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ankoles [38]
3 years ago
6

PLEASE LOOK AT THE PICTURE I REALLY NEED HELP!!

Mathematics
1 answer:
Leno4ka [110]3 years ago
6 0

Answer:

B

Step-by-step explanation:

in complex numbers i²=-1

\frac{7-i}{3-i}= \frac{(7-i)(3+i)}{(3-i)(3+i)}= \frac{21+3i+7i+i^{2} }{3^{2} -i^{2} }= \frac{21+10i-1}{9+1}== \frac{20+10i}{10}=2+i

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Find value of x with the steps please
vagabundo [1.1K]

Answer:

x=7°

Step-by-step explanation:

The figure is a triangle.

1. Triangles's angles add up to 180°.

2. We know that 1 angle measures 104°, so the remaining 2 angles add up to 76°. It is an isosceles triangle, so both of the remaining 2 angles have equal measures.

3. 76÷2=38°.

4. 9x-25°=38°

5. 63°-25°=38°

6. 9x=63°

7. x=7°

<em>Step by step explanation above. Hope it is correct! </em>

8 0
3 years ago
If u is inversely proportional to the square of v and u is 4/9 when v is 3, find u when v is 8
LenKa [72]

Answer:u=1/16

Step-by-step explanation:

u is inversely proportional to v^2

u=k× 1/v^2

u=k/v^2

When U=4/9 when v=3

4/9=k×1/3^2

4/9=k×1/9

4/9=k/9

Cross multiply

4×9=k×9

36=9k

Divide both sides by 9

36/9=9k/9

4=k

When v= 8, u=?

u=k/v^2

Recall k=4

u=4/8^2

u=4/64

u=1/16

3 0
3 years ago
The ratio of boys to girls at a movie is 3:4 . If there are 16 girls ​, how many boys are at the​ movie?
Annette [7]

Answer:

12 boys

Step-by-step explanation:

  1. Set up a proportion: \frac{3}{4} = \frac{x}{16}  
  2. Cross multiply, then divide: 3 × 16 = 48, 48 ÷ 4 = 12

I hope this helps!

8 0
3 years ago
Read 2 more answers
K · (3.2 ÷ 4) = 1.6<br><br> k =
SVEN [57.7K]
K=2. You have to divide 3.2 by 4, then divide both sides by 0.8, finally, you have your answer, K=2.
3 0
3 years ago
Someone please help fast!<br> Simplify: in the picture
Fantom [35]

Answer:

-3ab

Step-by-step explanation:

-27/9= 3

(a^2)/a=a

(b^2)/b=b

3 0
2 years ago
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