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BARSIC [14]
2 years ago
12

(-3+7i)(1-2i) can you help me with the answer to this

Mathematics
1 answer:
lozanna [386]2 years ago
4 0

Answer:

11 + 13i

Step-by-step explanation:

A must know is that

\sqrt{i}  =  - 1

Complex numbers

1st: foil the equations

- 3(1 - 2i) + 7i(1 - 2i)

- 3 + 6i + 7i- 14 {i}^{2}

2nd Combine like terms and substitute

i ^{2} for \:  - 1

- 3 + 14  + 13i

11  +  13i

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Please help with this<br>​
tankabanditka [31]

Answer:

x=3

Step-by-step explanation:

y= -2

4x-3y=18

4x-3(-2)=18

4x-(-6)=18

4x+6=18

4x+6-6=18-6

4x=12

\frac{4x}{4} =  \frac{12}{4}

x=3

If its helpful ❤❤❤

THANK YOU

6 0
3 years ago
Write a real word problem that can be represented by the expression 5x+10
trasher [3.6K]
A member ship at the gym cost 5 dollars a month plus a locker holding fee of 10 dollars 
3 0
3 years ago
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Suatu jenis roti memerlukan 150 gram tepung dan 50 gram mentega. Roti jenis lain memerlukan 75 gram tepung dan 75 gram mentega,
Katena32 [7]
Let the one type of the bread be bread A
The second type of the bread be bread B

Let the flour be 'f' and the butter be 'b'

We need 150f + 50b for bread A and 75f + 75b for bread B

We can compare the amount of flour and bread needed for each bread and write them as ratio

FLOUR

Bread A : Bread B
150 : 75
2 : 1

We have a total of 2250gr of flour, and this amount is to be divided into the ratio of 2 parts : 1 part. There is a total of 3 parts. 

2250 ÷ 3 = 750 gr for one part then multiply back into the ratio to get

Bread A : Bread B = (2×750) : (1×750) = 1500 : 750


BUTTER

Bread A : Bread B = 50 : 75 = 2 : 3

The amount of butter available, 1250 gr is to be divided into 2 parts : 3 parts.
There are 5 parts in total

1250 ÷ 5 = 250 gr for one part, then multiply this back into the ratio 

Bread A: Bread B = (2×250) : (3×250) = 500 : 750

Hence, for bread A we need 1500 gr of flour and 500 gr of butter, and for bread B, we need 750 gr of flour and 750 gr of butter.


3 0
3 years ago
Read 2 more answers
Write the equation of the line that passes through the points (1, 1) and (2, 4). Write your answer in slope-intercept form
navik [9.2K]

Answer:

The answer in slope-intercept form is y = 3x - 2.

8 0
3 years ago
The Hoskins family spend $600 per month on groceries for their family. If this is 15% of their monthly budget, what is there mon
Varvara68 [4.7K]

Hi!

We will find the monthly budget using proportions, like this:

15% = 0,15___________600$

100% = 1_____________x$

__________________________

x = (600*1)/0,15

x = 600/0,15

x = 4000

Their monthly budget is 4000$.

Hope this helps!

5 0
3 years ago
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