The parametric representation of the surface is : x = u, y = [(10 - 6u) ± √(409 - 14u + 9u²)]/41, z = (5 - 3u - 2y)/6
Given, the plane 3x + 2y + 6z = 5 and the cylinder x² + y² = 81
To find the parametric representation of the surface consisting of the portion of the plane contained within the cylinder, we can use the following steps
Step 1: Solving for z in the equation of the plane
3x + 2y + 6z = 5
⇒ z = (5 - 3x - 2y)/6
Step 2: Substituting this value of z into the equation of thex² + y² = 81 gives us
x² + y² = 81 - [(5 - 3x - 2y)/6]²
Multiplying both sides by 36, we get cylinder
36x² + 36y² = 2916 - (5 - 3x - 2y)²
Simplifying, we get
36x² + 36y² = 2916 - 25 + 30x + 20y - 9x² - 12xy - 4y²
Simplifying further, we get
45x² + 12xy + 41y² - 30x - 20y + 289 = 0
This is a linear equation in x and y.
Therefore, we can solve for one variable in terms of the other variable. We will solve for y in terms of x as it seems easier in this case.
Step 3: Solving the linear equation for y in terms of x
45x² + 12xy + 41y² - 30x - 20y + 289 = 0
⇒ 41y² + (12x - 20)y + (45x² - 30x + 289) = 0
Using the quadratic formula, we get
y = [-(12x - 20) ± √((12x - 20)² - 4(41)(45x² - 30x + 289))]/(2·41)
Simplifying, we get
y = [(10 - 6x) ± √(409 - 14x + 9x²)]/41
Therefore, the parametric representation of the surface is
x = u,
y = [(10 - 6u) ± √(409 - 14u + 9u²)]/41,
z = (5 - 3u - 2y)/6
where -9 ≤ u ≤ 9 and 9/5 ≤ y ≤ 41/5.
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Simplify the equation
-1/9(5g-3)2/9g
PLEASE SHOW WORK
Answer:
= −10/81g^2+2/27g
Step-by-step explanation:
---------------
Charge Q
1. =6.0nC is at (0.30 m,0), charge Q
2 =−1.0nC is at (0,0.10 m), and charge Q
3 =5.0nC is at (0,0). What is the magnitude of the net electrostatic force on the 5.0−nC charge due to the other charges? (k=8.99×10^9 N⋅m^2C ^2 )
The magnitude of the net electrostatic force on the 5.0−nC charge due to the other charges when the charge Q1 = 6.0 nC is at (0.30 m, 0), charge Q2 = −1.0 nC is at (0, 0.10 m), and charge Q3 = 5.0 nC is at (0, 0) is 6.21 N.
The value of the net electrostatic force on the 5.0-nC
charge due to the other charges when the charge Q1 = 6.0 nC is at (0.30 m, 0),
charge Q2 = −1.0 nC is at (0, 0.10 m), and
charge Q3 = 5.0 nC is at (0, 0) can be calculated as follows:
Given data,Charge Q1 = 6.0 nC is at (0.30 m, 0),
Charge Q2 = -1.0 nC is at (0, 0.10 m),
Charge Q3 = 5.0 nC is at (0, 0)
The formula to find out the force on the third charge Q3 is:
F = k * |Q1 * Q3| / r1^2 + k * |Q2 * Q3| / r2^2
Here, k = 8.99 × 10^9 N·m^2/C^2, Q1 = 6.0 nC, Q2 = -1.0 nC, Q3 = 5.0 nC
For the third charge Q3, the distance from Q1 is:
r1 = √(0.3^2 + 0^2) = 0.3 m
And the distance from Q2 is: r2 = √(0^2 + 0.1^2) = 0.1 m
Substituting all the given values in the formula:
F = 8.99 × 10^9 * [ (6.0 × 10^-9 * 5.0 × 10^-9) / 0.3^2 ] + 8.99 × 10^9 * [ (-1.0 × 10^-9 * 5.0 × 10^-9) / 0.1^2 ]F = 6.21 N
Therefore, the magnitude of the net electrostatic force on the 5.0−nC charge due to the other charges when the charge Q1 = 6.0 nC is at (0.30 m, 0), charge Q2 = −1.0 nC is at (0, 0.10 m), and charge Q3 = 5.0 nC is at (0, 0) is 6.21 N.
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Select all equations that represent this question:
Priya is stacking building blocks to make a tower. She takes a break when the tower is 2 1/2 feet tall, which is 5/8 of the hight of the tower she wants ti build. How tall is the tower when finished?
Answer:
4 feet tall
Step-by-step explanation:
First find the unit rate of how close she is to being completed / the height of the tower
2.5/5 =.5
Next, multiply .5x8 = 4 feet fall when she is done
Please help me with this question!
Answer:
just gusset
Step-by-step explanation:
A bicycle wheel has a diameter of 26 inches. How far will the wheel travel in one revolution? (C=π×d,π≈3.14) A. 8.164 in. B. 81.64 in. C. 816.4 in. D. 8164 in.
Answer:
81.64 inches.
Step-by-step explanation:
You're looking for circumference here.
d = diameter of the wheel
d = 26 inches.
Input your values:
C = π * d
C = 3.14 * d
C = 3.14 * 26 inches
C = 81.64 inches.
Answer:
C≈81.68 in. thus B is the answer (I used more digits for π).
Step-by-step explanation:
Formula C=2πr
which score indicates the highest relative position? round your answer to two decimal places, if necessary. (a) a score of 2.9 on a test with
The score with the highest relative position is (a, b, or c), since the (IQR, mean, score, z score, or percentile) = a is highest.
Given the mean x and standard deviation s, the formula to translate a score x1 to its equivalent z-value is as follows:
\(z = \frac{x - x1}{s}\)
Using (1), the z-scores on the tests in parts (a)-(c) will be as follows:
(a)The comparable z-score for a given score of x = 3.4 will be where x1 = 4.3 and s = 1.5.
\(z=\frac{x - x1}{s} \\\)
= 3.4-4.3/1.5
= -0.6
(b) The standard deviation is 170 and the mean is x1 = 770. Therefore, for a score of x = 650, the appropriate z-score will be
z = 650-770/170
= -0.71
(c) Last but not least, a mean of x1 = 49 and a standard deviation of s = 4 will result in the following z-score for a given score of x = 41:
z = 41-49/4
= -2
The score in (a) has the highest relative z-score of the three values shown above, making it the highest grade relative to the other two.
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Complete question:
Which score indicates the highest relative position? Round your answer to two decimal places, if necessary.
(a) A score of 3.4 on a test with x = 4.3 and s = 1.5.
(b) A score of 650 on a test with x = 770 and s = 170.
(c) A score of 41 on a test with x = 49 and s = 4.
The score with the highest relative position is (a, b, or c), since the (IQR, mean, score, z score, or percentile) = _____ is highest.
Ixl fourth grade AA.9
the radius of a circle increases at a rate of 4 m/s. find the rate (in m2/s) at which the area of the circle increases when the radius is 8 m.
According to the solving the rate at which the area of the circle increases when the radius is 8 m.
= 64π m²/s.
What does a shape's area mean?The "space enclosed within the perimeter or the boundary" of the specified shape is what is referred to as the area of a shape. Using mathematical methods, we determine the area of various shapes.
Why is the formula for a circle?Using the equation of circle formula, we can determine the equation of any circle given its radius and center coordinates. (x−x1)2+(y−y1)2=r2 ( x − x 1 ) 2 + ( y − y 1 ) 2 = r 2 . is the equation for the circle formula.
According to the given information:The area of a circle (A) with radius (r) is given by
A = πr²
According to the dA/dt rule:
\(\frac{dA}{dt} = \frac{d(π r^2)}{dt}\)
= (dr/dt) = 2 πr(dr/dt)
given:
(dr/dt) = 4m/s.
dA/dt = 2 πr(4).
dA/dt = 8πr.
When r = 8m.
Substituting the value we get:
= dA/dt = 8πr.
= dA/dt = 8π8.
=dA/dt = 64π m²/s.
According to the solving the rate (in m2/s) at which the area of the circle increases when the radius is 8 m.
= 64π m²/s.
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Manipulation of Gaussian Random Variables. Consider a Gaussian random variable rN(, 2r), where I E R". Furthermore, we have y = A +b+. where y E RE. A E REXD, ERF, and w N(0, ) is indepen- dent Gaussian noise. "Independent" implies that and w are independent random variables and that is diagonal. n. Write down the likelihood pyar). b. The distribution p(w) - Spy)pudar is Gaussian. Compute the mean and the covariance . Derive your result in detail.
The mean vector of p(w) is zero, and the covariance matrix is a diagonal matrix with the variances of each element of w along the diagonal.
a. The likelihood function py(y|r) describes the probability distribution of the observed variable y given the Gaussian random variable r. Since y = A + b*r + w, we can express the likelihood as:
py(y|r) = p(y|A, b, r, w)
Given that w is an independent Gaussian noise with zero mean and covariance matrix , we can write the likelihood as:
py(y|r) = p(y|A, b, r) * p(w)
Since r is a Gaussian random variable with mean and covariance matrix 2r, we can express the conditional probability p(y|A, b, r) as a Gaussian distribution:
p(y|A, b, r) = N(A + b*r, )
Therefore, the likelihood function can be written as:
py(y|r) = N(A + b*r, ) * p(w)
b. The distribution p(w) is given as the product of the individual probability densities of the elements of w. Since w is an independent Gaussian noise, each element follows a Gaussian distribution with zero mean and variance from the diagonal covariance matrix. Therefore, we can write:
p(w) = p(w1) * p(w2) * ... * p(wn)
where p(wi) is the probability density function of the ith element of w, which is a Gaussian distribution with zero mean and variance .
To compute the mean and covariance of p(w), we can simply take the means and variances of each individual element of w. Since each element has a mean of zero, the mean vector of p(w) will also be zero.
For the covariance matrix, we can construct a diagonal matrix using the variances of each element of w. Let's denote this diagonal covariance matrix as . Then, the covariance matrix of p(w) will be:
Cov(w) = diag(, , ..., )
Each diagonal element represents the variance of the corresponding element of w.
In summary, the mean vector of p(w) is zero, and the covariance matrix is a diagonal matrix with the variances of each element of w along the diagonal.
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What are the rules of an isosceles right triangle?
Can someone help pls? With working out if possible :)
Answer:
x=7/2
Step-by-step explanation:
first, multiply 3/4 and 5/8 into the () to get rid of them.
3/4x -3/4 = 5/4x -5/2
next, combine like terms
5/4x -3/4x = -3/4 +5/2
1/2x = -3/4 +10/4 = 7/4
divide both sides by 1/2
x= 7/2
Carlos has 5/8 pounds of pumpkin seeds. He puts the seeds evenly into 10 bags. How much pumpkin seeds are in each bag
Answer:
5/80 = 0.0625
PLZ HELP ASAP ILL GIVE BRAINLEST
Answer:
2.25
Step-by-step explanation:
-9/-4= 2.25
I did the work and it's what the person above me said.
Multiply. Write your answer as a fraction in simplest form. −1(−3 1/2)= need ASAP
Answer:
3 1/2
Step-by-step explanation:
Please help me! I need help with this question.
Answer:
B. \(\triangle UVZ \cong \triangle VYX\), SSS
The congruent statement and the reason why the triangles are congruent is (b) ΔUVZ ≅ ΔVYX, SSS
How to determine the congruent statement and the reason?From the question, we have the following parameters that can be used in our computation:
Triangles = UVZ and VYX
There are several theorems that make any two triangles to be congruent
One of these theorems is the SSS congruent theorem
The SSS congruent theorem implies that the corresponding sides of the triangles in question are congruent
From the question, we can see that the following corresponding sides on the triangles UVZ and VYX have the same mark
UV and VY
UZ and VX
VZ and YX
This implies that these sides are congruent sides
Hence, the congruent statement on the congruency of the triangles is (b) ΔUVZ ≅ ΔVYX and the reason is by SSS
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Belinda eats 40 percent of the cake and Graham eats 25 percent of the remainder.
What is the mass of the cake left over?
Answer:
35%
Step-by-step explanation:
40%+25%=65%
100%-65%=35%
each year the fbi issues a report that provides information about crimes in the united states. the following table gives the total number of violent crimes in the united states for the year 1984 to 19994.plot the data. observe that there is a pattern but that several points don't fit the pattern. which points don't fit?
Plotting the data on a graph can help you identify the outliers or points that don't fit the pattern.
The dataset, you can use it to identify the points that don't fit the pattern.
The points that don't fit the pattern in a dataset.
The points that don't fit the pattern in a dataset, you can use several methods such as:
Visualization:
Plotting the data on a graph can help you identify the outliers or points that don't fit the pattern.
You can use various graph types such as scatter plots, line graphs, box plots, etc., to visualize the data.
Statistical methods:
You can use statistical methods such as standard deviation, z-score, or regression analysis to identify the outliers or points that don't fit the pattern.
Domain knowledge:
If you have domain knowledge about the dataset, you can use it to identify the points that don't fit the pattern.
If you know that a particular event occurred during a specific period, you can use it to explain the anomaly in the data.
The points that don't fit the pattern, you can investigate why they don't fit the pattern.
It could be due to measurement errors, data entry errors, or a genuine anomaly in the data.
Understanding why certain data points don't fit the pattern can provide insights into the data and improve the accuracy of the analysis.
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The ratio of students to teachers at a school is 15:1 if there are 49 teachers how many students are there
Answer:
735 students
Step-by-step explanation:
create a proportion of students to teachers
let 's' = # of students
\(\frac{15}{1}\) = \(\frac{s}{49}\)
cross-multiply to get:
s = 735
What is the center of a circle whose equation is x2 y2 4x â€" 8y 11 = 0? (â€"2, 4) (â€"4, 8) (2, â€"4) (4, â€"8)
Given the equation x² + y² + 4x - 8y + 11 = 0, the center of the circle is (-2, 4).
The standard form of the equation of circle is given by
(x - h)² + (y - k)² = r²
where (h , k) is the location of the center and r is the radius of the circle.
On the other hand, the general form of the equation of circle is given by
x² + y² + Dx + Ey + F = 0
where D = -2h, E = -2k, and F = h² + k² - r².
If the equation of the circle in general form is x² + y² + 4x - 8y + 11 = 0, then the coefficients are:
D = 4
E = -8
F = 11
If D = -2h and D = 4, then
4 = -2h
h = -2
If E = -2k and E = -8, then
-8 = -2k
k = 4
Hence, the center of the circle is (h, k) = (-2, 4).
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Write an equation with a variable for the diagram. What is the value of y?
Answer:
Y=18
Step-by-step explanation:
18+13=30 30*3=90
-10
ious Activity
Type har
-5
10+y
O
-10
-20
5
Select the quadratic inequality that represen
graph.
Ov²(x+3)²-24
vs-(x-3)²+24
v2 - (x-3)2+24
Oys (x+3)²-24
O
The quadratic inequality defined on the graph is given as follows:
y ≥ 2/3(x + 3)² - 24.
How to define the quadratic inequality?The coordinates of the vertex of the quadratic function are given as follows:
(-3, -24).
Hence the quadratic function is given as follows:
y = a(x + 3)² - 24.
In which a is the leading coefficient.
When x = 3, y = 0, hence the leading coefficient a is obtained as follows:
0 = a(3 + 3)² - 24
36a = 24
a = 24/36
a = 2/3.
Hence:
y = 2/3(x + 3)² - 24.
The quadratic function has a solid curve, and the values above it are pained, hence the inequality is given as follows:
y ≥ 2/3(x + 3)² - 24.
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The prime fatorization of a number is 2×2×3×7×7.Is the number a perfect square? How do you know
Hey there! I'm happy to help!
A perfect square is a number whose prime factors can be multiplied together to obtain two identical factors.
Look at 64. It's prime factors are 2×2×2×2×2×2. If we multiply these 2's together to obtain two identical numbers, then 64 is a perfect square.
We see that there are six twos being multiplied. So, that means we have two groups of three twos, and since they both have three twos, they are identical! Three twos multiplied is 8, and 8²=64. Pretty cool right?
Now, we need to find identical groups of these numbers. We have two sevens, two 2's and one three. We could have two groups with one 7 and one 2, but this extra 5 would throw it off balance, so we cannot obtain two equal numbers from this.
Therefore, this number is not a perfect square.
I hope that this helps! Have a wonderful day!
Dale can type 32 words in 8 minutes.
What is his rate in words per minute?
Answer:4 words per minute.
Step-by-step explanation:32 divided by 8 is 4.
.................................................
Answer: …………..
Step-by-step explanation:
……………..
Many states use a sequence of three letters followed by a sequence of three digits as their standard license-plate pattern. Given that each three-letter three-digit arrangement is equally likely, the probability that such a license plate will contain at least one palindrome (a three-letter arrangement or a three-digit arrangement that reads the same left-to-right as it does right-to-left) is m/nm/n, where mm and nn are relatively prime positive integers. Find m nm n.
Many states use a sequence of three letters followed by a sequence of three digits as their standard license-plate pattern. The required answer is 5036336.
Given that each three-letter three-digit arrangement is equally likely, the probability that such a license plate will contain at least one palindrome (a three-letter arrangement or a three-digit arrangement that reads the same left-to-right as it does right-to-left) is to be found.
Let's solve it.
The total number of such arrangements is
26 * 26 * 26 * 10 * 10 * 10 = 17,576,000,
and the number of palindrome arrangements is 26 * 10 + 26 = 286.
The probability that a plate will not contain any palindromes is 17,575,714 / 17,576,000.
Thus, the probability that a plate will contain at least one palindrome is:
1 - (17,575,714 / 17,576,000) = 286 / 17,576.
Therefore, the value of mm and nn are 286 and 17,576 respectively.
To obtain the answer, we need to find their product mm * nn, which is
286 * 17,576 = 5,036,336.
Hence, the required answer is 5036336.
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give a name for the shaded angle below
Answer:
It's probably ∠PNC
Match each transformation of Rx) with its description.
g(x) = 2x – 14
g(x) = 8r - 24
g(x) = 21 - 10
g(t) = 8.1 - 6
g(t) = 21 - 2
g(x) = 80 - 4
compresses fx) by a factor
of & toward the yaxis
>
shifts fx) 4 units down
shifts Ax) 4 units right
stretches Rx) by a factor
of 4 away from the x-axis
Answer:
Step-by-step explanation:
Alicia resolvió 45 problemas de un total de 70 problemas asignados. Qué fracción (en términos más simples) de los problemas que ha completado?
Answer:
no habla espanol
Step-by-step explanation:
Letang Industrial Systems Company (LISC) is trying to decide between two different conveyor belt systems. System A costs $280,000, has a four-year life, and requires $85,000 in pretax annual operating costs. System B costs $360,000, has a six-year life, and requires $79,000 in pretax annual operating costs. Both systems are to be depreciated straight-line to zero over their lives and will have zero salvage value. Whichever project is chosen, it will not be replaced when it wears out. The tax rate is 23 percent and the discount rate is 10 percent.
We have to calculate the EAC for both the conveyor belt system.
Solutions :
Equivalent Annual Cost or (EAC) for the SYSTEM-A
\($\text{Operating cash flow } = \text{Pre-tax annual operating cost (1-tax rate )} + (\text{depreciation expense} \times $\)tax rate )
\($=-855,000(1-0.23)+\left[\left(\frac{280,000}{4}\right)\times 0.23\right]$\)
\($= (-85,000 \times 0.77 ) + (70,000 \times 0.23)$\)
= $ 49,350
Year Annual Cost flow Present value factor Present Value of Annual
at 10% cash flow
1 -49,350 0.909091 -44,863.64
2 -49,350 0.826446 -40,785.12
3 -49,350 0.751315 -37,077.39
4 -49,350 0.683013 -33,706.71
Total $ 3.169865 $ -156,432.86
Therefore, Net Present value = present value of the annual cash flow - initial investment.
= 156,432.86 - 280,000
= $ 436,432.86 (negative)
Now the EAC or the Equivalent Annual Cost for System A :
\($\text{EAC}= \text{Net present value / (PVIFA 10 percent, 4 years)}$\)
\($=\frac{436,432.86}{3.169865}$\)
\($= 137,681.86 $\) dollar (negative)
\($\text{Operating cash flow } = \text{Pre-tax annual operating cost (1-tax rate )} + (\text{depreciation expense} \times $\)tax rate)
\($=79,000(1-0.23)+\left[\left(\frac{360,000}{6}\right) \times 0.23\right]$\)
\($=(-78,000 \times 0.77)+(60,000 \times 0.23)$\)
= -$ 47,030
Year Annual Cost flow Present value factor Present Value of Annual
at 10% cash flow
1 -47,030 0.909091 -42,754.55
2 -47,030 0.826446 -38,867.77
3 -47,030 0.751315 -35,334.34
4 -47,030 0.683013 -32,122.12
5 -47,030 0.620921 -29,201.93
6 -47,030 0.564474 -26,547.21
Total $ 4.355261 $ -204,827.91
Net Present Value = Present Value of annual cash inflows – Initial Investment
\($= 204,827.91 - 360,000$\)
= -$ 564,827.91 (negative)
EAC for system B:
Equivalent Annual Cost for system B \($=\frac{\text{net present value}}{\text{PVIFA 10 \text percent, 6 years}}$\)
\($=\frac{-564,827.91}{4.355261}$\)
= -$129,688.66 (negative)
please answer
4. Suppose that for 3MA Forecast, my Mean Absolute Deviation (MAD) is \( 3.0 \) and my Average Error (AE) is \( -2.0 \). Does my forecast fail the bias test? a. Yes b. No
The answer is: a. Yes, the forecast fails the bias test.
To determine whether the forecast fails the bias test, we need to compare the Average Error (AE) with zero.
If the AE is significantly different from zero, it indicates the presence of bias in the forecast. If the AE is close to zero, it suggests that the forecast is unbiased.
In this case, the Average Error (AE) is -2.0, which means that, on average, the forecast is 2.0 units lower than the actual values. Since the AE is not zero, we can conclude that there is a bias in the forecast.
Therefore, the answer is:
a. Yes, the forecast fails the bias test.
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