Answer:
Step-by-step explanation:
The answer is B
The whole numbers are the + integer set. Since -sqrt(25) = - 5, this number is not included in the whole number set.
Proceed as in this example to find a particular solution
yp(x)
of the given differential equation in the integral form
yp(x) =
x
G(x, t) f(t) dt.
x0
y'' + 2y' + y = f(x)
yp(x) =
x
f(t) dt
x0
Answer:
The integral form of the given differential equation is:
yp(x) = x * ∫[x0 to x] G(x, t) * f(t) dt
where G(x,t) is the Green's function for the differential equation, which depends on the specific form of the equation and the boundary conditions.
To find the Green's function, we first solve the homogeneous equation y'' + 2y' + y = 0, which has the characteristic equation r^2 + 2r + 1 = 0. This has a double root of -1, so the general solution to the homogeneous equation is yh(x) = c1e^(-x) + c2x*e^(-x).
Next, we need to find a particular solution to the non-homogeneous equation y'' + 2y' + y = f(x). We can use the method of undetermined coefficients to guess a particular solution of the form yp(x) = A*x, where A is a constant. Taking the first and second derivatives of yp(x), we get yp'(x) = A and yp''(x) = 0. Substituting these into the differential equation, we get:
0 + 2A + Ax = f(x)
Solving for A, we get A = (1/x) * ∫[x0 to x] f(t) dt.
Therefore, the general solution to the non-homogeneous equation is y(x) = yh(x) + yp(x) = c1e^(-x) + c2xe^(-x) + (1/x) * ∫[x0 to x] G(x, t) * f(t) dt, where G(x,t) = e^(-(x-t)) - e^(-(x-t))(x-t).
Using this expression for yp(x), we can now substitute it into the integral form of the differential equation to get:
yp(x) = x * ∫[x0 to x] (e^(-(x-t)) - e^(-(x-t))*(x-t)) * f(t) dt
Therefore, the solution to f(x) = g(x) is x = 1.
Step-by-step explanation:
Graph the data in the table
How many vertices dose the following shape have?
Answer:
If you have more than one vertex they are called vertices. You can also count the number of vertices in order to identify solid figures. Let's look at an example. When you count the number of vertices in the figure above you see there are 7 vertices.
Suppose that 40% of all cars in a certain town are white. A person stands at an intersection waiting for a white car. Let x=the number of cars that must drive by until a white car drives by. What is the probability that a white car will drive by before x=5?
The probability that a white car will drive by before x=5 is 87.04%
The probability that a white car will drive by before x=5 is equal to the probability that the first white car will appear on the first, second, third, or fourth car.
The probability that the first white car will appear on the first car is 40%.
The probability that it will appear on the second car is (1-40%)40% = 24%. The probability that it will appear on the third car is (1-40%)(1-40%)40% = 14.4%.
The probability that it will appear on the fourth car is (1-40%)(1-40%)*(1-40%)*40% = 8.64%.
The total probability that the first white car will appear on any of the first four cars is 40% + 24% + 14.4% + 8.64% = 87.04%.
Therefore, the probability that a white car will drive by before x=5 is 87.04%.
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a simple random sample of size n is obtained from a population whose size is and whose population proportion with a specified characteristic is describe the sampling distribution of . round the standard deviation of the sampling distribution to three decimal places.
The sampling distribution of is a binomial distribution with parameters n and p, where n is the sample size and p is the population proportion of the specified characteristic.
The mean of the sampling distribution is np and the standard deviation is \($\sqrt{np(1-p)}$\).
Sampling Distribution of a Simple Random SampleRound the standard deviation to three decimal places, it is \($\sqrt{np(1-p)}$ = $\sqrt{n \cdot p \cdot (1-p)} \approx \sqrt{n \cdot p \cdot 0.99}$\).
The sampling distribution of is a binomial distribution with parameters n and p, where n is the sample size and p is the population proportion of the specified characteristic. The mean of the sampling distribution is np and the standard deviation is \($\sqrt{np(1-p)}$\). This means that for a given sample size n and population proportion p, the standard deviation of the sampling distribution can be calculated by taking the square root of the product of n, p, and (1-p).
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Which of the following represents a point on the circle in center radius form (x-h)^ 2 + (y - k) ^ 2 = r ^ 2
Given the equation of the circle in center radius form:
\((x-h)^2+(y-k)^2=r^2\)From the equation, we can conclude the following:
1) Center = (h, k)
2) radius = r
3) any point on the circle = (x, y)
So, the answer will be option 4) (x,y)
A bike wheel is 26 inches in diameter. What is the bike wheel's diameter in millimeters
Answer:
660.4 Millimeters
Step-by-step explanation:
The conversion for inches to millimeters is 25.4, therefore to get the answer. I multiplied 26 by 25.4
25 8 25.4 = 660.4 Millimeters
PLS HELP! it’s question 12
Answer:
yes
Step-by-step explanation:
it is going by 5s.
Answer:
Yes. This is because if you plot the numbers on a ration table or see the graph points, you can see a pattern: you multiply by 5. The equation to solve this would be y=5x. Another reason why this is proportional is that the graph starts from the origin (0,0) This is the opposite for non-proportional relationships. Hope this helps! :)
Find the center and radius of the circle represented by the equation below.
Answer:
centre = (5, - 6 ) , radius = 7
Step-by-step explanation:
the equation of a circle in standard form is
(x - h)² + (y - k)² = r²
where (h, k ) are the coordinates of the centre and r is the radius
given
x² + y² - 10x + 12y + 12 = 0 ( subtract 12 from both sides )
x² + y² - 10x + 12y = - 12 ( collect terms in x/ y )
x² - 10x + y² + 12y = - 12
using the method of completing the square
add ( half the coefficient of the x/ y terms )² to both sides
x² + 2(- 5)x + 25 + y² + 2(6)y + 36 = - 12 + 25 + 36
(x - 5)² + (y + 6)² = 49 = 7² ← in standard form
with centre (5, - 6 ) and radius = 7
Answer:
Center = (5, -6)
Radius = 7
Step-by-step explanation:
To find the center and the radius of the circle represented by the given equation, rewrite the equation in standard form by completing the square.
To complete the square, begin by moving the constant to the right side of the equation and collecting like terms on the left side of the equation:
\(x^2-10x+y^2+12y=-12\)
Add the square of half the coefficient of the term in x and the term in y to both sides of the equation:
\(x^2-10x+\left(\dfrac{-10}{2}\right)^2+y^2+12y+\left(\dfrac{12}{2}\right)^2=-12+\left(\dfrac{-10}{2}\right)^2+\left(\dfrac{12}{2}\right)^2\)
Simplify:
\(x^2-10x+(-5)^2+y^2+12y+(6)^2=-12+(-5)^2+(6)^2\)
\(x^2-10x+25+y^2+12y+36=-12+25+36\)
\(x^2-10x+25+y^2+12y+36=49\)
Factor the perfect square trinomials on the left side:
\((x-5)^2+(y+6)^2=49\)
The standard equation of a circle is:
\(\boxed{(x-h)^2+(y-k)^2=r^2}\)
where:
(h, k) is the center.r is the radius.Comparing this with the rewritten given equation, we get
\(h = 5\)\(k = -6\)\(r^2 = 49 \implies r=7\)Therefore, the center of the circle is (5, -6) and its radius is r = 7.
Which can be represented using the product (50) × (-5) ?
O saving $5 each day for 50 days
O a submarine rising by 50 feet each hour for 5 hours
O earning $50 each month for 5 months
O an airplane losing altitude by 5 feet each second for 50 seconds
Answer: D
Step-by-step explanation:
what percent of the population has an IQ score a live 130?
Trenton sells electricsupplies. Each week he earns$190 plus a commission equal to$1.50 for every item sold. Thisweek, his goal is to earn no lessthan $550. Write and solve aninequality to find the amount ofsales he must have to reach hisgoal.
Trenton earnings are $190/week + $1.50/item sold.
Let x represent the number of items he sold and y represent his total earnings then:
y=190+1.50x
This means that in a bad week, if he sells no items (x=0) he will earn $190, and each time he sells one item (x increases one unit) he earns + $1.50
If his goal is to earn $550, you hace to replace y=550 in the formula and solve it for x:
\(\begin{gathered} y=190+1.50x \\ 550=190+1.50x \\ 1.50x=360 \\ x=\frac{360}{1.50} \\ x=240 \end{gathered}\)To earn $550 Trenton needs to sell 240 items
The table below shows the number of jumping jacks completed after a given period of time in minutes.
Considering the jumping jacks: 50, 100, 150, 200, what is the common difference?_____.
Now, think of this table as a set of ordered pairs. This means that the first row can be placed in an ordered pair as (1, 50). The second row can be written as (2, 100). Using this, what is the slope of the line that connects the first two points? _______.
What is the slope of the line that connects the 3rd and 4th point?_________.
What is the slope of the line that connects the 1st and the 4th point?________.
Is the common difference (aka slope aka rate of change) constant? _________.
Why is it or is it not constant? _______.
1. Considering the jumping jacks: 50, 100, 150, and 200, the common difference is 50.
2. Using this ordered pair (1, 50), the slope of the line that connects the first two points is 50.
3. The slope of the line that connects the 3rd and 4th points (3, 150) and (4, 200) is 50.
4. The slope of the line that connects the 1st and the 4th point is 50.
5. The common difference (aka slope aka rate of change) is constant.
6. The slope is constant because it increases by 50 from one point to the next.
What is the slope?The slope is the common difference or rate of change from one data point to the next.
We can compute the slope as the change in y divided by the change in x or rise over run.
For instance, between point 1 and point 2:
Rise = y2 - y1
Run = x2 - x1
Where y2 = 100, y1 = 50, x2 = 2, and x1 = 1.
Slope = y2 - y1 ÷ x2 - x1
= 100 - 50 ÷ 2 - 1
= 50
Check:
Slope = y4 - y3 ÷ x4 - x3
= 200 - 150 ÷ 4 - 3
= 50
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read and solve each problem learning task 2 page 23 week 5 and learning task 3
eden bought 2 1/4 meter of cloth. She uses 3/4 of meter for her project.how many meters of cloth did she have left
Rina bought 51/4 meter of cloth. She uses 3 3/4 of meter for her project.how many meter of cloth dis she have left
Answer:
1 1/4
1 1/2
Step-by-step explanation:
Given that :
Length of cloth purchased = 2 1/4
Length used for project = 3/4
Length remaining = (length purchased - length used)
= 2 1/4 - 3/4
= (9/4 - 3/4)
= (9 - 4) / 4
= 5/4
= 1 1/4
Length of cloth purchased = 5 1/4
Length used for project = 3 3/4
Length remaining = (length purchased - length used)
= 5 1/4 - 3 3/4
= 21/4 - 15/4
= (21 - 15) / 4
= 6/4
= 1 2/4
= 1 1/2
I solved it myself and my result is (n+1)/n. Why is that 1/2 there? An explanation would be great if possible. Thanks!
Answer:
The product of (k + 1) series starts with 3 (because k = 2) and you need 2 to be multiplied to this in order to get (n + 1)!
Therefore you need to multiply 2 and 1/2 to make it right. 2 completes the factorial and 1/2 remains.
Hope it was clear explanation.
Which is greater 3/10 or 3/100
Answer:
3/10ths is bigger
Step-by-step explanation:
Help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
B
Step-by-step explanation:
Calculate the volume, in cubic centimeters, of a box which is 125 cm long, 37 cm wide, and 68 cm high. Report your answer with correct significant figures in cubic centimeters.
Answer:
\(Volume = 314500cm^3\)
Step-by-step explanation:
Given
\(Length = 125cm\)
\(Width = 37cm\)
\(Height = 68cm\)
Required
Determine the volume
Volume is calculated as:
\(Volume = Length * Width * Height\)
Substitute values for Length, Width and Height
\(Volume = 125cm * 37cm * 68cm\)
\(Volume = 314500cm^3\)
Hence, the volume of the box is \(314500cm^3\)
Factor 4x^2-22x+30.
Answer:
4x^2-22x+30
=2(2x^2 - 11x + 15)
=2(2x^2 -6x -5x +15)
= 2 { 2x(x-3) - 5(x-3) }
= 2 (x-3) (2x - 5)
Step-by-step explanation:
Hey, there!!!
The answer is option B
here, we have;
=4x^2-22x+30
=4x^2-(10+12)x+30
= 4x^2-10x-12x+30
now, taking common,
=2x(2x-5) -6(2x-5)
= 2(x-3)(2x-5).
Hope it helps
If possible factor. Find LCD. Multiply both sides by LCD. Solve show all work.
The lowest common denominator of the fraction is 6
What is LCDThe lowest common denominator (LCD) is the smallest common multiple of the denominators of a set of fractions. It is used to add or subtract fractions with different denominators.
The LCD of a set of fractions is the smallest number that is divisible by all the denominators in the set. When all the denominators are divided into the LCD, each fraction has an equivalent fraction with the same value and a denominator equal to the LCD.
In the fraction given;
x / 3 + x / 2 = 20
The lowest common denominator is 6
Using 6, we can divide through each of the fraction.
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I need help!!!! pleaseee
The genotype ratio is: 1 TT : 1 Tt : 0 tt
The phenotype ratio is : 4 Tall : 0 Short
100 percent of the offspring will be tall.
What is Genotypic and Phenotypic ratio?Genotypic ratio is the ratio between the genetic makeup among the offspring population.
On the other hand, the ratio between the offspring population for an observable characteristic is the phenotype ratio.
The given test cross is between a homozygous tall parent and a heterozygous tall parent.
Using a Punnett square,
The result will be as shown below.
T t
T TT Tt
T TT Tt
Genotype : 1 TT : 1 Tt : 0 tt
Phenotype : 4 Tall : 0 Short
100 percent of the offspring will be tall.
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4x-5 2x+7 Find the value of x
answers should be from
27
37
47
57
The diagram below shows rectangle ABC is a midtsin of
BC, such that D,E and F are on the same line API AD
i = 53, 13" BE-sm
and DE 2 EF
84
2176
F
with reasons
3.1 Prove
AB - BF
3.2. Calculate AD
3.3 Complece. In are rigter angled A BEF, son 53, 13" - BE
Answer:
4x2+3=
Step-by-step explanation:
Would really appreciate if someone helped me with this one please!
a) The value of x is 21
b) The value of the expression is 135.
c) The value of the expression is 135.
How to find the value of x?Here we know that the lines G and M are parallel, meaning that the two shown angles are alternarte exterior angles, and thus, have the same measure, then we can write:
5*(x + 6) = 9*(x - 6)
We can solve that linear equation for x:
5x + 30 = 9x - 54
30 + 54 = 9x - 5x
84 = 4x
84/4 = x
21 = x
Then the measures of the angles are:
a1 = 5*(21 + 6) = 135°
a2 = 9*(21 - 6) = 135°
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#1 (7.6)
ABXC is a right triangle where mzXBC-90°, mzCXB-60°, and XB-5. Determine the length
of each side. Leave your answer as an exact answer.
1. Draw the triangle and label the given parts
2. Identify side types:
30-60-90 has hypotenuse, short, long
45-45-90 has hypotenuse, leg, leg
3. Write the formulas for the special right triangle. Plug in your values and solve.
To enter a square root answer, type the number outside and the number inside using the two
boxes provided. For example, 7√2 would look like 7
Length
Side
CB (long)
XB (hypotenuse)
The the length of each side of the triangle are: 5 units, 8.7 units and 10 units respective
What is a triangle?A triangle is a polygon with three sides, three angles, three vertices and sum of angles equal to 180 degrees
From the triangle, Using the trigonometric ratio of sine
Sin C = opposite/Hypothenuse
Sin30 = 5/H
Making h the subject of the relation we have
h= 5/sin30
h=5/0.5
Therefore the value of h=10 units
To find the third side use Pythagoras theorem
10² = 5²+p²
100-25 = p²
75 = p²
Taking the square of both sides
p=√75
p=8.7 units
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X-1 3/4= 3/4
I do not understand it pls help I need the working to
Answer:
2 1/2
Step-by-step explanation:
To Find x It the same things as 1 3/4 + 3/4 = x.
Look in the picture for the work or below:
Add \(\frac{7}{4}\) to both sides of the equation
\(x-\frac{7}{4}+\frac{7}{4}=\frac{3}{4}+\frac{7}{4}\)
Simplify
\(\frac{5}{2}\)
\(\frac{5}{2}=2\frac{1}{2}\)
Answer:
\(x = 2\frac{1}{2}\) or \(2.5\)Step-by-step explanation:
\(x - 1\frac{3}{4} =\frac{3}{4}\)
\(x =\frac{3}{4} + 1\frac{3}{4}\)
\(x =\frac{3}{4} + \frac{7}{4}\)
\(x = \frac{3+7}{4}\)
\(x=\frac{10}{4}\)
\(x = \frac{5}{2}\)
\(x = 2\frac{1}{2}\) or \(2.5\)
Question 2 (1 point)
How much does the prefix milli multiply the value of a base unit?
Answer:1000
Step-by-step explanation:
What is the value of 6(2b-4) when b=5?
Answer:
36
Step-by-step explanation:
6[(2×5)-4]
6(10-4)
6(6)
=36
Answer:
36
Step-by-step explanation:
6(2b-4) where b=5
= 6(2(5)-4)
= 6(10-4)
= 6(6)
= 36
If f(x) = x3+ x2and g(x) = x4+ x2+ x, what is the value of f(x) –g(x) when x = 1?
A) -2
B) -1
C) 1
D) 5
Answer:
B) -1Step-by-step explanation:
\(f(x)=x^3+x^2\\\\g(x)=x^4+x^2+x\)
METHOD 1\(f(x)-g(x)=(x^3+x^2)-(x^4+x^2+x)=x^3+x^2-x^4-x^2-x\\\\=-x^4+x^3-x\\\\x=1\\\\-1^4+1^3-1=-1+1-1=-1\)
METHOD 2\(x=1\\\\f(1)=1^3+1^2=1+1=2\\\\g(1)=1^4+1^2+1=1+1+1=3\\\\f(1)-g(1)=2-3=-1\)
When making bread from scratch, the recipe calls for 3/4 cup of water. If you need to make a smaller portion of the recipe, how much water would you need in order to make only 1/9th of the recipe?
Answer:0.67
Step-by-step explanation: