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
drek231 [11]
2 years ago
8

Subtract the complex numbers: (-2 + 12i) - (-1 - 9i)

Mathematics
2 answers:
jasenka [17]2 years ago
8 0

Answer:

B. -3 + 3i

Step-by-step explanation:

Using the foil method:

-2 - 1 = -3

12i - 9i = 3i

= -3 + 3i

Andrew [12]2 years ago
3 0

9514 1404 393

Answer:

  C)  -1 +21i

Step-by-step explanation:

For many purposes, "i" can be treated as though it is a variable. Collect terms in the usual way.

  (-2 +12i) -(-1 -9i) . . . . given

  = -2 +12i +1 +9i . . . . use the distributive property to eliminate parentheses

  = (-2+1) +(12i +9i) . . . group like terms

  = -1 +21i

You might be interested in
Mark has a checking account. His opening balance on 1/7 was $110. The bank charges a 25¢ fee for each debit card transaction and
ipn [44]
110+30-(15+0.25)+40-(8+0.25)=156.5
7 0
2 years ago
An annual pass to the Super Fun theme
MariettaO [177]

Answer:

Step-by-step explanation:

X=4

7 0
3 years ago
Marco paid $36.89 for 8.6 gallons of gas.  What is the price per gallon?
Semenov [28]
36.89 total divided by the 8.6 gallons he bought = 4.2 so the price per gallon would be $4.20
6 0
3 years ago
Read 2 more answers
If 6 bags of chocolate chips are needed to make 86 cookies, how many cookies can 8 bags chocolate chips make?
gulaghasi [49]

Answer:

114.666666667

Step-by-step explanation:

Step 1:

6/86 = 8/x        Equation

Step 2:

6x = 688        Multiply

Step 3:

x = 688 ÷ 6    Divide

Answer:

x = 114.666666667

Hope This Helps :)

4 0
3 years ago
Kyle and Leah both work in the evenings. Leah
MA_775_DIABLO [31]

Answer:

The awnser is March 15th because every 12 days they are off at the same time

Step-by-step explanation:

<h2>BRAINLIEST PLEASE</h2>
4 0
3 years ago
Other questions:
  • 10x — 12y = 6<br> 5х – бу=3
    11·1 answer
  • Each morning papa noted the birds feeding on his birdfedder . So far this month he had seen 59 blue jays ,68 black crows , 12 re
    11·1 answer
  • Jack rides A bike 8 miles and 3/4 of an hour . Use Vocabulary for unit rates and fractions to explain how to find jacks speed in
    8·1 answer
  • Jill converted the equation of the line 15x-4y=-2 into slope-intercept form and found the slope and y-intercept of the line
    8·1 answer
  • Choose all of the expressions that are equal to −9. the opposite of nine −|9| |−9| −|−9| −(−9) the distance from zero to nine
    5·1 answer
  • What is the measurement of the vertex angle of an isosceles triangle if one of its base angles measures 42 degree
    13·1 answer
  • When Steve woke up. His temperature was 102º F. Two hours later it was 3º lower. What was his temperature then?
    7·1 answer
  • Please help 7th grade math question
    13·1 answer
  • Amber works as a waitress at a restaurant. She earns an hourly wage and also earns tips. One night, she worked 6 hours and earne
    14·1 answer
  • How did the federal government try to protect the rights of blacks during congressional Reconstruction?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!