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Sloan [31]
3 years ago
14

Please answer!!!!!!!!!!!

Mathematics
1 answer:
Marta_Voda [28]3 years ago
5 0

Answer:

the second one

Step-by-step explanation:

qudrant lv

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Write the following quotient in the form a+bi.<br> -7i/2-7i
Helga [31]

Answer:

\large\boxed{\dfrac{49}{53}-\dfrac{14}{53}i}

Step-by-step explanation:

\text{Use}\\\\i=\sqrt{-1}\to i^2=-1\\\\(a-b)(a+b)=a^2-b^2\to(a-bi)(a+bi)=a^2+b^2\\\\\text{distributive property}\ a(b+c)=ab+ac\\---------------------\\\\\dfrac{-7i}{2-7i}=\dfrac{-7i}{2-7i}\cdot\dfrac{2+7i}{2+7i}=\dfrac{-7i(2+7i)}{2^2+7^2}=\dfrac{(-7i)(2)+(-7i)(7i)}{4+49}\\\\=\dfrac{-14i-49i^2}{53}=\dfrac{-14i-49(-1)}{53}=\dfrac{-14i+49}{53}\\\\=\dfrac{49}{53}-\dfrac{14}{53}i

8 0
3 years ago
Read 2 more answers
10. To which subsets of the real numbers does the number √7 belong?
Lunna [17]

10. √7=irrational numbers

11.

15x - 20

------------   =   15x-4

5

5 0
3 years ago
100 = 10 x + 6
ohaa [14]

Answer:

D

Step-by-step explanation:

6x + 10 = 100

6 times 15 = 90

Add 90 + 10 = 100

8 0
3 years ago
What percent of 200 is 0.5?
Archy [21]
0.25% = 0.5/200
hope this helps!

make me brainliest please if possible :)
7 0
4 years ago
What’s y = x +-2 -76
MA_775_DIABLO [31]

Answer:

y = x - 78

Step-by-step explanation:

y = x +-2 -76

y = x -78

7 0
3 years ago
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