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
enot [183]
3 years ago
15

What is the value of (1+i) (1 - 1) 2 – 3 ?

Mathematics
2 answers:
nikitadnepr [17]3 years ago
8 0

Answer:

Step-by-step explanation:

(a + b)(a-b) = a² - b²

i² = -1

(1 + i)(1-i) = 1² - i²   = 1 - (-1) = 1 +1 = 2

\frac{(1+i)(1-i)}{2-3i}=\frac{2}{2-3i}\\\\=\frac{2*(2+3i)}{(2-3i)(2+3i)}\\\\=\frac{2*2+2*3i}{2^{2}-(3i)^{2}}\\\\=\frac{4+6i}{4-3^{2}*i^{2}}\\\\\frac{4+6i}{4-9*(-1)}\\\\=\frac{4+6i}{4+9}\\\\=\frac{4+6i}{13}\\\\=\frac{4}{13}+\frac{6}{13}i

fiasKO [112]3 years ago
7 0

Answer:

hi! your answer should be D

Step-by-step explanation:

I plugged the equation into a calculator and got D.

You might be interested in
Which statement is true? A. A sample statistic can never be equal to the population parameter. B. Point estimates are defined fo
stich3 [128]

Answer:

D

Step-by-step explanation:

7 0
3 years ago
2 7/8 divided by 2 1/4
trasher [3.6K]

2 7/8 = 23/8

2 1/4 =  9/4

23/8 / 9/4 =

23/8 * 4/9 = 92/72 = 1 20/72 =  1 5/18

5 0
3 years ago
Can someone please explain this by step by step? And give me the answer
AURORKA [14]

Answer:

we know that q=-18

So if we see the fraction below it says q/3

We know that q is -18

Therefore, you substitute it in for q and you get

-18/3 which equals -6

7 0
3 years ago
Can someone help thanks
Salsk061 [2.6K]
The equation for the volume of a pyramid is (l*w*h)/3
 
 since the problem gave you the base area, that would be the l *w

so now you would need to multiply the base area by the height, then divide by 3

16 * 15 = 240

240/ = 80 cubic centimeters

4 0
3 years ago
Convert the inequalities into equations, and then use the substitution method to find four possible vertices in the form (x, y,
alina1380 [7]

Answer:

For 2x + 5y <u>< </u>100, x + y <u><</u> 30. Vertices : (50,0) , (0,20) , (35,0) , (0,35) , (25,0)  

Step-by-step explanation:

Considering inequality equations

i) 2x + 5y <u>< </u>100 ;

ii) x + y <u><</u> 35

Concerting them to equality conditions

i) 2x + 5y =100.

Intercepts : If y = 0, x = 50. So, (50,0). If x = 0, y = 20. So, (0,20)

ii) x + y = 35. Intercepts :

Intercepts : If y = 0, x = 35. So, (35,0). If x = 0, y = 35 So, (0,35)

  • Solving them as per equality (with substitution)

From ii), x = 35 - y . Putting the value in i)

2 (35 - y) + 5y = 100 → 70 - 2y + 5y = 100 →  70 + 3y = 100

3y = 100 - 70 →  3y = 30 → y = 30 / 3 = 10

Putting y = 10 in ii) : x = 35 - 10 = 25

  • As per the 'less than' inequalities : the inner 'towards origin' area from both lines is in common shaded area.

Henceworth, <u>vertices </u>are : (50,0) , (0,20) , (35,0) , (0,35)  & intersection (25,0)

8 0
3 years ago
Other questions:
  • Evaluate 3|-4|<br><br>12 <br><br>4<br><br>-12​
    6·2 answers
  • I have a Brainliest reward
    6·1 answer
  • A climber who is 6 feet tall, casts a shadow that is 20 feet tall, at the same time that a tree casts a shadow which is 90 feet
    5·2 answers
  • Solve the system of linear equations by substitution. y−x=0y−x=0 2x−5y=9
    13·1 answer
  • What is the approximate distance between points A and B?
    7·2 answers
  • Give me the best answer
    6·1 answer
  • What is the value of the 7 in 3 478000? Answer..............​
    6·1 answer
  • Find the midpoint M of the line segment joining the points P = (-8, 3) and Q = (-2, -7).
    10·1 answer
  • Click the expression that is the additive inverse of 5/16.
    10·2 answers
  • What is the answer to x-5y=30 so I can graph it?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!