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
yKpoI14uk [10]
3 years ago
7

How do you simplify #(-3 - 2i)(-3 + 3i)#?

Mathematics
1 answer:
dybincka [34]3 years ago
7 0
So, ( -3 - 2i )( -3 + 3i ) = 9 - 9i +6i - 6i^2 = 9 - 3i - 6·(-1) = 9 + 6 - 3i = 15 - 3i;
We have / 15 +(- 3)i / = 15.29;\sqrt{ 15^{2} +  (-3)^{2}  } =  \sqrt{225 + 9} =  \sqrt{234} =
You might be interested in
20. Lee uses Bill Payer from his bank account to pay his internet bill. Lee pays the same amount each month.
NARA [144]
It's the same amount each month, for a year. So:
total money ÷ times money was taken out= how much has been taken out.

$600÷12=50
3 0
3 years ago
Which triangle is a right triangle?
iren [92.7K]

Answer:

A right triangle is always 90 degrees.

Step-by-step explanation:

4 0
3 years ago
(7)(8)(9)<br><br> Geometry<br><br> Check Ans<br><br> 7) s = 15<br> 8) y = 64 x = 99<br> 9) 96
Katyanochek1 [597]
Problem 7: Correct
Problem 8: Correct
Problem 9: Correct

The steps are below if you are curious

===========================================================================================

Problem 7

S = 180*(n-2)
2340 = 180*(n-2)
2340/180 = n-2
13 = n-2
n-2 = 13
n = 13+2
n = 15

I'm using n in place of lowercase s, but the idea is the same. If anything, it is better to use n for the number of sides since S already stands for the sum of the interior angles. I'm not sure why your teacher decided to swap things like that.

===========================================================================================

Problem 8

First find y
y+116 = 180
y+116-116 = 180-116
y = 64

which is then used to find x. The quadrilateral angles add up to 180*(n-2) = 180*(4-2) = 360 degrees
Add up the 4 angles, set the sum equal to 360, solve for x

x+y+125+72 = 360
x+64+125+72 = 360 ... substitution (plug in y = 64)
x+261 = 360
x+261-261 = 360-261
x = 99

===========================================================================================

Problem 9

With any polygon, the sum of the exterior angles is always 360 degrees

The first two exterior angles add to 264. The missing exterior angle is x
x+264 = 360
x+264-264 = 360-264
x = 96

6 0
3 years ago
Draw two different shapes with a perimeter of 16 units. What is the area of each shape?
Nadusha1986 [10]

<u>Shape #1:  A square.</u> 
Every side is  4  units long. 
The perimeter is  16  units.
The area is  <em>16  </em>square units.

<u>Shape #2:  A rectangle.</u>
The length is  7.9  units.
The width is  0.1  unit.
The perimeter is  16  units.
The area is  <em>0.79</em>  of a square unit.

<u>Shape #3:  A circle.</u>
The diameter is  (16/π)  units.  (about  5.093  units)
The perimeter (circumference) is 16 units.
The area is  (64/π)  square units.          (about  <em>20.37</em>  square units)


8 0
3 years ago
Read 2 more answers
Name three other real-world situations where a strategy, "plan of attack, or
Dmitry_Shevchenko [17]

Answer:

1.

Planning a wedding .

2.  

A huddle in and practice before a football game.

3.

The passing of a Constitutional Amendment.

8 0
3 years ago
Other questions:
  • use the rational zeros theorem to write a list of all potential rational zeros of the function f(x)=3x^2 +39x^2+39x +27
    9·1 answer
  • Please help in this math question
    10·1 answer
  • Ray BD bisects ∠ABC so that m∠ABD = 5y – 3 and m∠CBD = 2y +12. Find the value of y.
    13·1 answer
  • Miley earns $10 per hour babysitting. Is the amount of money earned proportional to the number of hours she spends babysitting?
    7·1 answer
  • What is the sum of all of the perfect squares between
    5·1 answer
  • How would you go about solving this? This is the half angle and double angle identities unit if that helps
    14·1 answer
  • The student store sells pencils for $0.75 each and erasers for $0.25 each. A student can buy a bundle that consists of 2 pencils
    7·1 answer
  • Solve for T <br> D = RT <br> PLZ HELP
    15·2 answers
  • The principal ordered 4 pizzas for the 12 students of the month.if each pizza has 8 pieces,what is the ratio of pieces of pizza
    10·2 answers
  • How do you write 0.050 in scientific notation?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!