prefer biking in this group is 68.
Therefore, the probability that a 25-year-old person from this group prefers biking is: 68/229
To simplify the fraction, we can divide both the numerator and denominator by their greatest common factor (GCF), which is 1:
68/229 = 68/229
So the probability that a 25-year-old person from this group prefers biking is 68/229.
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Find the volume of the cube.
Answers
Answer:
0.064 mi³
Step-by-step explanation:
Volume of cube = s³
S = 2/5 mi
Let's solve
(2/5)³ = 0.064 mi³
So, the volume of the cube is 0.064 mi³
Evaluate using direct substitution.
Answers
Answer:
Step-by-step explanation:
f(-1) = 14