Answer:
Step-by-step explanation:
Measure the angle between the lines
It should be 90 degrees,
How many solutions can be found for the equation 4z 2(z − 4) = 3z 11? none one two infinitely many
There is only one solution for the equation 4z + 2(z -4) = 3z + 11 because the exponent for the power of z is 1.
What is an equation?In mathematics, an equation is a formula that expresses the equality of two expressions, by connecting them with the equals sign =.
What is the Solution?A solution is any value of a variable that makes the specified equation true.
According to the given information:
4z + 2(z-4)= 3z+11
Solve the equation,
4z+2z-8=3z+11
6z-3z=11+8
3z =19
z=
Hence,
Number of solution that can be found for the equation 4z + 2(z-4)= 3z+11 is option(2) one
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Assume thst y varies directly with x then solve if y=4 when x=12 find y when x=-24
Answer:
-8
Step-by-step explanation:
y=(1/3)x
4 = (1/3)12
y=(1/3)(-24)
y= -8
JOAL is a parallelogram. Find the length of OA.
Answer:
OA=95
Step-by-step explanation:
JL = 19Z = OA = 4Z+75
19Z = 4Z+75
19Z-4Z=75
15Z=75
Z=75÷15
Z=5
OA=4(5)+75
OA=95
btw, u stan blackpink? i cant wait for their next comeback "BORN PINK"
Calculate the amount of heat (in kJ) released when 3.5 mol CH4 react. 4() + 22() → 2() + 22() + 890
The amount of heat (in KJ) released when 3.5 moles of CH₄ react is 3115 KJ
Balanced equationCH₄ + 2O₂ -> CO₂ + 2H₂O ΔH = 890 KJ
From the balanced equation above,
1 mole of CH₄ reacted to release 890 KJ of heat energy.
How to determine the heat energy released by 3.5 moles of CH₄From the balanced equation above,
1 mole of CH₄ reacted to release 890 KJ of heat energy
Therefore,
3.5 moles of CH₄ will react ro release = 3.5 × 890 = 3115 KJ of heat energy
Thus, 3115 KJ of heat energy were released from the reaction
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Using synthetic division what is (3x² + 7x - 18) = (x - 3)
Answer:
3x + 16 + 30/x - 13
Step-by-step explanation:
help help help help help help help help help help help
Solving the quadratic equation we conclude that:
The maximum height is 45ft.The rocket is 18 seconds in the air.How to get the maximum height of the rocket?
The height of the rocket is defined by the quadratic equation:
[tex]d = 90t - 5t^2[/tex]
The maximum height is what we get in the vertex of the quadratic equation, such that for this quadratic equation, the vertex is at:
[tex]t = -90/(2*-5) = 9[/tex]
So the maximum height is what we get when we evaluate in t = 9:
[tex]d = 90*9 - 5*9^2 = 45[/tex]
The maximum height is 45ft.
How to get the time in the air?Now we need to solve the equation for the largest value of t:
[tex]d = 90*t - 5t^2 = 0[/tex]
Rewriting it, we get:
[tex]0 = 90*t - 5*t^2\\\\0 = t*(90 - t*5)[/tex]
The maximum solution is what we get when:
0 = 90 - t*5
t = 90/5 = 18
The rocket is 18 seconds in the air.
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QPS=
Help me please! Thankss
Answer:
44°
Step-by-step explanation:
[tex]\frac{134-46}{2}=44[/tex]
.
Please help me. i dont get it
Step-by-step explanation:
let's say one integer is X ....
so , Another one is (X -4).....
so , X × (X - 4) = 45
x² - 4x - 45 = 0
x² - 9x + 5x - 45 = 0
x(x - 9) +5(x - 9) = 0
(x-9) × (X+5) = 0
x-9 = 0 OR x+5 = 0
X= 9 X= -5
X is not a negative integer ......
so , X = 9
X-4 = 5 .......
someone please help i will give brainliest
From the two functions function 2 has the highest maximum value.
Given two functions,one is y=-[tex]x^{2} -2x-2[/tex] and f(-2)=1,f(-1)=6,f(0)=9,f(1)=10,f(2)=9,f(3)=6.
We ae required to choose a function which is having highest maximum possible value.
Function is like a relationship between two or more variables expressed in equal to form. Each value of x of a function has some value of y.
The highest value in the second function is 10 which is at x=1. Put the value of x=1 in y=-[tex]x^{2} -2x-2[/tex].
y=-1-2-2
y=-5
So it might not be highest value of this function.So the second function has highest maximum value of 10 at x=1.
Hence the second function has highest value.
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Two trains leave the station at the same time, one heading west and the other east. The westbound train travels at miles per hour. The eastbound train travels at miles per hour. How long will it take for the two trains to be miles apart
Answer:
one hour
Step-by-step explanation:
if they are going the same speed going differnet directions they will be 2 miles apart after one hour
In a charity triathlon, Mark ran half the distance and swag a quarter of the distance. When he took a quick break to get a drink of Gatorade, he was just starting to bike the remaining 17 miles. What was the total distance of the race?
Answer:
68 miles
Step-by-step explanation:
The total distance can be determined from the fractions.
SolutionLet d represent the total distance of the race.
The distance running is 1/2d. The distance swimming is 1/4d. The remaining distance is 17 miles.
Remaining = total distance - distance running - distance swimming
17 mi = d -1/2d -1/4d = 1/4d . . . . . . . . use known fractions
68 mi = d . . . . . . . multiply by 4
The total distance of the race is 68 miles.
__
Additional comment
This would be a very difficult race. A typical "iron man" race has a swimming distance under 2.5 miles, less than 1/10 of the distance running. The biking distance is typically about 4 times the running distance of "only" 26 miles. An iron man race can take about 17 hours to complete.
This race has a 17-mile swimming segment, which would take a fast swimmer on the order of 8 hours, by itself. (This is 2.7 times the length of a "marathon" swim.) Here, the running distance is 34 miles, about 30% longer than a marathon.
What are the values of a such that the average value of f(x) = 1 2x − x 2 on [0, a] is equal to 1?
The average value of the given function is [tex]f_{avg} = \frac{-2a^{2} + 6a + 6 }{6}[/tex].
According to the statement
we have given that the function f(x) and we have to find the average value of that function.
So, For this purpose, we know that the
The given function f(x) is
[tex]f(x) = -x^{2} + 2x +1[/tex]
And now integrate this function with the limit 0 to a then
[tex]f_{avg} = \frac{1}{b - a} \int\limits^a_0 {f(x)} \, dx = -x^{2} + 2x +1[/tex]
Now integrate this then
[tex]f_{avg} = \frac{1}{a} \int\limits^a_0 {-x^{2} + 2x +1} \, dx[/tex]
Then the value becomes according to the integration rules is:
[tex]f_{avg} = \frac{1}{a} \int\limits^a_0 {-\frac{x^{3} }{3} + \frac{2x^{2} }{2} +x} \,[/tex]
Now put the limits then answer will become as output is:
[tex]f_{avg} = \frac{1}{a} [ {-\frac{a^{3} }{3} + \frac{2a^{2} }{2} +a} \,][/tex]
Now solve this equation then
[tex]f_{avg} = [ {-\frac{a^{2} }{3} + \frac{2a }{2} +1} \,][/tex]
Now
[tex]f_{avg} = \frac{-2a^{2} + 6a + 6 }{6}[/tex]
This is the value which represent the average of the given function in the statement.
So, The average value of the given function is [tex]f_{avg} = \frac{-2a^{2} + 6a + 6 }{6}[/tex].
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Given the following coordinates complete the reflection transformation.
A(1,−5)
B(2,−2)
C(5,−2)
Transformation: Complete the double reflection over the lines y=−1 followed by y=1.
The double reflection generates the following three points: A''(x, y) = (1, - 1), B''(x, y) = (2, 2) and C''(x, y) = (5, 2).
How to generate a set of point by rigid transformations
In this problem we must apply two rigid transformations to find three points. The formula for reflection over an axis parallel to the y-axis is defined below:
P'(x, y) = (x', k) - [P(x, y) - (x', k)] (1)
Where:
x' - x-coordinate of the point P(x, y).P(x, y) - Original pointP'(x, y) - Resulting pointIf we know that A(x, y) = (1, - 5), k = - 1 and k' = 1, then the resulting points are:
Point A
A'(x, y) = (1, - 1) - [(1, - 5) - (1, - 1)]
A'(x, y) = (1, - 1) - (0, - 4)
A'(x, y) = (1, 3)
A''(x, y) = (1, 1) - [(1, 3) - (1, 1)]
A''(x, y) = (1, 1) - (0, 2)
A''(x, y) = (1, - 1)
Point B
B'(x, y) = (2, - 1) - [(2, - 2) - (2, - 1)]
B'(x, y) = (2, - 1) - (0, - 1)
B'(x, y) = (2, 0)
B''(x, y) = (2, 1) - [(2, 0) - (2, 1)]
B''(x, y) = (2, 1) - (0, - 1)
B''(x, y) = (2, 2)
Point C
C'(x, y) = (5, - 1) - [(5, - 2) - (5, - 1)]
C'(x, y) = (5, - 1) - (0, - 1)
C'(x, y) = (5, 0)
C''(x, y) = (5, 1) - [(5, 0) - (5, 1)]
C''(x, y) = (5, 1) - (0, - 1)
C''(x, y) = (5, 2)
The double reflection generates the following three points: A''(x, y) = (1, - 1), B''(x, y) = (2, 2) and C''(x, y) = (5, 2).
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Select the statement that describes this expression: 10 + fraction 1 over 4x (5 + 3) − 3.
A) 10 more than fraction 1 over 4 of the sum of 5 and 3, then subtract 3
B) fraction 1 over 4 of 10 times the sum of 5 and 3, minus 3
C) 3 more than 3 plus 5 multiplied by fraction 1 over 4, then add 10
D) 10 times fraction 1 over 4 plus 3 and 5, minus 3
Answer:
B
Step-by-step explanation:
because i said so
Micah drew a map of his neighborhood. the actual distance from his house to the school is 5.75 miles. what is the actual distance from the library to the park?
The scale factor is 2.875 miles per inch. Then the actual distance from the library to the park will be 2.875 miles.
What is dilation?Dilation is the process of increasing the size of an item without affecting its form. Depending on the scale factor, the object's size can be raised or lowered. There is no effect of dilation on the angle.
Micah drew a map of his neighborhood. The actual distance from his house to the school is 5.75 miles. Then the scale factor is given as,
Scale factor = 5.75 / 2
Scale factor = 2.875 miles per inch
Then the actual distance from the library to the park is given as,
D = 1 x 2.875
D = 2.875 miles
The scale factor is 2.875 miles per inch. Then the actual distance from the library to the park will be 2.875 miles.
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The missing diagram is given below.
Answer:
2.875 miles per inch
Step-by-step explanation:
Three students want to estimate the mean word length of the same book. To do this, each student randomly chose 4 words from the book and recorded their lengths. The samples are shown in the table. (a)Fill in the sample means in the table. Do not round your answers. (number of letters) Sample mean 3, 3, 4, 7 - 8, 2, 3, 6 - 8, 5, 2, 4 (b)Use the table to calculate the range of the sample means. Range of sample means: (c)The students are going to use the sample means to estimate the mean word length in the book. Select all the true statements below. The mean of the sample means will tend to be a worse estimate than a single sample mean. A single sample mean will tend to be a worse estimate than the mean of the sample means. The closer the range of the sample means is to 0, the more confident they can be in their estimate. The farther the range of the sample means is from 0, the more confident they can be in their estimate.
The solutions to the questions are given below
a)
sample(n) word length sample mean
1 5,4,4,2 3.75
2 3,2,3,6 3.5
3 5,6,3,3 4.25
b)R =0.75
c)
The mean of the sample means will tend to be a better estimate than a single sample mean.The closer the range of the sample means is to 0, the more confident they can be in their estimate.What is the students are going to use the sample means to estimate the mean word length in the book.?The table below shows sample means in the table.
sample(n) word length sample mean
1 5,4,4,2 3.75
2 3,2,3,6 3.5
3 5,6,3,3 4.25
b)
Generally, the equation for is mathematically given as
variation in the sample means
R =maximum -minimum
R=4.25-3.5
R =0.75
c)
In conclusion, In most cases, the mean of many samples will provide a more accurate estimate than the mean of a single sample.
They may have a higher level of confidence in their estimate if the range of the sample means is closer to 0 than it is now.
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A point P lies on the line with equation y= 4-3X. The point P is a distance √34 from the origin. Find the two possible positions Of point P
The two possible positions of point P are:
(3, -5) and (0.6, 5.8)
How to find the two possible positions of point P?
We know that point P lies on the line:
y = 4 - 3*x
And that the distance between P and the origin is √34, then if the coordinates of point P are (x, y), we have that:
[tex]\sqrt{34} = \sqrt{x^2 + y^2}[/tex]
Now, we can replace "y" in the distance equation by the linear equation, and also remove the square roots:
[tex]34 = x^2 + (4 - 3x)^2[/tex]
Now we can solve the quadratic equation for x:
[tex]34 = x^2 + 9x^2 + 16 - 24x\\\\10x^2 - 24x - 18 = 0\\\\[/tex]
The solutions are:
[tex]x = \frac{24 \pm \sqrt{(-24)^2 - 4*10*(-18)} }{2*10} \\\\x = \frac{24 \pm36}{20}[/tex]
So the two solutions are:
x = (24 + 36)/20 = 3
x = (24 - 36)/20 = -0.6
To get the points, we need to evaluate y on these values:
y = 4 - 3*3 = -5 So we have P = (3, -5)
y = 4 - 3*(-0.6) = 2.2 So we have the point (0.6, 5.8)
There are the two possible positions of point P.
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Which of the following functions is graphed below?
The definition of the given piecewise function is:
[tex]y = x^3 - 3, x \leq 2[/tex][tex]y = x^2 + 6, x > 2[/tex]What is a piecewise function?A piecewise function is a function that has different definitions, depending on the input.
In this problem, for x until 2, the function is the cube function shifted down 3 units, hence the definition is:
[tex]y = x^3 - 3, x \leq 2[/tex]
For x greater than 2, the function is the square function shifted up 6 units, hence the definition is:
[tex]y = x^2 + 6, x > 2[/tex]
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I really need help with this!! I’ll give brainliest to who ever answers!!
Answer:
a. triangle DEF's lines are all 3 times more than triangle ABC
b. triangle DEF's lines are all 3 times more than triangle ABC
c. 2.5 times 2 = 5
I hope u can elaborate a bit more :)
the x and y intercept
Answer:
Step-by-step explanation:
X-INTERCEPT
Plug y=0 into the equation and solve the resulting equation −6x=−7 for x.
The x-intercept:
[tex]\left(\frac{7}{6},0\right)\approx \left(1.16666666666667,0\right)[/tex]
Y-INTERCEPT
Plug x=0 into the equation and solve the resulting equation 3y=−7 for y.
The y-intercept:
[tex]\left(0, - \frac{7}{3}\right)\approx \left(0,-2.33333333333333\right)[/tex]
Answer:
[tex]x[/tex]-intercept = ([tex]-\frac{7}{6}[/tex] , 0)
[tex]y[/tex]-intercept = (0 , [tex]-\frac{7}{3}[/tex])
Step-by-step explanation:
[tex]6x + 3y = -7[/tex]
• The x-intercept is the point at which the line crosses the x-axis, that is, where y = 0.
∴ [tex]6x + 3(0) = -7[/tex]
⇒ [tex]6x = -7[/tex]
⇒ [tex]x = \bf -\frac{7}{6}[/tex]
∴ The x-intercept is at the point ([tex]-\frac{7}{6}[/tex] , 0).
• Similarly, the y-intercept is the point at which the line crosses the y-axis, that is, where x = 0.
∴ [tex]6(0) + 3y = -7[/tex]
⇒ [tex]3y = -7[/tex]
⇒ [tex]y = \bf - \frac{7}{3}[/tex]
∴ The y-intercept is at the point (0 , [tex]-\frac{7}{3}[/tex]).
Using a calculator, circle the best price for a single doughnut using the prices given at five different bakeries.
a. $.42 each
b. 3 for $1.38
c. 9 for $3.60
d. 1 dozen for $6.00
e. 1/2 dozen for $2.70
Answer: C
Step-by-step explanation: We see that e is 6 for $2.70 and d is 12 for $6.00. Half of 6 is 3 and 2.70 is less than 3 so the cheapest price can't be d. Then, we have 9 for 3.60. 3.60 divided by 9 is 0.40 per which is cheaper than a (0.42 per) so a and d can't be the cheapest. 3 for 1.38 means 0.46 per which is more expensive than a so it also cannot be b. Now we only have c and e left. We divide 2.70 by 6 and find out that the answer is 0.45 which is also more expensive than a. So, the answer is c.
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Your Turn:
Simplify the following expressions by combining like term
1) 4x + 7 + 2x
2) -4x+3y-3x+8+2y
Answer:
[tex]\Large\boxed{1)~6x+7}[/tex]
[tex]\Large\boxed{2)~-7x+5y+8}[/tex]
Step-by-step explanation:
Question 1: 4x + 7 + 2xGiven expression
4x + 7 + 2x
Move like terms together
= 4x + 2x + 7
= (4x + 2x) + 7
Combine like terms
[tex]\Large\boxed{=6x+7}[/tex]
Question 2: -4x+3y-3x+8+2yGiven expression
-4x + 3y - 3x + 8 + 2y
Move like terms together
= -4x - 3x + 3y + 2y + 8
= (-4x - 3x) + (3y + 2y) + 8
Combine like terms
[tex]\Large\boxed{=-7x+5y+8}[/tex]
Hope this helps!! :)
Please let me know if you have any questions
Quick algebra 1 question for 10 points!
Only answer if you know the answer, quick shout-out to tariqareesha2 and MrBrainly, tysm for the help!
[tex]denote \: by \: s \: the \: cost \: of \: a \: sweatshirt \\ denote \: by \: t \: the \: cost \: of \: a \: t \: shirt[/tex]
[tex]3t + 7s = 240.5 \\ 6t + 5s = 220[/tex]
[tex] - 6t - 14s = - 481 \\ 6t + 5s = 220[/tex]
[tex] - 9s = - 261 \\ s = \frac{ - 261}{ - 9} = 29 \: dollars[/tex]
[tex]3t + 7(29) = 240.5 \\ [/tex]
3t + 203 = 240.5
3t = 37.5
t = 12.5 dollars
PLEASE HELP!!
Find the value of the following expression:
(2^8 ⋅ 5^−5 ⋅ 19^0)^−2 ⋅ (5^-2/2^3)^4 ⋅ 2^28
Write your answer in simplified form. Show all your steps.
Answer:
25
Step-by-step explanation:
Cancel out 19^0, then exponentiate and simplify by multiplying exponents. Then simplify the terms. This leaves you with 2^-16*5^10*5^-8*2^16 which equals 5^2 which is 25
Use the laplace transform to solve the given system of differential equations. dx dt + 3x + dy dt = 1 dx dt − x + dy dt − y = et x(0) = 0, y(0) = 0
Let [tex]X(s)[/tex] and [tex]Y(s)[/tex] denote the Laplace transforms of [tex]x(t)[/tex] and [tex]y(t)[/tex].
Taking the Laplace transform of both sides of both equations, we have
[tex]\dfrac{dx}{dt} + 3x + \dfrac{dy}{dt} = 1 \implies \left(sX(s) - x(0)\right) + 3X(s) + \left(sY(s) - y(0)\right) = \dfrac1s \\\\ \implies (s+3) X(s) + s Y(s) = \dfrac1s[/tex]
[tex]\dfrac{dx}{dt} - x + \dfrac{dy}{dt} = e^t \implies \left(sX(s) - x(0)\right) - X(s) + \left(sY(s) - y(0)\right) = \dfrac1{s-1} \\\\ \implies (s-1) X(s) + s Y(s) = \dfrac1{s-1}[/tex]
Eliminating [tex]Y(s)[/tex], we get
[tex]\left((s+3) X(s) + s Y(s)\right) - \left((s-1) X(s) + s Y(s)\right) = \dfrac1s - \dfrac1{s-1} \\\\ \implies X(s) = \dfrac14 \left(\dfrac1s - \dfrac1{s-1}\right)[/tex]
Take the inverse transform of both sides to solve for [tex]x(t)[/tex].
[tex]\boxed{x(t) = \dfrac14 (1 - e^t)}[/tex]
Solve for [tex]Y(s)[/tex].
[tex](s - 1) X(s) + s Y(s) = \dfrac1{s-1} \implies -\dfrac1{4s} + s Y(s) = \dfrac1{s-1} \\\\ \implies s Y(s) = \dfrac1{s-1} + \dfrac1{4s} \\\\ \implies Y(s) = \dfrac1{s(s-1)} + \dfrac1{4s^2} \\\\ \implies Y(s) = \dfrac1{s-1} - \dfrac1s + \dfrac1{4s^2}[/tex]
Taking the inverse transform of both sides, we get
[tex]\boxed{y(t) = e^t - 1 + \dfrac14 t}[/tex]
In a mixed school, the number of girls is 375. if the boys to girls is 4:5.how many boys are in the school
Answer:
300
Step-by-step explanation:
375 divided by 5=75
Each “1”=75
4x75=300
There are 300 boys.
Hope this makes sense
Answer:
300 boys
Step-by-step explanation:
Let the number of boys = x
Girls: 375
boys : girls = 4 : 5
total in the ratio is 9
girls are 5/9 of total, and are 375
boys are 4/9 of total
5/9 x = 375
x = 375 × 9/5
x = 675
Boys are 4/9 of total.
4/9 × 675 = 300
Does anyone know the answer to this question? I’ve been staring at this for a solid 20mins but can’t figure it out.
[tex]\huge\underline{\underline{\boxed{\mathbb {SOLUTION:}}}}[/tex]
A linear function is an equation of the form:
[tex]\sf{y=mx+b}[/tex]
▪ [tex]\sf{m= \: slope}[/tex]
▪ [tex] \sf{b= \: y-intercept}[/tex]
First, pick any two pairs of points from the table.
[tex]\small\longrightarrow \sf{(x_1,y_1)(-1.13)}[/tex]
[tex]\small\longrightarrow \sf{(x_2,y_2)=(0,10)}[/tex]
Using these points, find the slope.
[tex]\small\longrightarrow \sf{m= \dfrac{y _{2 } - y_1}{x_2-y_1} }[/tex]
When x=0, y=10, therefore, the y-intercept, b=10.
[tex]\leadsto[/tex] Substitute m=-3 and b=10 into the slope-intercept form given above:
[tex]\small\longrightarrow \sf{m=m = \dfrac{10 - 13 }{0 -( - 1) } = - \dfrac{3}{1} = - 3}[/tex]
▪ [tex]\small\longrightarrow \sf{y= -3x+10}[/tex]
[tex]\huge\underline{\underline{\boxed{\mathbb {ANSWER:}}}}[/tex]
[tex]\large\boxed{\bm{y= -3x+10}}[/tex]
Evaluate the following integral (Calculus 2) Please show step by step explanation!
Answer:
[tex]\displaystyle \int \dfrac{x^2-4}{x^3-2x^2+x}\:\:\text{d}x=-4 \ln |x|+5 \ln|x-1|+\dfrac{3}{x-1}+\text{C}[/tex]
Step-by-step explanation:
Fundamental Theorem of Calculus
[tex]\displaystyle \int \text{f}(x)\:\text{d}x=\text{F}(x)+\text{C} \iff \text{f}(x)=\dfrac{\text{d}}{\text{d}x}(\text{F}(x))[/tex]
If differentiating takes you from one function to another, then integrating the second function will take you back to the first with a constant of integration.
Given integral:
[tex]\displaystyle \int \dfrac{x^2-4}{x^3-2x^2+x}\:\:\text{d}x[/tex]
Factor the denominator:
[tex]\begin{aligned}\implies x^3-2x^2+x & = x(x^2-2x+1)\\& = x(x^2-x-x+1)\\& = x(x(x-1)-1(x-1))\\ & = x((x-1)(x-1))\\& = x(x-1)^2\end{aligned}[/tex]
[tex]\implies \displaystyle \int \dfrac{x^2-4}{x^3-2x^2+x}\:\:\text{d}x=\displaystyle \int \dfrac{x^2-4}{x(x-1)^2}\:\:\text{d}x[/tex]
Take partial fractions of the given fraction by writing out the fraction as an identity:
[tex]\begin{aligned}\dfrac{x^2-4}{x(x-1)^2} & \equiv \dfrac{A}{x}+\dfrac{B}{(x-1)}+\dfrac{C}{(x-1)^2}\\\\ \implies \dfrac{x^2-4}{x(x-1)^2} & \equiv \dfrac{A(x-1)^2}{x(x-1)^2}+\dfrac{Bx(x-1)}{x(x-1)^2}+\dfrac{Cx}{x(x-1)^2}\\\\ \implies x^2-4 & \equiv A(x-1)^2+Bx(x-1)+Cx \end{aligned}[/tex]
Calculate the values of A and C using substitution:
[tex]\textsf{when }x=0 \implies -4=A(1)+B(0)+C(0) \implies A=-4[/tex]
[tex]\textsf{when }x=1 \implies -3=A(0)+B(0)+C(1) \implies C=-3[/tex]
Therefore:
[tex]\begin{aligned}\implies x^2-4 & \equiv -4(x-1)^2+Bx(x-1)-3x\\& \equiv -4(x^2-2x+1)+B(x^2-x)-3x\\& \equiv -4x^2+8x-4+Bx^2-Bx-3x\\& \equiv (B-4)x^2+(5-B)x-4\\\end{aligned}[/tex]
Compare constants to find B:
[tex]\implies 1=B-4 \implies B=5[/tex]
Substitute the found values of A, B and C:
[tex]\implies \displaystyle \int \dfrac{x^2-4}{x^3-2x^2+x}\:\:\text{d}x=\displaystyle \int -\dfrac{4}{x}+\dfrac{5}{(x-1)}-\dfrac{3}{(x-1)^2}\:\:\text{d}x[/tex]
[tex]\textsf{Apply exponent rule} \quad \dfrac{1}{a^n}=a^{-n}[/tex]
[tex]\implies \displaystyle \int \dfrac{x^2-4}{x^3-2x^2+x}\:\:\text{d}x=\displaystyle \int -\dfrac{4}{x}+\dfrac{5}{(x-1)}-3(x-1)^{-2}}\:\:\text{d}x[/tex]
[tex]\boxed{\begin{minipage}{5 cm}\underline{Terms multiplied by constants}\\\\$\displaystyle \int ax^n\:\text{d}x=a \int x^n \:\text{d}x$\end{minipage}}[/tex]
[tex]\boxed{\begin{minipage}{4 cm}\underline{Integrating} $\dfrac{1}{x}$\\\\$\displaystyle \int \dfrac{1}{x}\:\text{d}x=\ln |x|+\text{C}$\end{minipage}}[/tex]
[tex]\boxed{\begin{minipage}{4 cm}\underline{Integrating $ax^n$}\\\\$\displaystyle \int ax^n\:\text{d}x=\dfrac{ax^{n+1}}{n+1}+\text{C}$\end{minipage}}[/tex]
[tex]\begin{aligned}\implies \displaystyle \int \dfrac{x^2-4}{x^3-2x^2+x}\:\:\text{d}x & =\displaystyle \int -\dfrac{4}{x}+\dfrac{5}{(x-1)}-3(x-1)^{-2}}\:\:\text{d}x\\\\& = \displaystyle -4\int \dfrac{1}{x}\:\:\text{d}x+5\int \dfrac{1}{(x-1)}\:\:\text{d}x-3 \int (x-1)^{-2}}\:\:\text{d}x\\\\& = \displaystyle -4 \ln |x|+5 \ln|x-1|-3 \int (x-1)^{-2}}\:\:\text{d}x\end{aligned}[/tex]
Use Integration by Substitution:
[tex]\textsf{Let }u=(x-1) \implies \dfrac{\text{d}u}{\text{d}x}=1 \implies \text{d}x=\text{d}u}[/tex]
Therefore:
[tex]\implies \displaystyle -4 \ln |x|+5 \ln|x-1|-3 \int (x-1)^{-2}}\:\:\text{d}x[/tex]
[tex]\implies \displaystyle -4 \ln |x|+5 \ln|x-1|-3 \int u^{-2}}\:\:\text{d}u[/tex]
[tex]\implies -4 \ln |x|+5 \ln|x-1|-\dfrac{3}{-1}u^{-2+1}+\text{C}[/tex]
[tex]\implies -4 \ln |x|+5 \ln|x-1|+3u^{-1}+\text{C}[/tex]
[tex]\implies -4 \ln |x|+5 \ln|x-1|+\dfrac{3}{u}+\text{C}[/tex]
Substitute back in u = (x - 1):
[tex]\implies -4 \ln |x|+5 \ln|x-1|+\dfrac{3}{x-1}+\text{C}[/tex]
Learn more about integration here:
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what is 155x60cm into square inches
Answer:
1441.503 square inches
Step-by-step explanation:
155×60cm=9300square centimeter
9300 divide 6.452 to change to square inches.
Ans=1441.503
Answer:
64.58 sq.in
Step-by-step explanation:
Complementary angles have measures (4x)° and (5x−27)°. find the measure of the larger angle.
Answer:
4x=90
X=90÷4
X=22.5
5x-27=90
5x=90+27
5x=117
X=117÷5
X=23.4
So 23.4 is a larger angle