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
Olin [163]
3 years ago
13

Multiplying complex number I need help on 7 & 8

Mathematics
1 answer:
Alexxandr [17]3 years ago
3 0

Answer:

7.  35i^2 - 46i + 15

8. -15i^2-i -40

Step-by-step explanation:

hope this helps. :)

You might be interested in
Anna buys dog food every 6 days and cat food every 9 days. If she buys both kinds of pet food today, in how many days will she n
jasenka [17]
Ndnfjfjdkfkdkdkskdksk
7 0
3 years ago
Read 2 more answers
What is the volume of a cube with an edge length of 3.2 meters?
Llana [10]
3,276.8 cm^3 or 32.768 m^3
3 0
2 years ago
Read 2 more answers
Find a unit vector in the direction of the vector left bracket Start 3 By 1 Matrix 1st Row 1st Column negative 8 2nd Row 1st Col
MrRissso [65]

Answer:

\left[\begin{array}{c}-\frac{8}{\sqrt{117} } \\\frac{7}{\sqrt{117} }\\\frac{2}{\sqrt{117} }\end{array}\right]

Step-by-step explanation:

We are required to find a unit vector in the direction of:

\left[\begin{array}{c}-8\\7\\2\end{array}\right]

Unit Vector, \hat{a}=\dfrac{\overrightarrow{a}}{|\overrightarrow{a}|}

The Modulus of \overrightarrow{a} =\sqrt{(-8)^2+7^2+(-2)^2}=\sqrt{117}

Therefore, the unit vector of the matrix is given as:

\left[\begin{array}{c}-\frac{8}{\sqrt{117} } \\\frac{7}{\sqrt{117} }\\\frac{2}{\sqrt{117} }\end{array}\right]

5 0
3 years ago
Paul has $78 in the bank and saves $30 each week. What is the initial value? Be sure to use negative signs if needed.
marin [14]

Answer:

The initial value is $78

Step-by-step explanation:

Given

Base\ Amount = \$78

Additional = \$30 (weekly)

Required

Determine the initial value

The initial value is the amount he has in its bank account before making his weekly savings.

From the question, we have that his initial balance is $78.

Hence, the initial value is $78

However, his weekly balance can be expressed as:

Balance = Base\ Amount + Additional * number\ of weeks

Represent number of weeks with x; So, we have:

Balance = 78 + 30 * x

Balance = 78 + 30 x

6 0
2 years ago
The violin was on sale for 50% off sale price is $50 what was the original sale price
zhenek [66]

Answer:100$

Step-by-step explanation: since the violin was 50 % off, that just means that the price it is is half of what it normally was , so you just multiple the fifty by 2 to get your answer which is that the violin cost 100$

7 0
3 years ago
Read 2 more answers
Other questions:
  • the counter on a tape recorder registers 520 after the recorder has been running for 20 minutes. what would the counter register
    14·1 answer
  • Prove that the lengths of the diagonals of an isosceles trapezoid are equal
    9·1 answer
  • What is the answer to x+4=6 1/4=
    10·1 answer
  • Subrina eats###### pizza a week and have #### with alan
    14·1 answer
  • An investment of ​$100 comma 000 was made by a business club. The investment was split into three parts and lasted for one year.
    5·1 answer
  • Pls help me on number 14
    13·1 answer
  • PLZ HELP Due in an hour!
    10·1 answer
  • 1. 3x - 5&lt; 19<br> 3x - 5+&lt;19+<br> 38 &lt;<br> 3x :<br> x&lt;
    7·1 answer
  • What factors do 16 and 44 have in<br> common?
    13·2 answers
  • PLEASE HELP!!!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!