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
oee [108]
2 years ago
13

(6+9i)(6-9i) How to solve?

Mathematics
1 answer:
AlekseyPX2 years ago
5 0

~~(6+9i)(6-9i)\\\\=6^2-(9i)^2~~~~~~~~~~~~~~~~~~~;[a^2-b^2 =(a+b)(a-b)]\\\\=36-81i^2\\\\=36-81(-1)~~~~~~~~~~~~~~~~;[i^2 = -1]\\\\=36+81\\\\=117

You might be interested in
work out the circumference of this circle take pie to be 3.142and give your number to 1 decimal place and the radius is 11.2cm
harina [27]
Circumference is 2*pi*r
2 * 3.142 * 11.2 = 70.3808, to 1 decimal place is 70.4cm^2
6 0
3 years ago
Read 2 more answers
What is the benchmark fraction of 7/10 x 16
Tomtit [17]
Lets change "16" by its to 16/1 .. since nothing can't help support 16 by itself when it is going into 7/10

Now that we change that ... your problem becomes 7/10 × 16/1

7/10 × 16/1 = 11 1/5

Because
7(16) / 10(1) = 112/10
Now lets go. to how we solve the for the answer

112/10 = 11 1/5


☺


6 0
3 years ago
For number five I need help plz help
bonufazy [111]

1. 1000 2. 0.001. hope this helps.

6 0
3 years ago
Helpp
Svetach [21]

Answer:

<h3>21mi/gn</h3>

Step-by-step explanation:

<h3>7mi/1/3gncalculate the product</h3>

7mi/gn/3simplify the complex fraction

<h3><em>So </em><em>the </em><em>answer </em><em>is=</em><em>2</em><em>1</em><em>m</em><em>i</em><em>/</em><em>gn</em></h3>

<h3><em>Hope </em><em>it </em><em>helps</em></h3>
6 0
2 years ago
The original price is $60.The sales price is $45. What is the percent of discount?
MariettaO [177]
Hey there!

To start, first subtract 45 from 60 to find the amount of money taken off from the discount:
60-45
=15

Because 15 dollars have been taken off the original price, you can find the percent of discount by setting up this proportion where x represents the percent of discount:
15/60=x/100

Now, cross multiply and solve for x:
1500=60x
x=25

Therefore, your discount would be 25%.

Hope this helps and have a marvelous day! :)
5 0
3 years ago
Other questions:
  • Help plz thankssssss
    8·1 answer
  • What are the angle measures of triangle ABC?
    6·1 answer
  • what is an equation in point-slope form for the line that passes through the points (1,-2) and has a slope of 3
    15·2 answers
  • 13x – 51<br> 10x - 33<br> find bc
    15·1 answer
  • The base area of the prism is 120 square feet. Its height is 5 feet what is the volume of the prism.
    5·1 answer
  • Find the product. (a^2 b^3)^4
    11·2 answers
  • Simone claims that the slope of the line through (-2, 7) and (3, 0) is the same as the slope of the line through (2, 1) and (12,
    7·1 answer
  • Please answer PLEASE
    8·2 answers
  • Find the volume of a pyramid with a square base, where the perimeter of the base is 10.7\text{ ft}10.7 ft and the height of the
    15·1 answer
  • The circumference of a circle is 25π cm. What is the area, in square centimeters? Express your answer in terms of \piπ.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!