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belka [17]
3 years ago
5

(6 - 1) + (3m)i = -12 + 27i

Mathematics
1 answer:
Yanka [14]3 years ago
8 0

Answer:

We want to solve the equation:

(6 - 1) + (3m)i = -12 + 27i

Where m is a complex number.

first, we can rewrite this as:

5 + 3*m*i = -12 + 27*i

3*m*i = -12 - 5 + 27*i

3*m*i = -17 + 27*i

And we can write m as:

m = a + b*i

Replacing that in the above equation we get:

3*(a + b*i)*i = -17 + 27*i

3*a*i + 3*b*i^2 = -17 + 27*i

and we know that i^2 = -1

3*a*i - 3*b = -17 + 27*i

The real part in the left (-3*b) must be equal to the real part in the right (-17)

then:

-3*b = -17

b = -17/-3 = 17/3

And the imaginary part in the left (3*a) must be equal to the imaginary part in the right (27)

then:

3*a = 27

a = 27/3.

Then the value of m is:

m = a + b*i = (27/3)  + (17/3)*i

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Answer:

  $17,321.43

Step-by-step explanation:

The amount of monthly income from commissions would have to be ...

  $2100 -975 = $1125

This is 7% of sales over $1250, so the sales (s) would need to be ...

  1125 = 0.07(s -1250)

  1125 = .07s -87.50 . . eliminate parentheses

  1212.50 = 0.07s . . . . add 87.50

  17,321.43 = s . . . . . . . divide by 0.07

He would have to sell $17,321.43 in a month if he needed an income of $2100.

8 0
3 years ago
(7-4n) x 6= I need the answer as quick as possible
Paraphin [41]

Answer:

42 - 24n

Step-by-step explanation:

(7-4n)  6

Distribute

7*6 - 4n*6

42 - 24n

4 0
3 years ago
Read 2 more answers
keisha got a fish tank. It fits on table that is exactly 10 inches wide and 12 inches long. When the tank is filled, it can hold
MatroZZZ [7]

Answer: 15 inches is the height of Keisha's fish tank.

Step-by-step explanation: Basically, multiply your length x width, which is 12 x 10. 12 x 10 = 120.

Next, divide 1800 by 120.

1800 divided by 120 is 15.

So, 15 inches is the height of the fish tank.

5 0
3 years ago
CAN SOMEONE HELP ME PLSSS THIS IS THE END OF THE YEAR TEST AND ITS DUE TODAY
sammy [17]

Answer:

I gotchu <333

Step-by-step explanation:

A: y = 0.50x + 5

(y= total amount of money)

(+5 = birthday money)

B: (25) = 0.50x+5

   -5                  -5

--------------------------------

                20 = 0.50x                gilberto needs to get 40 correct answers

(divided) / 0.50    /0.50

-------------------------------------

40 = x          

C:

y= 0.50 (12) + 5                gilberto will recieve 11 dollars !

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y = 11

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3 years ago
Factorise completely:<br> 1. 3xy - x<br>2. 4a² - 9​
Amanda [17]

Answer:

x(3y - 1) and (2a - 3)(2a + 3)

Step-by-step explanation:

(1)

3xy - x ← factor out x from each term

= x(3y - 1)

(2)

4a² - 9 ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b) , then

4a² - 9

= (2a)² - 3²

= (2a - 3)(2a + 3)

6 0
3 years ago
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