1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irinina [24]
3 years ago
14

Multiple choice: 

Mathematics
1 answer:
Paha777 [63]3 years ago
7 0
In the given you wrote -2, whereas it should be -2i

z = a + bi and in trigo form | z |.(cos Ф + i.sin Ф).
z = 0 -2i → | z |.(cos Ф + i.sin Ф)
Now let's calculate z:
 
z² = a²+b² → z² = 0² (-2.i)² → z = -2(i)² →z= -2(-1) → z = |2|
tan Ф = b/a = -2/0 → tan Ф → - ∞ ↔ Ф = -90° or Ф = 270°
 then the - 2 I ↔ |2|(cos 270° + i.sin 270°)

You might be interested in
Find the scale factor of the line segment dilation.
serg [7]
The lengths of the segments can be calculated using:
d = √[(y₂-y₁)² + (x₂-x₁)]²
First, we calculate the length of AB using this formula:
L(AB) = 10

Then, we calculate the length of A'B':
L(A'B') = 3

Therefore, the scale factor is: L(A'B') / L(AB) = 3/10
4 0
3 years ago
Read 2 more answers
a real estate agent earns a commission of 4% of the selling price for each house he sells. How expensive of a house does he have
Vika [28.1K]

Given that rate of commission earned by the real estate agent = 4%

Given that required commission that real estate agents wants to earn = $7000.

Now we have to find about how expensive of a house does he have to sell to earn $7000.

So let the cost of house = $x

then commission earned = 4% of x

Given commision is $7000 so both quantities will be equal and we get equation:

4% of x = 7000

0.04x = 7000

x = 7000/0.04

x = 175000


Hence final answer is $175000.



8 0
3 years ago
two angles are supplementary the first angle measures 40 degrees what is the measurement of the second angle
pogonyaev
Supplementary angles add up to 180
40+x=180
x=140
5 0
3 years ago
Read 2 more answers
Please help, What is the nth term rule of the quadratic sequence below?<br> -4,1,12,29,52,81,116
Evgesh-ka [11]

Answer:

29-12 is a 17 difference

52-29 is a 23 difference (adding 6 to the number 17)

81-52 is a 29 difference (adding 6 to the number 23)

116-81 is a 35 difference (adding 6 to the number 29)

Step-by-step explanation:

7 0
3 years ago
if a man travels at an average speed of 122km per hour how far will he travel in 3 hours and 45 minutes​
Mekhanik [1.2K]
Convert 3h and 45 min to hours so it will be 3.9 hours

Then say:
Distance = speed ✖️time
= 122 km/h ✖️3.9h
=475.80 km
He will travel 475.80 km

Hope this helps ;)
5 0
2 years ago
Other questions:
  • A game board has a spinner with 10 equal sized sections of which 4 are green 3 are blue 2 are yellow and i is red what is the su
    15·1 answer
  • Terrence solves the problem and finds 53.04 x 4.6 = 2,439.84. Tara says that his product is incorrect. Fill in the blanks to hel
    9·1 answer
  • 6/15 in simplest form
    8·1 answer
  • What is the first derivative of 3\sqrt[3]{x^4}-12\sqrt[3]{x}?
    15·1 answer
  • At a certain factory, 10 percent of the staplers produced on monday were defective and 2 percent of the nondefective staplers we
    5·1 answer
  • In a sample of students, 12 out of 24 students in a class wanted a sandwich for lunch. Using the data from the sample, predict h
    10·1 answer
  • At a rugby match,the ratio of children to adults us 2:3. there are 80 children in the crowd. each adult ticket costs £8. each ch
    6·1 answer
  • I got 15, but apparently it isn’t the right answer. Help please!
    7·1 answer
  • Find value ill post the other stuff after u answer this​
    6·1 answer
  • Hello can you please help me with one or two please
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!