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3 years ago

Helpppppppppppp ASAP THANKS

Mathematics

2 answers:

sergiy2304 [10]3 years ago

7 0

$(2+i)^3=(i+2)^3$ ↝ Properties

$(x+y)^3=x^3+3x^2y+3xy^2+y^3\\(i+2)^3=i^3+3(i)^2(2)+3(i)(2)^2+2^3\\(i+2)^3=i^3+6i^2+12i+8$

Proceed with define of complex number.

$i=\sqrt{-1}\\i^2=-1\\i^3=-i\\i^4=1$

$-i-6+12i+8\\2+11i$

Therefore, the answer is 2 + 11i

strojnjashka [21]3 years ago

4 0

Answer:

c or d

Step-by-step explanation:

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Question 3 (1 point)

Virty [35]

Answer:

The answer to your question is (4, 6)

Step-by-step explanation:

Data

E ( 9 , 7 )

F ( - 1, 5)

Formula

$Xm = \frac{x1 + x2}{2}$

$Ym = \frac{y1 + y2}{2}$

Substitution and simplification

$Xm = \frac{9 -1}{2}$

$Xm = \frac{8}{2}$

Xm = 4

$Ym = \frac{7 + 5}{2}$

$Ym = \frac{12}{2}$

Ym = 6

Result

(4 , 6)

7 0

3 years ago

The owner of a bookstore asked her regular customers to rank 3 items from a list of products that she would like to bring to the

Mazyrski [523]

40 ways. 6!/3!(6-3)! =120. We are only trying to find 3 ways. 120 is the total, 120/30 =40. So 40 is the answer.

7 0

2 years ago

Read 2 more answers

A book has 12 chapters. The mean length of the chapters is 40 pages. How many total pages are there in the 12 chapters?

amm1812

Answer:

480

Step-by-step explanation:

Important Information:

A Book Has 12 Chapters.

The Mean length of the chapters is 40 pages.

Question to Answer:

How many total pages are there in the 12 chapters?

Explanation/Solution:

Let's assume that the total number of pages in the book is "x" pages.

To find the mean (average) we divide the total "x" by 12 because there are 12 chapters in the book, which would equal to 40.

$\frac{x}{12}$ =40

Multiply both sides by 12...

x = 480

Hence, The total number of pages in the 12 chapters is 480.

7 0

2 years ago

In the number 97.68 which digit is 10 times the value of the 6

Anon25 [30]

Answer:

The 6 is in the tenths place and the 7 is in the ones place.

8 0

3 years ago

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Fifteen percent of the students in seventh grade at western middlr school have perfect attendance. There are 220 students in sev

Degger [83]

Answer:

33 students

Step-by-step explanation:

Fifteen percent of the students in seventh grade at western middle school have perfect attendance. There are 220 students in seventh grade. How many have perfect attendance?

Fifteen percent in decimal from is 0.15.

You would then multiply that by the number of students; 220.

.15 * 220 =

One multiplied, you get 33.

Therefore, 33 students have perfect attendance.

8 0

2 years ago