Answers
Answer:
D
Step-by-step explanation:
This result is true by De Moivre's theorem.
Related Questions
21. For the following exercises, use the descriptions of each pair of lines given below to find the slopes of Line 1 and Line 2. Is each pair of lines parallel, perpendicular, or neither?
21. Line 1: Passes through (1, 7) and (5, 5)
Line 2: Passes through (−1, −3) and (1, 1)
Answers
Answer:
The given lines are perpendicular.
Step-by-step explanation:
In the question, two lines are given as line 1 passes through (1,7) and (5,5). Whereas, line 2 passes through (-1,-3) and (1,1).
It is required to find the slope of given lines and figure out whether they are perpendicular, parallel or neither.
To solve this question, first find the slope of both lines. Check if their product is equal to -1, then they are perpendicular. If the slopes are equal the lines are parallel.
Step 1 of 2
Find the slope of first line.
[tex]$$\begin{aligned}m_{1} &=\frac{5-7}{5-1} \\m_{1} &=\frac{-2}{4} \\m_{1} &=-\frac{1}{2}\end{aligned}$$[/tex]
Step 2 of 2
Find the slope of first line.
[tex]$$\begin{aligned}&m_{2}=\frac{1-(-3)}{1-(-1)} \\&m_{2}=\frac{4}{2} \\&m_{2}=2\end{aligned}$$[/tex]
And
[tex]$$\begin{aligned}&m_{1} m_{2}=-\frac{1}{2}(2) \\&m_{1} m_{2}=-1\end{aligned}$$[/tex]
Since, both slopes are reciprocal of each other.
Therefore, the lines are perpendicular.
Find the total surface area of this cylinder.
Give your answer to 1 decimal place.
20 cm
11 cm
Answers
jackie has been averaging 3 hits for every 10 times at bat. What is the probability that she will get eactly 2 hits in her net 5 times at bat?
Answers
Answer:
the chance is 1.5 out of 5
Thaddeus models the number of hours of daylight in his town as
d(t) = 2sin(xt) + 12, where dis the number of daylight hours and tis the
time in months since january 1.
what are the least and greatest numbers of daylight hours over the course of
a year?
a. least: 10 hours; greatest: 14 hours
b. least: 6 hours; greatest: 12 hours
c. least: 2 hours; greatest: 12 hours
o d. least: 7 hours; greatest: 14 hours
submit
Answers
Option (A) : least: 10 hours; greatest: 14 hours
The function f(x) = sin x has all real numbers in its domain, but its range is
−1 ≤ sin x ≤ 1.
How to solve such range questions?
Such questions in which every term is in addition and its range is asked is simplest ones to solve if we know the range of each of term. This can be seen from this question
Given: d(t) = 2sin(xt) + 12
= −1 ≤ sin (xt) ≤ 1.
= −2≤ 2 sin (xt) ≤ 2.
= 10 ≤ 2sin (xt) + 12 ≤ 14
= 10 ≤d(t) ≤ 14
Thus least: 10 hours; greatest: 14 hours
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lorena lifeguards at a lap pool that is 25 yards long, 10 ards wide, and 2 yards deep. There is a drain around he entire top edge of the pool. Each winter, Lorena uts a cover over the top surface of the pool. 25 yd Cover 2 yd 10 yd Which statements are true about the poor? Check all that apply The drain is best measured using perimeter The volume of water in the pool is measured in square yards The area of the cover is 250 yo The length of the drain is the perimeter of the top of the pool and is 100 yd One edge of the pool measures 10 yd orena lifeguards at a lap pool that is 25 yards long , 10 ards wide , and 2 yards deep . There is a drain around he entire top edge of the pool . Each winter , Lorena uts a cover over the top surface of the pool . 25 yd Cover 2 yd 10 yd Which statements are true about the poor ? Check all that apply The drain is best measured using perimeter The volume of water in the pool is measured in square yards The area of the cover is 250 yo The length of the drain is the perimeter of the top of the pool and is 100 yd One edge of the pool measures 10 yd
Answers
The true statements about the pool are
The drain is best measured using perimeter The area of the cover is 250 square yardsOne edge of the pool measures 10 ydHow to determine true statements?The given parameters are:
Length = 25 yardsWidth = 10 yardsDepth = 2 yardsTo measure the drain, we simply calculate the perimeter of the edge of the pool.
This means that (a) is correct
When the volume is calculated, the unit is cubic yard or yd³.
This means that (b) is wrong
The area of the cover is:
Area = Length * Width
This gives
Area = 25 yards * 10 yards
Evaluate
Area = 250 square yards
This means that (c) is correct
The length of the drain is calculated as:
Perimeter = 2 *(Length + Width)
This gives
Perimeter = 2 * (25 + 10)
Evaluate
Perimeter = 70
This means that (d) is wrong
Lastly (e) is correct, because the width of pool is 10 yards
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SOMEONE PLS HELP MEEEE
Answers
The solutions to the quadratic equations are:
a) [tex]x = \frac{3 \pm \sqrt{19}}{5}[/tex]
b) x = -8, x = 5.
A quadratic function is given according to the following rule:
[tex]y = ax^2 + bx + c[/tex]
The solutions are:
[tex]x_1 = \frac{-b + \sqrt{\Delta}}{2a}[/tex]
[tex]x_2 = \frac{-b - \sqrt{\Delta}}{2a}[/tex]
In which:
[tex]\Delta = b^2 - 4ac[/tex]
Item a:
The coefficients are a = 5, b = -6, c = -2, hence:
[tex]\Delta = (-6)^2 - 4(5)(-2) = 76[/tex][tex]x_1 = \frac{6 + \sqrt{76}}{10} = \frac{6 + 2\sqrt{19}}{10} = \frac{3 + \sqrt{19}}{5}[/tex][tex]x_2 = \frac{6 - \sqrt{76}}{10} = \frac{6 - 2\sqrt{19}}{10} = \frac{3 - \sqrt{19}}{5}[/tex]Item b:
The equation is:
x² + 3x = 40
x² + 3x - 40 = 0.
It can be simplified as follows:
(x - 5)(x + 8) = 0.
Hence the solutions are:
x - 5 = 0 -> x = 5.x + 8 = 0 -> x = -8.More can be learned about quadratic equations at https://brainly.com/question/24737967
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Anyone know what to do to figure this out ? :1/2(27+6)10
Answers
[tex]\bf{\dfrac{1}{2}(27+6)10 }[/tex]
Add 27 and 6 to get 33.
[tex]\bf{\dfrac{1}{2}(33)(10) }[/tex]
Multiply 1/2 by 3 to get 33/2.
[tex]\bf{\dfrac{33}{2}(10) }[/tex]
Express 33/2 (10) as a single fraction.
[tex]\bf{\dfrac{(33)(10)}{2} }[/tex]
Multiply 33 and 10 to get 330.
[tex]\bf{\dfrac{330}{2} }[/tex]
Divide 330 by 2 to get 165.
[tex]\bf{165 \ \ \to \ \ \ Answer}[/tex]
{ Pisces04 }I need the answer for number 8
Answers
Answer:
Step-by-step explanation:
I'm going to assume you want it to be a perfect triangle, so then we would have the equation 4x=24. So we can divide each side by 4 to get rid of the 4 and get x by itself. So 24/4= 5. So x=5
For each experiment, determine whether events A and B are independent or dependent.
Answers
For the given experiments there are following outcomes.
A) Independent
b) Dependent
C) Dependent
D) Dependent
E) Independent
Probability can be defined as the ration of favorable outcomes to the total number of events.
For A)
A coin is tossed and a dice is flip. Both the event are independent of each other.
For B)
Choosing of clips have same total number of events that why both the events are dependent to each other.
For C)
It also have same number of total samples cause both cherries and nuts contained chocolate belongs to the same box. That's why its also dependent.
For D)
It is also dependent because the total number of sample is same for both the marbles.
For E)
It is independent, because for every box that picked reduces the size of sample and probability of picking new box wont depends on previous box.
Thus, this is how events are dependent and independent
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12. a) Solve the following|x-1|<2.
Answers
Work Shown:
| x-1 | < 2
-2 < x-1 < 2 ... see note1 below
-2+1 < x-1+1 < 2+1 ... see note2
-1 < x < 3
Note1: use the rule that |x| < k turns into -k < x < k for some positive real number k.Note2: Add 1 to all sides to isolate xAurora is planning to participate in an event at her school's field day that requires her to complete tasks at various stations in the fastest time possible. To prepare for the event, she is practicing and keeping track of her time to complete each station.
The x-coordinate is the station number, and the y-coordinate is the time in minutes since the start of the race that she completed the task.
(1, 3), (2, 6), (3, 12), (4, 24)
Part A: Is this data modeling an arithmetic sequence or a geometric sequence? Explain your answer. (2 points)
Part B: Use a recursive formula to determine the time she will complete station 5. Show your work. (4 points)
Part C: Use an explicit formula to find the time she will complete the 9th station. Show your work. (4 points)
Answers
The data is modeling a geometric sequence because they have a common ratio of 2.
Calculations and ParametersThe recursive formula to determine the time she will complete station 5
f(n)=f(n-1)*rf(n)=f(5-1)*2f(n)=f(4)*2f(n)=(24)2f(n)= 48Part C:
The explicit formula to find the time she will complete the 9th station.
f(n)=f(1)*r^n-1f(n)=3*2^8-1f(n)=3*2^7f(n)=3*128f(n)=384Read more about recursive formula here:
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A trader sold a tv for sh .18000 making a 20percent loss.For how much was he supposed to sell it in order to make 20percent profit.
Answers
Answer:
The trader was supposed to cell the TV for sh. 27000 in order to make 20% profit
==============
Let the cost price is x.
We have:
x - 20% = 18000Solve it for x:
x - 0.2x = 180000.8x = 18000x = 18000/0.8x = 22500The cost is 22500, find selling price with 20% profit:
22500 + 20% = 22500 + 0.2*22500 = 22500*1.2 = 27000find intervals when the graph is growing or increasing or constant
Answers
The function shown in the graph is increasing over the interval (-1, 0) and (1, ∞). It is decreasing over the interval (-∞, -1) and (0, 1). The function does not remain constant.
What is an equation?An equation is an expression that shows the relationship between two or more variables and numbers.
The function shown in the graph is increasing over the interval (-1, 0) and (1, ∞). It is decreasing over the interval (-∞, -1) and (0, 1). The function does not remain constant.
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12. Which one is not a polynomial? a) 4x² + 2x - 1 b) y - 3/y b) y² + √5y + 1
pls help ASAP
Answers
Answer:
b is not a polynomial
Step-by-step explanation:
b is not a polynomial because in y-3/y the y in denomination means y to the power -1 when it is taken to numerator and if power is negative then it is not a polynomial
Given the function defined in the table below, find the average rate of change, in
simplest form, of the function over the interval 3 ≤ x ≤ 6.
Answer:
OC
1
2
ين
3
4
5
6
f(x)
69
64
59
54
49
44
Need Help
Answers
Answer:
this question is not clear i have read it twice an still dont understand it. Sorry
A rectangle is divided into two equal parts and a circle is divided into four parts and a circle is divided into four equal parts. One part of rectangle is shaded.
How many parts of the circle should be shaded so that both the figures have the same fraction shaded?(1 Point)
Answers
Answer:
2 parts
Step-by-step explanation:
The rectangle has a 1/2 ratio, because there are 4 parts of the circle, you will shade 2. This is because 2/4 ratio is simplified to 1/2.
Please help ASAP!
Robin can clean 72 rooms in 6 days.
How many rooms can Robin clean in 9 days?
I'll give 20 points away.
Answers
9 times 12 is 108 so the answer is she can clean 108 rooms in 9 days
30. For the following exercises, given each set of information, find a linear equation satisfying the conditions, if possible.
30. f(-5) = -4, and f(5) = 2
Answers
Answer:
The required linear equation satisfying the given conditions f(-5)=-4 and f(5)=2 is
[tex]$$y=\frac{3}{5} x-1$$[/tex]
Step-by-step explanation:
It is given that f(-5)=-4 and f(5)=2. It is required to find out a linear equation satisfying the conditions f(-5)=-4 and f(5)=2. To find it out, first, represent the given conditions in the form of points and then find the slope of a line passing through these two given points. Then consider one of the points to give the linear equation of the line in the form [tex]$\left(y-y_{2}\right)=m\left(x-x_{2}\right)$[/tex]
Step 1 of 4
Observe, f(-5)=-4 gives the point (5,-4)
And f(5)=2 gives the point (5,2)
This means that the function f(x) satisfies the points (-5,-4) and (5,2).
Step 2 of 4
Now find out the slope of a line passing through the points (-5,-4) and (5,2).
[tex]$$\begin{aligned}m &=\frac{y_{2}-y_{1}}{x_{2}-x_{1}} \\m &=\frac{2-(-4)}{5-(-5)} \\m &=\frac{2+4}{5+5} \\m &=\frac{6}{10} \\m &=\frac{3}{5}\end{aligned}$$[/tex]
Step 3 of 4
Now use the slope [tex]$m=\frac{3}{5}$[/tex] and use one of the two given points and write the equation in point-slope form:
[tex]$$\left(y-y_{2}\right)=m\left(x-x_{2}\right)$$\\ $$(y-2)=\frac{3}{5}(x-5)$$[/tex]
Distribute [tex]$\frac{3}{5}$[/tex],
[tex]$$\begin{aligned}&y-2=\frac{3}{5} x-\frac{3}{5} \times 5 \\&y-2=\frac{3}{5} x-3\end{aligned}$$[/tex]
Step 4 of 4
This linear function can be written in the slope-intercept form by adding 2 on both sides, [tex]$y-2+2=\frac{3}{5} x-3+2$[/tex]
[tex]$$y=\frac{3}{5} x-1$$[/tex]
So, this is the required linear equation.
During a local high school football game, the height h feet of a football after t seconds can be represented by the function h(t) = −16t2+ 58t + 2. Find h(2.5) and explain its meaning.
Answers
h(2.5) = 47, and this mean that the height of the football after 2.5 seconds is 47 feet, using the quadratic function h(t) = -16t² + 58t + 2.
In the question, we are given that during a local high school football game, the height of h feet of a football after t seconds can be represented by the quadratic function h(t) = -16t² + 58t + 2.
We are asked to find h(2.5) and explain its meaning.
To find h(2.5), we substitute t = 2.5, in the quadratic function h(t) = -16t² + 58t + 2.
Thus,
h(2.5) = - 16(2.5)² + 58(2.5) + 2,
or, h(2.5) = - 16(6.25) + 145 + 2,
or, h(2.5) = -100 + 147,
or, h(2.5) = 47.
Hence, h(2.5) = 47, and this mean that the height of the football after 2.5 seconds is 47 feet, using the quadratic function h(t) = -16t² + 58t + 2.
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A rotation is a transformation where an object . A translation is a transformation where an object
Answers
A translation is a transformation in which an object at every point according to a given vector and a rotation is a transformation in which an object is moved angularly with respect to a point.
What is the nature of two rigid transformations?
In this question we have two rigid transformations to be defined: (i) Rotation, (ii) Translation. Rigid transformations are transformations applied on geometric loci such that Euclidean distance is conserved. Herein we must describe the characteristic of a rotation and a translation.
A translation is a transformation in which an object at every point according to a given vector and a rotation is a transformation in which an object is moved angularly with respect to a point.
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Answer:
A rotation is a transformation where an object-
moves in a circular arc around a point
A translation is a transformation where an object-
moves a specified distance along a line parallel to a specified line
Step-by-step explanation:
Plato answer
On a coordinate plane, 2 quadrilaterals are shown. Quadrilateral Q R S T has points (negative 1, 0), (5, 0), (3.5, negative 6) and (negative 2.5, negative 6). Quadrilateral Q prime R prime S prime T prime has points (negative 1, 2), (1, 2), (0.5, 0), and (negative 1.5, 0).
Quadrilateral QRST is dilated and translated to form similar figure Q'R'S'T'. What is the scale factor for the dilation?
Answers
Based on the calculations, the scale factor for this dilation is equal to 1/3.
How to determine the scale factor for this dilation?First of all, we would use the distance formula to find the length of side QR and Q'R' as follows:
Distance = √[(x₂ - x₁)² - (y₂ - y₁)²]
Substituting the given points into the formula, we have;
Distance QR = √[(5 - (-1))² + (0 - 0)²]
Distance QR = √[(5 + 1)² + (0)²]
Distance QR = √[6² + 0]
Distance QR = √36
Distance QR = 6 units.
For side Q'R', we have:
Distance Q'R' = √[(1 - (-1))² + (2 - 2)²]
Distance Q'R' = √[(1 + 1)² + (0)²]
Distance Q'R' = √[2² + 0]
Distance Q'R' = √4
Distance Q'R' = 2 units.
Now, the scale factor for this dilation is given by:
Scale factor = Q'R'/QR
Scale factor = 2/6
Scale factor = 1/3.
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Answer:
Step-by-step explanation:
its 1/3
Stan walked a distance of 15km in 3 hours. At what average speed did stan walk?
Answers
Hello,
[tex]Speed = \frac{Distance}{Time} = \frac{15 km}{3 h} = \boxed{5 km/h}[/tex]
Stan walked at 5 km/h
solve the following equation for q. 5q - 3p + 4 = 4q - 2
Answers
Geometry question confused
Answers
Answer:
my ans will be wrong also and right also 50%5$chances it is an opposite angle so it is in out manner so iys sum is 180 so we have to subbtract
Step-by-step explanation:
65०to 180०(180०-65०=115०) i think ans is 115०the missing angle measurement is 115०in my opinion
How may sides would a regular polygon have if each exterior angle measures 6 degrees
Answers
Answer:
60 sidesStep-by-step explanation:
Since the sum of all exterior angles in a polygon is 360°, we have to divide 360 by 6 to find the number of sides.
360/6 = 60.
So, the polygon has 60 sides.
Hope this helps! (:
Answer:
14
Step-by-step explanation:
because it is a small angle that will indooor more sides
Multiply Conjugates Using the Product of Conjugates Pattern
In the following exercises, multiply each pair of conjugates using the Product of Conjugates Pattern
323. (c − 5)(c + 5)
Answers
Answer:
The product is the difference of squares is [tex]$$\left(c-5\right)\left(c+5\right)={{c}^2}-25$$[/tex]
Step-by-step explanation:
Explanation
The given expression is (c-5)(c+5).We have to multiply the given expression.Square the first term c. Square the last term 5 .[tex]$$\begin{aligned}&(c-5)(c+5)=(c)^{2}-(5)^{2} \\&(c-5)(c+5)=c^{2}-25\end{aligned}$$[/tex]
CAN ANYONE HELP ME WITH THIS QUESTION?
Answers
Answer:
try 4
Step-by-step explanation:
8x4= 32
32-7=25
Which of the following rational functions is graphed below?
Answers
Question 1 of 15
Solve 18x+62 12x+18.
A. x ≥ 4
B. x≤ 4
C. x≤2
D. x ≥ 2
Answers
Answer:
18+62=80x
12+18=30x
x=80÷30=2
x>2
Each of 15 learners will give a one and a half minute speech in their mother tongue. how long will it take to give the speeches?
Answers
It will take approx. 22 minutes and 30 seconds for the speeches.
What is Division?It is the inverse of the multiplication operation. It is defined as the act of forming equal groups. While dividing numbers, we break down a larger number into smaller numbers such that the multiplication of those smaller numbers will be equal to the larger number taken.
Here, Time duration of each learner = 1 minutes 30 seconds
= 3/2 minutes.
Total number of learners = 15
Time taken by all the speech category = 15 X 3/2
= 45/2
= 22 minutes 30 seconds
Thus, It will take approx. 22 minutes and 30 seconds for the speeches.
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