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
Andrew [12]
2 years ago
12

What is the sum of the complex numbers 2 + 4i,and 3 − 7i, where i=-1

Mathematics
2 answers:
Elodia [21]2 years ago
5 0

Answer:

5 - 3i.

Step-by-step explanation:

2 + 4i + 3 - 7i       Bring like terms together:

= 2 + 3 + 4i - 71

= 5 - 3i.

Ket [755]2 years ago
4 0

Answer:

5 - 3i

Step-by-step explanation:

Real numbers are a subset of the complex numbers. Therefore it would only make sense that the complex numbers follow the same rule of additivity and multiplication as real numbers do:

(2+4i)+(3-7i)=2+3+4i-7i=5-3i

You might be interested in
Use the table to find the residual points. A 4-column table with 5 rows. The first column is labeled x with entries 1, 2, 3, 4,
Readme [11.4K]

Answer:

What is the change for each consecutive input?

✔ 1

What is the change for each consecutive output?

✔ 0.35

What is the rate of change for the relationship?

✔ 0.35

Step-by-step explanation:

The change for each input is 1 beacause the inputs are 10,11,12,13

The change for each consecutive output is 0.35 beacuse we need to subtract 4.1 from 3.75

The rate of change for the relationship is also 0.35

8 0
4 years ago
explain how you could use the construction tool or a compass and straightedge to create a line segment that is twice as long as
Sergeu [11.5K]

Answer:

Use a compass to measure the length of AB.

Draw an arc from point B (or point A) with that distance.

Extend line AB through that arc and label the intersection as point C.

AC is twice the length of AB.

6 0
3 years ago
Help me out please its with triangles and stuff
OverLord2011 [107]

Answer:

11 in = 33 in.

Step-by-step explanation:

6 in. = 18 in.

the second triangle is 3 times bigger than the smaller one.

7 0
3 years ago
Read 2 more answers
1-cos2a/1+cosa if 1/3 how much sin²a
Helen [10]

Answer:

(1-cos2A) /(1+cos2A) =tan²A

Proof:

We know that,

cos(A+B) =cosA.cosB-sinA.sinB

=>cos2A=cos(A+A)

=>cos2A=cosA.cosA - sinA.sinA

=>cos2A=cos²A-sin²A

=>cos2A=(cos²A-sin²A)/(cos²A+sin²A

Since {cos²A+sin²A=1}

Divide the numerator & the denominator by (cos²A) to get,

cos2A = {(cos²A-sin²A) ÷cos²A} / {(cos²A+sin²A) ÷cos²A}

cos2A ={(1-tan²A)/(1+tan²A)}

Then,

1-cos2A = 1-[{(1–tan²A)/(1+tan²A)}]

1-cos2A =(1+tan²A-1+tan²A)/(1+tan²A)

1-cos2A=(2tan²A)/(1+tan²A)

And now.......

1+cos2A=1+[{(1-tan²A)/(1+tan²A)}]

1+cos2A={1+tan²A+1-tan²A}/{1+tan²A}

1+cos2A=2/(1+tan²A)

So now,

(1-cos2A)/(1+cos2A)= {2tan²A/(1+tan²A)}÷{2/(1+tan²A)}

={(2tan²A)(1+tan²A)}÷{2(1+tan²A)}

=tan²A

Step-by-step explanation:

make me as brain liest

3 0
4 years ago
Some1 help pls and ty​
joja [24]

Answer:

b=4 x A

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • On her pogo stick lula made 24 hops in 30 seconds at this rate how many hops in 50 seconds
    12·2 answers
  • WILL MAKE BRAINLIEST!!
    15·2 answers
  • PLS HELP I REALLY NEED IT
    5·2 answers
  • Cassie is a half pound of sugar in her cabinet her cake recipe calls for two tenths of a pound of sugar how many cakes can she m
    14·1 answer
  • Use the linear combination method to solve the system of equations. <br> 2a=6−2 <br> 2a+3b=16
    13·1 answer
  • Answer needed asap...
    13·1 answer
  • At a meeting of 10 executives
    5·1 answer
  • Can someone help me!?
    7·1 answer
  • F(x)=12(x-10)2+18<br><br> What is the "a" value of this function?
    15·2 answers
  • Which rule can be used to describe the growth of the y-values of the function y=12^(x) each interval from x=-1 to x=3
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!