function f(x,y) = 2 + y
The minimum value are f(√5, √5) = 2 + √5.
Lagrange multipliers:To find the minimum value of the function f(x,y) = 2 + y subject to the constraint xy=5 using Lagrange multipliers,
we first set up the Lagrangian function:
L(x,y,λ) = f(x,y) - λ(xy - 5)
Taking partial derivatives with respect to x, y, and λ, we get:
∂L/∂x = 0 = -λy
∂L/∂y = 1 - λx
∂L/∂λ = xy - 5
Solving for λ from the first equation and substituting into the second equation, we get:
x/y = 0/λ
1 - λx = 0
xy - 5 = 0
From the first equation, we see that either x = 0 or y = 0. But since xy = 5, neither x nor y can be zero.
Therefore, we have:
λ = 0
1 - λx = 0
xy - 5 = 0
Solving for x and y from the last two equations, we get:
x = 5/y
y = ±√5
We take the positive root for y since we are looking for a minimum value of the function.
Substituting y = √5 into x = 5/y, we get x = √5.
Therefore, the minimum value of f(x,y) = 2 + y subject to the constraint xy=5 is:
f(√5, √5) = 2 + √5.
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Can somebody help me really quickly please
Answer: 77
Step-by-step explanation:
Bigger Rectangle = LW = 5x5 =25 There are 2 of those. =50
middl rectangle = LW = 5x3=15
triangles= 1/2 b h = 1/2 (3)(4) = 6 but therere are 2 so =12
Add up all shapes=50+15+12=77
what are the values of m and n, and what does the plotted graph look like?
The values of m and n are
m = 0 and n = 3.125
The graph is attached
How to find the values of m and nThe values of m and n are solved using the relationship between miles and kilometers. This type of relationship is a linear proportional relationship. Linear relationship implies the graph will be a straight line graph.
This relationship is that 1 mile equals 0.625 km hence the linear equation is
y = 0.625x
when x = 0, we have that
y = 0.625 * 0
y = 0
when x = 5, we have that
y = 0.625 * 5
y = 3.125
Where x is kilometers and y is miles
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People were asked if they were considering changing what they eat.29% of the people asked said yes.of these, 23% said they were considering becoming vegetarian.what percentage of the people asked said they were considering becoming vegetarian?
Answer:
66.7%
Step-by-step explanation:
Let people asked bye x.
Then, people considering to change = 29% of x
People considering to become vegetarians = 23% of (29% of x)
= 23/100 * 29x/100
= 667x/10000
Percentage of people considering to become vegetarians = 667x/10
= 66.7%
Stan's Car Rental charges $35 per day plus $0. 25 per mile. Denise wants to rent one of Stan's cars, keeping the total
cost of the rental to no more than $55. What is the greatest number of miles Denise can drive the
car to stay within her budget?
O A) 75 miles
O B) 80 miles
O c) 90 miles
OD) 100 miles
Denise can drive at most 80 miles to stay within her budget of $55.
Let's assume that Denise drives x miles during the rental period. Then the total cost of the rental will be:
Total cost = $35 (flat rate for the day) + $0.25 per mile x (number of miles driven)
We want to find the greatest number of miles that Denise can drive and still stay within her budget of $55, so we can set up an inequality as follows:
Total cost ≤ $55
$35 + $0.25x ≤ $55
Subtracting $35 from both sides
$0.25x ≤ $20
Dividing both sides by $0.25
x ≤ 80
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In a recent Game Show Network survey, 30% of 5000 viewers are under 30. What is the margin of error at the 99% confidence interval? Using statistical terminology and a complete sentence, what does this mean? (Use z*=2. 576)
Margin of error:
Interpretation:
The margin of error at the 99% confidence interval is 1.39%. Interpretation: we can be 99% confident that the true proportion of viewers under 30 in the population falls within the range of 30% ± 1.39%.
To calculate the margin of error at the 99% confidence interval, we can use the formula:
Margin of error = z* × √(p × (1 - p) / n)
where z* is the critical value (2.576 for a 99% confidence interval), p is the sample proportion (0.30), and n is the sample size (5000).
Margin of error = 2.576 × √(0.30 × (1 - 0.30) / 5000) ≈ 0.0139 or 1.39%
The interpretation of this result is that we can be 99% confident that the true proportion of viewers under 30 in the population falls within the range of 30% ± 1.39%. In other words, if we were to conduct the survey multiple times, we would expect the proportion of viewers under 30 to fall within this interval 99 out of 100 times. This information is useful for understanding the level of uncertainty in the survey results and can help guide decision-making based on the findings.
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Evaluate the integral by making an appropriate change of variables. Sle 9e2x + 2y da, where R is given by the inequality 2[x] + 2 y = 2
Using the change of variables u = x and v = x + y, we transform the given region R into a rectangle S, and evaluate the integral as 9 (e^6 - 2e^4 + e^2 - 1).
We need to find a change of variables that maps the region R onto a rectangle in the uv-plane. Let's make the following substitutions
u = x
v = x + y
Then, the region R is transformed into the rectangle S defined by 0 ≤ u ≤ 1 and 0 ≤ v ≤ 2.
To find the limits of integration in the new variables, we can solve the equations 2[x] + 2y = 2 for x and y in terms of u and v
2[x] + 2y = 2
2u + 2v - 2[x] = 2
[x] = u + v - 1
Since [x] is the greatest integer less than or equal to x, we have
u + v - 1 ≤ x < u + v
Also, since 0 ≤ y ≤ 1, we have
0 ≤ x + y - u ≤ 1
u ≤ x + y < u + 1
u - x ≤ y < 1 + u - x
Now we can evaluate the integral using the new variables
∫∫R 9e^(2x+2y) dA = ∫∫S 9e^(2u+2v) |J| dudv
where J is the Jacobian of the transformation, given by
|J| = det [[∂x/∂u, ∂x/∂v], [∂y/∂u, ∂y/∂v]]
= det [[1, 1], [-1, 1]]
= 2
Therefore, the integral becomes
∫∫S 9e^(2u+2v) |J| dudv = 2 ∫0^1 ∫0^2 9e^(2u+2v) dudv
= 2 ∫0^1 [9e^(2u+2v)/2]_0^2 dv
= 2 ∫0^1 (9/2)(e^(4+2v) - e^(2v)) dv
= 2 (9/2) [(e^6 - e^2)/2 - (e^4 - 1)/2]
= 9 (e^6 - 2e^4 + e^2 - 1)
Therefore, the value of the integral is 9 (e^6 - 2e^4 + e^2 - 1).
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simplify, please, and thank you!
Answer:
(3x+4) ÷ (x+6)
Step-by-step explanation:
3x²-14x-24 = (3x+4) (x-6)
x²-36 = (x+6) (x-6)
= (3x+4) (x-6) ÷ (x+6) (x-6)
Eliminate the (x-6)
= (3x+4) ÷ (x+6)
Find the divergence of vector fields at all points where they are defined.
div ( (2x^2 - sin(x2)) i + 5] - (sin(X2)) k)
The divergence of the given vector field at all points where it's defined is div [tex]F = 4x - 2x × cos(x^2).[/tex]
To find the divergence of the given vector field at all points where it's defined, we will use the following terms:
divergence, vector field, and partial derivatives.
The given vector field is[tex]F = (2x^2 - sin(x^2)) i + 5j - sin(x^2) k.[/tex]
To find the divergence of F (div F), we need to take the partial derivatives of each component with respect to their
respective variables and then sum them up. So, div [tex]F = (∂(2x^2 - sin(x^2))/∂x) + (∂5/∂y) + (∂(-sin(x^2))/∂z)[/tex].
Find the partial derivative of the first component with respect to x:
[tex]∂(2x^2 - sin(x^2))/∂x = 4x - 2x × cos(x^2)[/tex] (applying chain rule).
Find the partial derivative of the second component with respect to y:
∂5/∂y = 0 (since 5 is a constant).
Find the partial derivative of the third component with respect to z:
[tex]∂(-sin(x^2))/∂z = 0[/tex] (since there is no z variable in the component).
Sum up the partial derivatives:
[tex]div F = (4x - 2x × cos(x^2)) + 0 + 0 = 4x - 2x × cos(x^2).[/tex]
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f(x,y) = x2 + y² + xy {(x, y) : x2 + y2 < 1}
"Find the maxima and minima, and where they are reached, of the
following function. Find the locals and absolutes. Identify the
critical points inside the disk if any."
The given function f(x,y) = x^2 + y^2 + xy has a maximum value of 3/4 at (x,y) = (1/2,1/2) and a minimum value of -1/4 at (x,y) = (-1/2,1/2) inside the disk x^2 + y^2 < 1. There are no critical points inside the disk.
To find the critical points, we need to take partial derivatives of the function with respect to x and y and solve the resulting equations simultaneously.
fx = 2x + y = 0
fy = 2y + x = 0
Solving these equations, we get the critical point at (x,y) = (-1/2,-1/2) outside the disk. Hence, we do not consider it further.
Next, we need to find the boundary points of the disk, which is the circle x^2 + y^2 = 1. We can parameterize this circle as x = cos(t) and y = sin(t), where t ranges from 0 to 2π.
Substituting these values in the given function, we get:
f(cos(t), sin(t)) = cos^2(t) + sin^2(t) + cos(t)sin(t)
= 1/2 + 1/2sin(2t)
Now, we need to find the maximum and minimum values of this function. Since sin(2t) ranges from -1 to 1, the maximum value of the function is 3/4 when sin(2t) = 1, i.e., when t = π/4 or 5π/4. At these points, x = cos(π/4) = 1/2 and y = sin(π/4) = 1/2.
Similarly, the minimum value of the function is -1/4 when sin(2t) = -1, i.e., when t = 3π/4 or 7π/4. At these points, x = cos(3π/4) = -1/2 and y = sin(3π/4) = 1/2.
Therefore, the function has a maximum value of 3/4 at (x,y) = (1/2,1/2) and a minimum value of -1/4 at (x,y) = (-1/2,1/2) inside the disk x^2 + y^2 < 1. There are no critical points inside the disk.
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A store has `80` pumpkins for sale. Here are the values of the quartiles. About how many of the `80` pumpkins would you expect to weigh less than `15.5` pounds
This is just a rough estimate, and the actual number of pumpkins that weigh less than 15.5 pounds could be slightly higher or lower.
What is the median?
The median is a measure of central tendency that represents the middle value in a dataset when the values are arranged in order of magnitude.
Assuming that the quartiles divide the pumpkins' weights into four equal parts, we can use the value of the second quartile (Q2) to estimate the median weight of the pumpkins. Since there are 80 pumpkins, Q2 would be the average of the 40th and 41st heaviest pumpkins.
We don't know the exact values of the quartiles, but we can make some reasonable assumptions. For example, if we assume that the first quartile (Q1) is around 12 pounds and the third quartile (Q3) is around 20 pounds, then we can estimate the median weight as follows:
Median = (Q2) = (Q1 + Q3)/2 = (12 + 20)/2 = 16 pounds
Based on this estimate, we can expect that roughly half of the 80 pumpkins (i.e., 40 pumpkins) weigh less than 16 pounds. Therefore, we might expect that slightly fewer than 40 pumpkins would weigh less than 15.5 pounds.
However, this is just a rough estimate, and the actual number of pumpkins that weigh less than 15.5 pounds could be slightly higher or lower depending on the distribution of the pumpkin weights.
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Garden plots in the Portland Community Garden are rectangles limited to 45 square meters. Christopher and his friends want a plot that has a width of 7.5 meters. What length will give a plot that has the maximum area allowed?
The length that will give a plot with the maximum area allowed is 6 meters.
To find the length that will give a plot with the maximum area, we need to use the formula for the area of a rectangle, which is A = lw, where A is the area, l is the length, and w is the width. In this case, we are given that the area is 45 square meters, and the width is 7.5 meters.
Substituting these values into the formula, we get:
45 = l(7.5)
To solve for l, we divide both sides by 7.5:
l = 45/7.5
Simplifying, we get:
l = 6
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A telephone pole has a wire attached to its top that is anchored to the ground. the distance from the bottom of the pole to the anchor point is
69 feet less than the height of the pole. if the wire is to be
6 feet longer than the height of the pole, what is the height of the pole?
A telephone pole has a wire attached to its top that is anchored to the ground then conclude the height of the pole is approximately 51.53 feet.
Let h be the height of the pole. The equation h = (h - 69) + 6 represents the given information. Solving it gives h = 75.
Let's denote the height of the pole as "h". Then, according to the problem, the distance from the bottom of the pole to the anchor point is 69 feet less than the height of the pole, which means it is h - 69. Additionally, the wire is to be 6 feet longer than the height of the pole, so its length is h + 6.
Now we can use the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (in this case, the wire) is equal to the sum of the squares of the lengths of the other two sides (in this case, the height of the pole and the distance from the bottom of the pole to the anchor point). So we have:
(h - 69)^2 + h^2 = (h + 6)^2
Expanding and simplifying, we get:h^2 - 138h + 4761 + h^2 = h^2 + 12h + 36
Rearranging and simplifying, we get:h^2 - 75h - 1602 = 0
We can solve for h using the quadratic formula:h = (-b ± sqrt(b^2 - 4ac)) / 2a
where a = 1, b = -75, and c = -1602.
Plugging in these values, we get:h = (75 ± sqrt(75^2 - 4(1)(-1602))) / 2(1)
h ≈ 51.53 or h ≈ -31.53
Since the height of the pole cannot be negative, we can ignore the negative solution and conclude that the height of the pole is approximately 51.53 feet.
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Can someone please help! All I need is 19, 20, 21, 22, 23, 24! Thank you
Answer:
hope it helps! :)
Step-by-step explanation:
m < A = 61 bc 90+29=119
180-119=61
ED: 9y-22=5
9y=27
y=3
9(3)-22 =5
ED=5
3x-5=13
3x=18
x=6
[tex]BC^{2}[/tex]+25+=169
[tex]BC^{2}[/tex]=144
BC=12
m<DCE=29
y=3
Shelby multiplies 7,358.9 by a power of 10 and gets the product
73.589. select all possible factors.
(a) 1/100 "fraction"
(b) 1/10 "fraction"
(c) 1
(d) 0.1
(e) 0.01
(f) 0.001
(a) 1/100 (or 0.01)
(e) 0.01
This factor represents dividing the number by 100.
When Shelby multiplies 7,358.9 by a power of 10 and gets the product 73.589, we can determine the factor by comparing the two numbers.
7,358.9 → 73.589
We can see that the decimal point has moved two places to the left. Therefore, the factor is the one that will shift the decimal point two places to the left. Among the given options, the factor that does this is:
(a) 1/100 (or 0.01)
(e) 0.01
This factor represents dividing the number by 100. The other options (b, c, d, and f) do not represent the correct division by powers of 10 in this case.
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PART 2:
The regular price, in dollars, the gym charges can be represented by the equation y=15x+20
B.How much money, in dollars, does justin save the first month by joining the gym at the discounted price rather than at the regular price?
The amount of money Justin saves in the first month would be 5 times the value of x, where x represents the number of months of gym membership, based on the discounted price provided.
What is the linear equation?A linear equation is an equation in mathematics that represents a relationship between two variables that is a straight line when graphed on a coordinate plane. It is an equation of the form:
y = mx + b
To calculate the amount of money Justin saves in the first month by joining the gym at the discounted price rather than the regular price, we need to know the discounted price.
The equation given is y = 15x + 20, where y represents the regular price in dollars and x represents the number of months of gym membership. However, we need to know the discounted price, which is not provided in the given information.
Once we have the discounted price, we can substitute it into the equation and calculate the savings. For example, if the discounted price is y = 10x + 20, then we can calculate the savings by subtracting the discounted price from the regular price:
Savings = Regular price - Discounted price
= (15x + 20) - (10x + 20)
= 15x - 10x
= 5x
Hence, the amount of money Justin saves in the first month would be 5 times the value of x, where x represents the number of months of gym membership, based on the discounted price provided.
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I have tried doing this question for 20 minutes but I just can't get the answer, (add maths circular measure)
the answer is 17.2cm² supposedly
Answer:
17.2 cm²
Step-by-step explanation:
Alr let me try
The angle is 1.2 you got it right. The rest is in the pics
Answer: A(shaded)=17.15 cm²
Step-by-step explanation:
What you did so far is correct.
Given:
r=5
s=6
Solve for Ф angle:
s=[tex]\frac{part circle}{wholecircle} 2\pi r[/tex] This way help you find the portion/percent you want
6=(Ф/360) (2[tex]\pi[/tex]5) >solve for Ф Divide by (2[tex]\pi[/tex]5) and multiply by 360
Ф=68.75
Solve for pie/sector
Now that you have the angle, you can use the same concept for area
Area of sector = [tex]\frac{part circle}{wholecircle} \pi r^{2}[/tex]
Area of sector = [tex]\frac{68.75}{360} \pi 5^{2}[/tex]
Area of sector = 15.0 cm²
Now let find y so we can plug into area of triangle
use tan Ф = opposite/adjacent
tan 68.75 = y/5
y=5 * tan 68.75
y=12.86 cm
Area of triangle = 1/2 b h b=y=12.86 h =5
Area of triangle = 1/2* 12.86*5
Area of triangle = 32.15 cm²
Now subtract area of sector from triangle
A(shaded)=A(triangle)-A(sector)
A(shaded)=32.15- 15.0
A(shaded)=17.15 cm²
An artist buys 2 liters of paint for a project. When he is done with the project, he has 350 milliliters of the paint left over. The paint costs 2¢ per milliliter. How many dollars’ worth of paint does the artist use for the project?
The artist used a total of $0.33 worth of paint for the project.
The artist purchased 2 liters of paint, which is equivalent to 2,000 milliliters of paint. This amount of paint was used to complete a project, and after the project was finished, there were 350 milliliters of paint left over.
To determine how much paint was used for the project, we subtract the amount of leftover paint from the total amount of paint purchased, which gives us 2,000 - 350 = 1,650 milliliters of paint used for the project.
The cost of the paint is 2 cents per milliliter, which is equivalent to $0.02/100 milliliters or $0.0002 per milliliter. To determine the cost of the paint used for the project, we multiply the amount of paint used by the cost per milliliter.
Therefore, the cost of 1,650 milliliters of paint used for the project can be calculated by multiplying 1,650 milliliters by $0.0002 per milliliter, which gives us $0.33.
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Evaluate the integral (Use symbolic notation and fractions where needed. Use for the arbitrary constant. Absorb into C as much as possible.) 3x + 6 2 1 x 0316 - 3 dx = 11 (3) 3 27 In(x - 1) 6 + Sin(x-3) 6 +C Incorrect
To evaluate the integral of (3x+6)/(2x²-3)dx, we can use partial fraction decomposition:
(3x+6)/(2x²-3) = A/(x-√(3)/2) + B/(x+√(3)/2)
Multiplying both sides by the denominator and simplifying, we get:
3x+6 = A(x+√(3)/2) + B(x-√(3)/2)
Setting x = √(3)/2, we get:
3√(3)/2 + 6 = B(√(3)/2-√(3)/2) = 0
So B = -2√(3). Setting x = -√(3)/2, we get:
-3√(3)/2 + 6 = A(-√(3)/2+√(3)/2) = 0
So A = 2√(3). Therefore, we have:
(3x+6)/(2x^2-3) = 2√(3)/(x-√(3)/2) - 2√(3)/(x+√(3)/2)
Integrating each term, we get:
∫(3x+6)/(2x²-3)dx = 2√(3)ln|x-√(3)/2| - 2√(3)ln|x+√(3)/2| + C
where C is the arbitrary constant.
To evaluate the integral of the function 3x + 6 with respect to x, we will use the integral symbol and find the antiderivative:
∫(3x + 6) dx
To find the antiderivative, we will apply the power rule, which states that the integral of x^n is (x^(n+1))/(n+1), and the constant rule, which states that the integral of a constant is the constant times the variable:
(3 * (x^(1+1))/(1+1)) + (6 * x) + C
Simplifying the expression:
(3x²)/2 + 6x + C
Here, C is the arbitrary constant. So, the evaluated integral of 3x + 6 is:
(3x²)/2 + 6x + C
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okay ummm deleted question
Answer:
Sure, let me know if you have a new question or need any assistance!
Refer to the data in exercise 2. should sarah use the mean or the median to show that she exercises for large amounts of time each day? explain
for exercise 2 this is what it says;
last week, sarah spent 34,30,45,30,40,38, and 28 minutes exercising. find the mean, median, and mode. round to the nearest whole number
The mean is 35 minutes and the median is 34 minutes.
let's first calculate the mean, median, and mode for Sarah's exercise times: 34, 30, 45, 30, 40, 38, and 28 minutes.
Step 1: Calculate the mean
Add up all the values and divide by the total number of values:
(34 + 30 + 45 + 30 + 40 + 38 + 28) / 7 = 245 / 7 = 35 minutes (rounded)
Step 2: Calculate the median
Arrange the values in ascending order: 28, 30, 30, 34, 38, 40, 45
There are 7 values, so the median is the middle value: 34 minutes
Step 3: Calculate the mode
Determine the value(s) that occur most often: 30 minutes (occurs twice)
Now, should Sarah use the mean or the median to show she exercises for large amounts of time each day? The mean is 35 minutes and the median is 34 minutes. Both values are close and represent the central tendency of the data. However, since the mean is slightly higher than the median, Sarah should use the mean (35 minutes) to show she exercises for a larger amount of time each day.
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an object that weighs 200 pounfs is on an invline planethat makes an angle of 10 degrees with the horizontal
The component of the weight parallel to the inclined plane is approximately 34.72 pounds, and the component perpendicular to the inclined plane is approximately 196.96 pounds.
To analyze the situation, we need to break down the weight of the object into its components parallel and perpendicular to the inclined plane.
Given:
Weight of the object = 200 pounds
Angle of the inclined plane with the horizontal = 10 degrees
First, we find the component of the weight parallel to the inclined plane. This component can be determined using trigonometry:
Component parallel to the inclined plane = Weight * sin(angle)
Component parallel to the inclined plane = 200 pounds * sin(10 degrees)
Component parallel to the inclined plane ≈ 200 pounds * 0.1736
Component parallel to the inclined plane ≈ 34.72 pounds
Next, we find the component of the weight perpendicular to the inclined plane:
Component perpendicular to the inclined plane = Weight * cos(angle)
Component perpendicular to the inclined plane = 200 pounds * cos(10 degrees)
Component perpendicular to the inclined plane ≈ 200 pounds * 0.9848
Component perpendicular to the inclined plane ≈ 196.96 pounds
Therefore, the component of the weight parallel to the inclined plane and the component perpendicular to the inclined plane is approximately 34.72 pounds and 196.96 pounds respectively.
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Find the linearization of the function f (x, y) = √x^2 + y^2 at the point (3, 4), and use it to approximate f (2.9, 4.1).
Therefore, the linearization predicts that f(2.9, 4.1) is approximately 4.142.
To find the linearization of the function f(x, y) = √x^2 + y^2 at the point (3, 4), we need to find the partial derivatives of f with respect to x and y, evaluate them at (3, 4), and use them to write the equation of the tangent plane to the surface at that point.
First, we have:
∂f/∂x = x/√(x^2 + y^2)
∂f/∂y = y/√(x^2 + y^2)
Evaluating these at (3, 4), we get:
∂f/∂x(3, 4) = 3/5
∂f/∂y(3, 4) = 4/5
So the equation of the tangent plane to the surface at (3, 4) is:
z - f(3, 4) = (∂f/∂x(3, 4))(x - 3) + (∂f/∂y(3, 4))(y - 4)
Plugging in f(3, 4) = 5 and the partial derivatives, we get:
z - 5 = (3/5)(x - 3) + (4/5)(y - 4)
Simplifying, we get:
z = (3/5)x + (4/5)y - 1
This is the linearization of f(x, y) = √x^2 + y^2 at the point (3, 4).
To approximate f(2.9, 4.1), we plug in x = 2.9 and y = 4.1 into the linearization:
z = (3/5)(2.9) + (4/5)(4.1) - 1
z ≈ 4.142
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Which correctly describes how to graph the equation shown below?
y=1/4x
Start with a point at (1, 4). Then go up 1 and 4 to the right.
Start with a point at (1, 4). Then go up 4 and 1 to the right.
Start with a point at (0, 0). Then go up 4 and 1 to the right.
Start with a point at (0, 0). Then go up 1 and 4 to the right.
The statement which correctly describes how to graph the equation shown above include the following: Start with a point at (0, 0). Then go up 1 and 4 to the right.
What is a translation?In Mathematics, the translation a geometric figure or graph to the right simply means adding a digit to the value on the x-coordinate of the pre-image while the translation a geometric figure or graph upward simply means adding a digit to the value on the y-coordinate (y-axis) of the pre-image.
In Mathematics and Geometry, the translation a geometric figure upward simply means adding a digit to the value on the positive y-coordinate (y-axis) of the pre-image;
g(x) = f(x) + N
g(x) = y = 1/4(x)
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A regular pentagonal prism has an edge length 9 m, and height 13 m. Identify the volume of the prism to the nearest tenth
The volume of the regular pentagonal prism with an edge length of 9 m and a height of 13 m is approximately 1811.6 m³ to the nearest tenth.
To find the volume of a regular pentagonal prism with an edge length of 9 m and a height of 13 m, follow these steps:
Step 1: Find the apothem (a) of the base pentagon. Use the formula a = s / (2 * tan(180/n)), where s is the edge length and n is the number of sides (5 for a pentagon).
a = 9 / (2 * tan(180/5))
a ≈ 6.1803 m
Step 2: Calculate the area (A) of the base pentagon. Use the formula A = (1/2) * n * s * a.
A = (1/2) * 5 * 9 * 6.1803
A ≈ 139.3541 m²
Step 3: Determine the volume (V) of the pentagonal prism. Use the formula V = A * h, where h is the height.
V = 139.3541 * 13
V ≈ 1811.6033 m³
So, the volume of the regular pentagonal prism with an edge length of 9 m and a height of 13 m is approximately 1811.6 m³ to the nearest tenth.
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10. Determine the line of regression and use it to find the best predicted new mileage rating of a ( point) four-wheel-drive vehicle given that the old rating is 19 mi/gal old 6 27 1 33 28 24 8 22 20 29 21 New 15 24 15 29 25 22 6 20 826 19 Oy 0.808 0.863x; 18.1 mi/gal Oy = 0.863 + 0.808x; 16.2 mi/gal oy 0.863 + 0.808x; 22.4 mi/gal y-0.808+ 0.863x; 17.2 mi/gal
The line of regression equation for the mileage rating of a ( point) four wheel drive vehicle is [tex]\hat y = 16.111 + 0.365x,[/tex] and the best predicted new mileage rating of a ( point) four-wheel drive vehicle when x = 19 mi/gal, is equals to the 23.046 mi/gal. So, option(b) is right one.
A linear regression line has an equation of the form [tex]\hat y = a + bx,[/tex]
where x is the independent variable and y is the dependent variable. The slope of the line is b, and a is the estimated intercept (the value of y when x = 0). We have a table form data of old and new rating of four-wheel-drive vehicles. We have to determine the line of regression. Now, we have to calculate the value of 'a' and 'b'. Let the old and new mileage rating of four-wheel-drive vehicles be represented by vaiables 'x' and 'y'. Using the following formulas, [tex]b =\frac{ S_{xy}}{S_{xx}}[/tex] where, [tex]S_{xx} = \sum x² - \frac{ (\sum x)² }{n} [/tex]
[tex]S_{xy} = \sum xy - \frac{ (\sum y \sum x) }{n}[/tex][tex]a = \bar y - b \bar x,[/tex]where , [tex]\bar x = \frac{\sum x }{n}[/tex]
[tex]\bar y = \frac{\sum y }{n}[/tex]Here, n = 11, [tex]\sum x[/tex] = 235
[tex]\sum xy[/tex] = 263, [tex]\sum x²[/tex] = 5733, [tex]\sum xy[/tex] = 5879, so
[tex]S_{xx}[/tex] = 5733 - (235)²/11
= 5733 - 5020.454 = 712.546
[tex]S_{xy}[/tex] = 5879 - (235×263)/11
= 260.364
Now, b = 260.364/712.546 = 0.365
a = (263/11) - 0.365 ( 235/11)
= 23.909 - 7.798
= 16.111
So, regression line equation is
[tex]\hat y = 16.111 + 0.365x,[/tex]
The best predicted value of y, when x = 19 mi/gal, [tex]\hat y = 19× 0.365 + 16.111[/tex]
=23.046 mi/gal
Hence, the best predicted value is
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Complete question:
10. Determine the line of regression and use it to find the best predicted new mileage rating of a ( point) four-wheel-drive vehicle given that the old rating is 19 mi/gal
old 6 27 17 33 28 24 8 22 20 29 21
New 15 24 15 29 25 22 6 20 82 6 19
a) y cap = 0.863 + 0.808x; 16.2 mi/gal
b) y cap = 16.111 + 0.365x; 23.04 mi/gal
c) y cap =0.808+ 0.863x; 17.2 mi/gal
d) y cap = 0.808 0.863x; 18.1 mi/gal
D is the centroid of PQR PA= equals 17 BD equals nine and DQ equals 14 find each missing measure
The centroid of the triangle is D and the measures of sides are solved
Given data ,
Let the triangle be represented as ΔPQR
Now , the centroid of the triangle is D
where the measure of PA = 17 units
The measure of BD = 9 units
And , the measure of side DQ = 14 units
Now , centroid of a triangle is formed when three medians of a triangle intersect
And , from the properties of centroid of triangle , we get
PA = AR
DR = DQ
AD = BD
On simplifying , we get
The measure of side AR = 17 units
PR = PA + AR = 34 units
The measure of side DR = 14 units
BR = BD + DR = 23 units
The measure of side AD = 9 units
AQ = AD + DQ = 23 units
Hence , the centroid is solved
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PLEASE HELP WILL MARK BRANLIEST !!!
If password begin with capital letter followed by lower case letter, and end with symbol , then the number of unique passwords which can be created using letters and symbols are 47525504.
The password must have 6 characters and the first character must be a capital letter, so, we have 26 choices for the first character.
For the second character, we have 26 choices for a lower-case letter.
For the third, fourth, and fifth characters, we can choose from any of the 26 letters (upper or lower case).
For the last character, we have 4 choices for the symbol
So, total number of unique passwords that can be created is:
⇒ 26 × 26 × 26 × 26 × 26 × 4 = 26⁵ × 4 = 47525504.
Therefore, there are 47525504 unique passwords that can be created using these letters and symbols.
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If a side of a square is doubled and an adjacent side is diminished by 3, a rectangle is formed whose area is numerically greater than the area of the square by twice the original side of the square. Find the dimensions of the original square
The dimensions of the original square is 8 by 8.
Let x be the original side length of the square. The area of the square is x². When one side is doubled and the adjacent side is diminished by 3, the rectangle's dimensions become 2x and (x-3). The area of the rectangle is (2x)(x-3) = 2x² - 6x.
According to the problem, the area of the rectangle is greater than the area of the square by twice the original side of the square, which is 2x. So we can set up the equation:
2x² - 6x = x² + 2x
Now, solve for x:
2x² - x² = 6x + 2x
x² = 8x
x = 8
So the dimensions of the original square are 8 by 8.
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Simplify the following using appropriate properties :
(a) [1/2 x 1/4 ]+[1/2 x6]
(b) [1/5 x 2/15] - [1/5 x 2/15]
I need step by step explanation please will mark as brainliest if you give good explanation
Step-by-step explanation:
(a) [1/2 x 1/4] + [1/2 x 6]
First, we can simplify each term separately:
1/2 x 1/4 = 1/8
1/2 x 6 = 3
Now, we can add these two simplified terms:
1/8 + 3 = 3 1/8
Therefore, [1/2 x 1/4] + [1/2 x 6] simplifies to 3 1/8.
(b) [1/5 x 2/15] - [1/5 x 2/15]
Both terms are the same, so when we subtract them, the result will be zero:
[1/5 x 2/15] - [1/5 x 2/15] = 0
Therefore, [1/5 x 2/15] - [1/5 x 2/15] simplifies to 0.
Determine the specified confidence interval. An organization advocating for healthcare reform has estimated the average cost of providing healthcare for a senior citizen receiving Medicare to be about $13,000 per year. The article also stated that, with 90% confidence, the margin or error for the estimate is $1,000. Determine the resulting 90% confidence interval for the average cost for healthcare of a senior citizen receiving Medicare
the resulting 90% confidence interval for the average cost for healthcare of a senior citizen receiving Medicare is [$12,000, $14,000].
The estimated average cost of providing healthcare for a senior citizen receiving Medicare is $13,000 per year, and the margin of error for this estimate is $1,000 with a 90% confidence level.
To find the confidence interval, we need to add and subtract the margin of error from the estimated mean.
Lower Limit = Estimated Mean - Margin of Error
Lower Limit = 13,000 - 1,000
Lower Limit = 12,000
Upper Limit = Estimated Mean + Margin of Error
Upper Limit = 13,000 + 1,000
Upper Limit = 14,000
Therefore, the resulting 90% confidence interval for the average cost for healthcare of a senior citizen receiving Medicare is [$12,000, $14,000]. This means we are 90% confident that the true mean cost of providing healthcare for a senior citizen receiving Medicare is between $12,000 and $14,000 per year.
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