Ask question

Ask question

All categories

3 years ago

10

Helpppppppppppp ASAP THANKS

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:

You might be interested in

There are 100 students in 11th grade at john d'obryant school of math & science in boston. 60 like basketball and 70 like te

Kryger [21]

I think 70 because playing on a varsity, i think, means to play both sports. So I added 10 to the number of students that play basket ball, which is also equal to the number of students that like tennis.

im not sure

7 0

3 years ago

Dylan is evaluating the expression 13 + 19 + 7 + 10. At one step in his work, Dylan rewrites the equation as 13 + 7 + 19 + 10. W

AlekseyPX

Answer:

Communicative Property

Step-by-step explanation:

The communicative property is basically just switching numbers around but still leading to the same answer, if you could see, both of the equations lead to the same answer, 49. Here is a chart to help you out.

7 0

3 years ago

Simplify 3^2 * 3^(-5). Express your answer as a fraction

murzikaleks [220]

Answer:

1 /27

1 over 27

Step-by-step explanation:

brainliest please?

3 0

2 years ago

Juan has $10. He recently got a job and now makes $9.15 an hour. He now has $760.30. How many hours has he worked?

marissa [1.9K]

Im not sure if im correct but I think the answer is 82 hours.

6 0

3 years ago

Read 2 more answers

A population of mice is increasing exponentially. On Monday there were 120 most. One month later there were 132 most. Ready func

djyliett [7]

Answer:

$y=120 * 1.1^x$ --- function

The monthly rate is 10%

Step-by-step explanation:

Given

Let

$x \to months$

$y \to mice$

So, we have:

$(x_1,y_1) = (0,120)$ --- Monday

$(x_2,y_2) = (1,132)$ --- One month later

Required

The function

The function is represented as:

$y=ab^x$

In $(x_1,y_1) = (0,120)$ , we have:

$120 = a * b^0$

$120 = a * 1$

$120 = a$

$a=120$

In $(x_2,y_2) = (1,132)$ , we have:

$132 = a * b^1$

$132 = a * b$

Substitute: $a=120$

$132 = 120 * b$

Solve for b

$b = \frac{132}{120}$

$b = 1.1$

So, the function is:

$y=ab^x$

$y=120 * 1.1^x$

To calculate the monthly rate (r), we have:

$y =a(1 + r)^x$

Compare to: $y =ab^x$

$1 + r = b$

Make r the subject

$r = b-1$

Substitute $b = 1.1$

$r = 1.1-1$

$r = 0.1$

Express as percentage

$r = 0.1*100\%$

$r = 10\%$

5 0

2 years ago