The mass and center of mass of the lamina is [tex]\frac{8}{15} k, (0, \frac{4}{7} )[/tex]
The mass of a homogenous lamina is given by [tex]$m=\iint_R \delta(x, y) d A$[/tex]
We can rewrite the equation using the limits of integration as [tex]$$m=\int_a^b \int_c^d \delta(x, y) d y d x$,[/tex] where a ≤ x ≤ b and c ≤ y ≤ d.
The objective is to find the mass and center of mass of the lamina that occupies the region D.
From the given equations, we get the limits of integration as -1 ≤ x ≤ 1 and 0 ≤ x ≤ 1-[tex]x^{2}[/tex]. Substitute the known values in the equation.
[tex]$$\begin{aligned}& m=\int_{-1}^1 \int_0^{1-x^2} k y d y d x \\& =\int_{-1}^1 \frac{1}{2} k\left(1-x^2\right)^2 d x \\& =\frac{1}{2} k \int_{-1}^1\left(1+x^4-2 x^2\right) d x \\& =\frac{k}{2}\left[x+\frac{x^5}{5}-2 \frac{x^3}{3}\right]_{-1}^1 \\\\\end{aligned}$$[/tex]
[tex]& =\frac{k}{2}\left[1+\frac{1}{5}-\frac{2}{3}+1+\frac{1}{5}-\frac{2}{3}\right] \\\\& =\frac{k}{2}\left[\frac{16}{15}\right] \\\\& =\frac{8}{15} k[/tex]
Hence, the mass of the lamina as [tex]\frac{8}{15} k[/tex].
The center of mass of the lamina is given by[tex]$(\bar{x}, \bar{y})$[/tex], where [tex]$$\begin{gathered}\bar{x}=\frac{1}{m} \iint_R x \delta(x, y) d A \text { and } \\\bar{y}=\frac{1}{m} \iint_R y \delta(x, y) d A .\end{gathered}$$[/tex]
First, find [tex]$\bar{x}$[/tex] as follows:
[tex]$$\begin{aligned}\bar{x} & =\frac{1}{\frac{8}{15} \mathrm{k}} \int_{-1}^1 \int_0^{1-x^2} k x y d y d x \\& =\frac{1}{\frac{8}{15} \mathrm{k}} \int_{-1}^1 \frac{1}{2} k x\left(1-x^2\right)^2 d x \\= & \frac{15}{8 k} \cdot \frac{k}{2} \int_{-1}^1 x\left(1+x^4-2 x^2\right) d x \\= & \frac{15}{16}\left[\frac{x^2}{2}+\frac{x^6}{6}-2 \frac{x^4}{4}\right]_{-1}^1 \\= & 0\end{aligned}$$[/tex]
Thus, the [tex]$\bar{x}$[/tex]-coordinate of the center of gravity as 0 .
Now, evaluate [tex]$\bar{y}$[/tex].
[tex]& \bar{y}=\frac{1}{\frac{8}{15}} \int_{-1}^1 \int_0^{1-x^2} k y^2 d y d x \\\\& =\frac{1}{\frac{8}{15}} \int_{-1}^1 \frac{1}{3} k\left(1-x^2\right)^3 d x \\\\& =\frac{15}{8 k} \cdot \frac{k}{3} \int_{-1}^1\left(1-x^6-3 x^2+3 x^4\right) d x \\\\& =\frac{15}{24}\left[x-\frac{x^7}{7}-3 \frac{x^3}{3}+3 \frac{x^5}{5}\right]_{-1}^1 \\\\& =\frac{15}{24} \times \frac{32}{35} \\\\& =\frac{4}{7}[/tex]
Hence, the center of gravity of the lamina is ([tex]0, \frac{4}{7}[/tex]).
Therefore, the mass and center of mass of the lamina that occupies the region D is [tex]\frac{8}{15} k[/tex], [tex](0, \frac{4}{7} )[/tex]
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Which equation shows the proportional relationship in the table
How to figure out the unit rate of 4/5 cup of lime juice for every 2 cups of yogurt what is the rate in cups of lime juice per cup of yogurt
Answer:
i think the answer is 2/5
Step-by-step explanation:
Which of the following are equivalent fractions?
2 / 3 , 4/6
Answer: 1/2
Step-by-step explanation:
:D
What is the eighth value in the sequence 768, 384, 192, 96, ...?
Answer:
6
Step-by-step explanation:
Examine this sequence. What are the relations of these values?
Every time you increase 1 term in the sequence, divide by 2.
768/2 = 384
384/2 = 192
etc.
Write a geometric sequence formula.
[tex]a_n = a*r^(^n^-^1^)[/tex]
A is the starting value (768), and r is the common ratio, or what the value is being multiplied by to get the next term. N is the term, where you can plug it in. For the eighth value, plug in 8 for n.
768 * ? = 384
1/2
r = 1/2
[tex]a_n = 768 * 1/2^(^n^-^1^)[/tex]
For finding the eighth value, plug in 8 for n.'
[tex]768 * 1/2^(^8^-^1^)[/tex]
[tex]768 * 1/2^7[/tex]
768 * 0.0078125
6
WHAT IS a^4 + b^4
Urgent!
The solution to the expression a⁴ + b⁴ is 641 when a = 2 and b = 5
How to evaluate the expressionFrom the question, we have the following parameters that can be used in our computation:
a = 2
b = 5
Also, from the question, we have
a^4 + b^4
Express the exponents in the above expression properly
So, we have the following representation
a⁴ + b⁴
Substitute the known values in the above equation, so, we have the following representation
a⁴ + b⁴ = 2⁴ + 5⁴
Evaluate the exponents
'This gives
a⁴ + b⁴ = 16 +625
Evaluate the sum
'This gives
a⁴ + b⁴ = 641
Hence, the solution is 641
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Complete question
Given that a = 2 and b = 5
WHAT IS a^4 + b^4
find the equation of a parabola whose vertex (0,0) axis yaxis ; passes through A(-1,1)
The equation of a parabola with vertex at (0, 0) and axis of symmetry along the y-axis is of the form y = ax^2. The parabola passes through the point (-1, 1), so we can set up the following equation:
y = a * x^2
1 = a * (-1)^2
Solving for a, we get a = 1. Therefore, the equation of the parabola is y = x^2.
solve the given initial-value problem. the de is homogeneous. xy2 dy dx = y3 − x3, y(1) = 2
Answer: The differential equations is
y3 3x3logx = 8x3.
Step-by-step explanation:
break the given original- value problem. The DE is homogeneous. xy2dy/ dx = y3- x3; y( 1) = 2.
result
Given a homogenous discriminational equation, xy2 dy/ dx = y3- x3
xy2dy/ dx = y3- x3
dy/ dx = ( y3- x3)/ xy2
dy/ dx = (( y/ x) 3- 1)/( y2/ x2)---( 1)
Put y/ x = v ⇒ y = xv
separatew.r.t x
dy/ dx = x.dv/ dx v
Equation( 1) becomes,
⇒ dv/ dx v = ( v3- 1)/ v2
⇒ dv/ dx = (( v3- 1)/ v2)- v
⇒ dv/ dx = ( v3- 1- v3)/ v2
v2. dv = -1/x.dx
Integrate on both sides, we get
∫ v2. dv = ∫- 1/x.dx
v3/ 3 = - logx C
1/3( y3/ x3)) log x = C( 2)
Now, given that y( 1) = 2
Substituting y = 2 and x = 1 in equation( 2)
(1/3) ×(23/13)) log 1 = C
C = 8/3
From equation( 2), we get
⇒( y3/ 3x3) logx = 8/3
thus, the needed differential equation is y3 3x3logx = 8x3.
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2x+4=12 Y=4x+12
Solve using substitution
Answer:
X=4 Y=28
Step-by-step explanation:
We have our two equations, 2x+4=12 and Y=4x+12
Solve for x of one of the equations so that the repeating (common) variable can be cancelled out.
Using 2x+4=12, we can solve for the x-value and replace it back into y.
2x+4=12
2x=8
x=4
We can replace our new x-value into the other equation, y=4x+12
y=4(4)+12
y=16+12
y=28
So x=4, and y=28
In the figure, △EBA ≅ △EDC.
Triangles E B A and E D C are connected at point E. Angles A B E and E C D are right angles. Angle A E B and D E C are congruent. Sides B E and E D are congruent.
Because CPCTC, which relationships are true?
Check all that apply.
AE ≅ CE
∠BAE ≅ ∠DCE
∠CDE ≅ ∠BAE
AB ≅ BE
AC ≅ BD
Answer:
1. works
2. works
3. does not work
4. does not work
5. does not work because it does not exist
Step-by-step explanation:
if you have room on your paper, drawing a diagram would be super helpful.
I don't know if I'm 100% right so check with other people before submitting
Answer:The answers are A and B (AE =CE, BAE=CDE)
Step-by-step explanation:
The function g is defined by g(x)= 5/x −bx^2+1, where b is a constant. Find b, if the graph of g passes through the point (−2,10).
Answer:
b = -2.875
Step-by-step explanation:
You want the value of b such that (-2, 10) is a point on the graph of g(x)= 5/x −bx²+1.
UnknownFill in the given values and solve for b.
g(-2) = 10
5/(-2) -b(-2)² +1 = 10
-2.5 -4b +1 = 10
-4b = 11.5
b = -11.5/4
b = -2.875
34×3333333 and then the answer n×454 = x
[tex]34\times3333333=n[/tex]
[tex]34\times3333333=113333322(n)[/tex]
[tex]n\times454=x[/tex]
[tex]113333322(n)\times454=x[/tex]
[tex]113333322(n)\times454=51453328188(x)[/tex]
[tex]\fbox{x = 51453328188}[/tex]
Here is a scale drawing.
The tree has a height of 22 m
Work out the height of the building.
The height of the building is 44 meters
How to determine the height of the building?From the question, we have the following parameters that can be used in our computation:
Height of the tree = 22 m
From the question, we understand that
Scale of the diagram = 2
This means that
Height of the building = Height of the tree * Scale of the diagram
Substitute the known values in the above equation, so, we have the following representation
Height of the building = 22 m * 2
Evaluate
Height of the building = 44 m
Hence, the height is 44 m
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Write an equation to represent this scenerio
You are about to take a major assessment, and each question is one two types. Multiple-choice questions are worth 2 points each, and short-response questions are worth 4 points each. The assessment is worth 100 total points. Let x represent the number of multiple-choice questions, and let y represent the number of short-response questions.
The equation to represent this scenario is 2x+4y = 100
What is an equation?
An equation is a mathematical statement that proves two mathematical expressions are equal in algebra, and this is how it is most commonly used. In the equation 3x + 5 = 14, for instance, the two expressions 3x + 5 and 14 are separated.
The worth of x number of multiple-choice questions = 2x
The worth of y number of short-response questions = 4y
Assessment is worth 100 total points.
So, the equation to represent this scenario is 2x+4y = 100
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Solve for x. Round to the nearest tenth.
X
21 27
The value of x for the given figure will be equal to √212.
What is the Pythagorean theorem?Pythagorean theorem states that in the right angle triangle the hypotenuse square is equal to the square of the sum of the other two sides. According to this statement, the areas of the squares on the other two sides add up to the size of the square whose side is the hypotenuse.
Apply the Pythagorean theorem for the first triangle,
H² = x² - 6²
Apply the Pythagorean theorem for the second triangle,
B² = 27² - x²
Apply the Pythagorean theorem to the third triangle,
H² = 27² - x² - 21²
H² = -x² + 288
x² - 6² = -x² + 288
2x² = 424
x² = 212
x=√212
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In 2015, a salesman was paid a basic monthly salary of rs 28 000. At the end of the year, he was also paid a bonus of 7 % of the value of the sales that he had made during the year. His total income for that year was Rs 441 000. Calculate the value of the sales that he made that year
Answer:
1,500,000
Step-by-step explanation:
Let's assume the value of sales that the salesman made during the year to be x.
The bonus that he received at the end of the year is 7% of the value of the sales he made. So, his bonus would be 0.07x.
Therefore, his total income for the year is his basic monthly salary plus the bonus he received. We know that his total income was Rs 441,000. Hence, we can write:
28,000 * 12 + 0.07x = 441,000
Simplifying this equation:
336,000 + 0.07x = 441,000
0.07x = 105,000
x = 1,500,000
Therefore, the value of the sales that the salesman made during the year was Rs 1,500,000.
let x as the total sales
441 000 = 12(28 000) + 0.07x
441 000 = 336 000 + 0.07x
441 000 - 336 000 = 336 000 - 336 000 + 0.07x
105 000 = .07x
x = 1 500 000
CHECKING:
12 * 28 000 = 336 000 (12 months salary)
0.07(1 500 000) = 105 000 (total sales)
336 000 + 105 000 = 441 000
Therefore, salesman total sales for the whole year is RS 1 500 000.
Step-by-step explanation:
heart and star pls <3 brainliest will be appreciated <3(っ◔◡◔)っ -{ elyna s }-Jack and Anjali each improved their yards by planting hostas and geraniums. They bought their supplies from the same nursery. Jack spent $138 on 6 hostas and 6 geraniums. Anjali spent $116 on 6 hostas and 4 geraniums. Find the cost of one geranium
Answer:
11$
Step-by-step explanation:
We will use simultaneous equation
X = hostas
Y = geraniums
6X + 6Y = 138 ----> (first equation)
6X + 4Y = 116 -----> (second equation)
(Substract)
6X + 6Y = 138
6X + 4Y = 116
2Y = 22
Y = 22/2
Y = 11$
I hope my answer helps you.
Which of these points is closest to the point (7,1)?
A
(4,1)
B
(7,-1)
C.
(7,4)
D
(11,1)
Answer:
B (7,-1)
Step-by-step explanation:
(7,-1) is 2 points away from (7,1).
(4,1) and (7,4) are both 3 points away. (11,1) is 4 points away.
That makes B (7,-1) the closest to (7,1)
V-(j+y)=61y+82
solve for y
The value of expression in terms of y is y = (v-j-82)/62
What is expression?Numbers, symbols and operators (such as and times) grouped together that show the value of something.
Given that an expression v-(j+y)=61y+82
Solving for y,
v-(j+y)=61y+82
v-j-y = 61y+82
v-j-82 = 61y+y
v-j=92 = 62y
y = (v-j-82)/62
Hence, The value of expression in terms of y is y = (v-j-82)/62
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The coordinates of points a and b are a(2, 16) and b(22, 4). what are the coordinates of the point that is 34 of the way from a to b?
The coordinates of the point is (17, 7)
How to determine the coordinates of the point?From the question, we have the following parameters that can be used in our computation:
Point A = (2, 16)
Point B = (22, 4)
Ratio = 3/4
The ratio can be expressed as
m : n = 3 : 1
The coordinates of the point can be calculated as
Point = 1/(m + n) * (mx2 + nx1, my2 + ny1)
Substitute the known values in the above equation, so, we have the following representation
Point = 1/(3 + 1) * (3 * 22 + 1 * 2, 3 * 4 + 1 * 16)
So, we have
Point = 1/4* (68, 28)
So, we have
Point = (17, 7)
Hence, the point is (17, 7)
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Reggie picked 32 apples in 4 minutes. What is the unit rate?
Answer:
8
Step-by-step explanation:
Based on the given conditions, formulate: 32 / 4 Cross out the common factor
a girl flies a kite at a height of 300 ft, the wind carrying the kite horizontally away from her at a rate of 25 ft/sec(the height stays constant). how fast she let out the string when 500 ft of string has been let out?
The 20 ft/sec is the timing of the string when 500 ft of string has been let out for the kite at a height of 300 ft, the wind carrying the kite horizontally away from her at a rate of 25 ft/sec.
Let dd be the real distance among the kite and the female, vv be the vertical distance among the female and the kite, and hh horizontal distance. Since the vertical distance is a constant (v = 300v=300) we understand that:
v^2 + h^2 = d^2 quad Rightarrow quad 300^2 + h^2 = d^2v 2 +h 2 =d 2 ⇒300 2 +h 2 =d 2
wherein dd and hh are capabilities of time tt, this means that that:
2hdfrac = 2ddfrac2h dtdh =2d dtdd
Since the vertical distance is v=300v=300, and the real distance is d = 500d=500, we understand that:
300^2 + h^2 = 500^2 quad h = sqrt = 400300 2 +h 2 =500 2 ⇒h= 500 2 −300 2 =four hundred
We're inquisitive about the price of extrade of the real distance dd so we have:
begin color dfrac &= dfrac cdot h cdot dfrac = dfrac cdot four hundred cdot 25 = color 20 text enddtdd = d1 ⋅h⋅ dtdh = 5001 ⋅four hundred⋅25=20 ft/sec
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need help asap! 100 points
also the option for "This interpretation ___ in the context of the problem."
is "Makes sense" and "Does Not Make sense"
and for "Based on the observations above, it is clear that an appropriate domain for the function is ______"
is: all real numbers
non negative real numbers
real numbers in a a
whole numbers (0,1,2,....)
positive integers (0,1,2,3,....)
integers in a
What is the function?
The function in this problem is defined as follows:
f(x) = 6x - 1.
Giving how many points a player is awarded when a dice of x is rolled.
The possible values at which the dice can land is up:
1,2,3,4,5,6.
Then the numeric values of the function are calculated replacing x by their values.
The only inputs that make sense are 1,2,3,4,5,6, as they are the values at which the dice can land. For example, a dice cannot land on neither 5.5 nor 10.
Missing Information
The function in this problem is defined as follows:
f(x) = 6x - 1.
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An airplane can level 1,500 miles in 4.5 hours at a constant speed how long will it take the airplane to travel 200 miles
Answer: 0.6 hours
Step-by-step explanation:
We will set up a proportion to help us solve.
[tex]\displaystyle \frac{1,500\; \;miles}{4.5\;\;hours} =\frac{200\;\;miles}{x\;\;hours}[/tex]
Next, we will cross-multiply and solve by multiplying and using inverse operations.
1,500 * x = 200 * 4.5
1,500x = 900
x = 0.6 hours
Multiply. Write your answer as a fraction in simplest form.6x5/9
Answer:
10/3
Step-by-step explanation:
6 × 5 ÷ 9 = 30/9
However, you will realize that the numerator (30) and denominator (9) both are multiples of 3. That means we can divide the numerator and denominator by 3 to get an equivalent fraction:
(30 ÷ 3)/(9 ÷ 3) = 10/3
Therefore, the answer is 10/3
Parallel and perpendicular through points
The equation of the line that passes through the point (6,-4) and is perpendicular to the line 2x - y = 5 is 5y + x = -14.
What is a line?An object having an endless length and no width, depth, or curvature is called a line. Since lines can exist in two, three, or higher-dimensional environments, they are one-dimensional things.
Given:
Point (6,-4),
2x - y = 5,
Calculate the slope as the line is perpendicular to line 2x - y = 5
m = 2
The slope of the line perpendicular, m = - 1 / 5
Calculate the equation of the line as shown below,
[tex]y - (-4) = - 1 / 5 (x - 6)[/tex]
5 (y + 4) = -x + 6
5y + 20 = -x + 6
5y + x = -14
Therefore, the equation of the line that passes through the point (6,-4) and is perpendicular to the line 2x - y = 5 is 5y + x = -14.
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The complete question is:
What is an equation of the line that passes through the point (6,-4) and is perpendicular to the line 2x - y = 5?
Find the measure of <1
A. 30 degree
B. 122 degree
C. 92 degree
D. 58 degree
Help!!!
(Picture is provided)
Answer: D. 58 degree
Step-by-step explanation:
A triangle has a total of 180 degrees
92 + 30 = 122 degree
180 - 122 = 58 degree
So, the answer is D. 58 degree
WILL GIVE BRAINLIST AND EXTRA POINTS TO BEST ANSWER PLEASE HLEP
7. Melanie bought some pizza for $2.50 per pound and hot dogs for $1.50 per pound. She spent a total of $30. Use the graph below to sketch all the possible combinations of pizza, p, and hot dogs, h, Melanie could have bought?
The solutions for the number of pizzas p and hot dogs h is
a) A ( p , h ) = A ( 0 , 20 )
b) B ( p , h ) = B ( 3 , 15 )
c) C ( p , h ) = C ( 6 , 10 )
d) D ( p , h ) = D ( 9 , 5 )
e) E ( p, h ) = E ( 12 , 0 )
What is an Equation of a line?
The equation of a line is expressed as y = mx + b where m is the slope and b is the y-intercept
And y - y₁ = m ( x - x₁ )
y = y-coordinate of second point
y₁ = y-coordinate of point one
m = slope
x = x-coordinate of second point
x₁ = x-coordinate of point one
The slope m = ( y₂ - y₁ ) / ( x₂ - x₁ )
Given data ,
Let the equation of line be represented as A
Now , the value of A is
Let the number of pizza be = p
Let the number of hot dog = h
The cost of one pizza be = $ 2.50
The cost of one hot dog = $ 1.50
Now , the total amount with Melanie = $ 30
So , the equation will be
2.50p + 1.50h = 30
On simplifying the equation , we get
2.5p + 1.5h = 30 be equation (1)
Multiply equation (1) by 10 , we get
25p + 15h = 300
Now , the values of p and h which will satisfy the equation is
a)
Let p = 0 , h = 20
The equation is 25p + 15h = 300
Substitute the value of p and h , we get
25 ( 0 ) + 15 ( 20 ) = 300
300 = 300
So , the point A ( 0 , 20 ) satisfies the equation
b)
Let p = 3 , h = 15
The equation is 25p + 15h = 300
Substitute the value of p and h , we get
25 ( 3 ) + 15 ( 15 ) = 300
75 + 225 = 300
300 = 300
So , the point B ( 3 , 15 ) satisfies the equation
c)
Let p = 6 , h = 10
The equation is 25p + 15h = 300
Substitute the value of p and h , we get
25 ( 6 ) + 15 ( 10 ) = 300
150 + 150 = 300
300 = 300
So , the point C ( 6 , 15 ) satisfies the equation
d)
Let p = 9 , h = 5
The equation is 25p + 15h = 300
Substitute the value of p and h , we get
25 ( 9 ) + 15 ( 5 ) = 300
225 + 75 = 300
300 = 300
So , the point D ( 9 , 5 ) satisfies the equation
e)
Let p = 12 , h = 0
The equation is 25p + 15h = 300
Substitute the value of p and h , we get
25 ( 12 ) + 15 ( 0 ) = 300
300 = 300
So , the point E ( 12 , 0 ) satisfies the equation
Hence , The solutions for the number of pizzas p and hot dogs h is
a) A ( p , h ) = A ( 0 , 20 )
b) B ( p , h ) = B ( 3 , 15 )
c) C ( p , h ) = C ( 6 , 10 )
d) D ( p , h ) = D ( 9 , 5 )
e) E ( p, h ) = E ( 12 , 0 )
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Are the following compound statements are logically equivalent P ∧ Q ∨ Q and P ∨ Q?
Answer:
Step-by-step explanation:
This has some significance in logic because if two propositions have the same truth table they are in a logical sense equal to each other – and we say that they are logically equivalent. So: ¬p∨(p∧q)≡p→q, or "Not p or (p and q) is equivalent to if p then q."
...
Logically Equivalent Statements.
p q p→q
F F T
I'LL GIVE BRAINLIEST!!
Jessica is building a fence around her garden. For every 3 feet of fencing, the cost is $27. Complete the table below showing the length of the fence and the cost.
Answer:
1, 54, 9, 90
Step-by-step explanation:
3ft=27$, so 1ft=9$. The constant of proportionality is 9 from feet to money so multiply the rest by 9 to get 54, divide backwards to get 9, and then multiply 10 by 9 to get 90.
Answer:
Length : 6 9 10
Cost ($) :54 81 90
Step-by-step explanation:
First, divide 27 by 3 to find the cost of 1 feet fence.
We get the answer 9
Then, to find the length, divide the cost by 9
And to find the cost, multiply the length of fence with 9.
Simple!
(btw I came here for the brainliest especially, so I hope you keep your word:) And hope this helped!)
What is the absolute value of the integer -(-22)?(It is -(-22), not -22).
Answer:
22
Step-by-step explanation:
Knowledge Needed
| | (absolute value) = Makes anything inside positive after solving.
A negative number multiplied or divided by another negative number is positive.
Question
Set up the equation
| -(-22) |
| 22 |
Stays positive.
22