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3 years ago

_y-2x-2 help pls I will give brainlist!!!

Mathematics

1 answer:

ICE Princess25 [194]3 years ago

4 0

Answer:

The top right.

Step-by-step explanation:

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Simplify (Are all division) 2+4i 3i 3+2i 4+i 2i^11

Alla [95]

$We\ know:\ i=\sqrt{-1}\to i^2=-1$

$\dfrac{2+4i}{3i}=\dfrac{2+4i}{3i}\cdot\dfrac{3i}{3i}=\dfrac{6i+12i^2}{9i^2}=\dfrac{6i+12(-1)}{9(-1)}\\\\=\dfrac{6i-12}{-9}=\dfrac{2i-4}{-3}=\dfrac{4}{3}-\dfrac{2}{3}i$

$\dfrac{3+2i}{4+i}=\dfrac{3+2i}{4+i}\cdot\dfrac{4-i}{4-i}=\dfrac{(3+2i)(4-i)}{4^2-i^2}\\\\=\dfrac{(3)(4)+(3)(-i)+(2i)(4)+(2i)(-i)}{16-(-1)}=\dfrac{12-3i+8i-2i^2}{16+1}\\\\=\dfrac{12+5i-2(-1)}{17}=\dfrac{12+5i+2}{17}=\dfrac{14+5i}{17}=\dfrac{14}{17}+\dfrac{5}{17}i$

$2i^{11}=2i^{10+1}=2i^{10}i^1=2i^{2\cdot5}i=2i(i^2)^5=2i(-1)^5=2i(-1)=-2i$

$Used:\ (a+b)(a-b)=a^2-b^2$

6 0

3 years ago

PLZ SHOW HOW U WORKED IT OUT

elixir [45]

22.5 times 1,000,000
22,500,000 in mm
22,500 meters and
22.5 kilometers

6 0

3 years ago

2x + y = 3

sergejj [24]

Hey there!

First, multiply the second equation by -2 as the problem states. When you multiply the second equation by -2, you get:

-2x+4y=2

Now, add this equation to the first equation in which you simply combine like terms:

2x+y=3

-2x+4y=2

5y= 5

In conclusion, the correct answer would be the first choice.

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3 years ago

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There are 600 seatsin a auditorium.450 people are coming. Meals for 3/4 of the 600 are prepared. Dessert for 5/8 of the 600 are

abruzzese [7]

Answer:

idk

Step-by-step explanation:

4 0

3 years ago

Rename fraction 2/5 so you can add it to 11/25. Find the sum.

Slav-nsk [51]

$\frac{2}{5}+ \frac{11}{25}=x \\ \\ \frac{(5)2}{(5)5} + \frac{11}{25} \\ \\ \frac{10}{25} + \frac{11}{25} \\ \\ \frac{10+11}{25} \\ \\ \boxed { \frac{21}{25}}$

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3 years ago

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