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Svet_ta [14]
3 years ago
15

For the complex number z = Negative StartFraction StartRoot 21 EndRoot Over 2 EndFraction minus StartFraction StartRoot 7 EndRoo

t Over 2 EndFraction i, what is arg(z)? 150° 210° 240° 330°
Mathematics
2 answers:
Rus_ich [418]3 years ago
7 0

Answer:

210

Step-by-step explanation:

gogolik [260]3 years ago
3 0

Answer:

210

Step-by-step explanation:

EDGE 2020

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What are all the refernce angles to pi/6
kaheart [24]

Construction of the angle pi/6=30 degrees produces a 30-60-90 triangle, which has angles  theta=pi/6 and 2theta=pi/3.

Step-by-step explanation:

7 0
4 years ago
A monument in the shape of a right triangle sits on a rectangular pedestarl that is 7 meters high by 16 meters long. The longest
Minchanka [31]

Answer: 70 meters

Step-by-step explanation:

Hi, since the situation forms a right triangle and a rectangle, we have to apply the Pythagorean Theorem (for the triangle)

c^2 = a^2 + b^2  

Where c is the hypotenuse of the triangle (the longest side) and a and b are the other sides.  

Replacing with the values given:  

65^2 = 16^2 + x^2  

4,225 = 256 + x^2

4,225-256 = x^2

3,969=x^2

√3,969 =x

63=x

We have calculated the missing side of the triangle, now we have to add the height of the rectangle:

63 +7 =70 meters

Feel free to ask for more if needed or if you did not understand something.  

4 0
3 years ago
2X -5+3a - 5X +2a<br> Help
Katen [24]

Answer:

1. 2x can be seen as +2x therefore when you put it as +2x-5x the answer will be - 3x

2. +3a+2a also equals +5a

3. - 5 is left alone and there is no other similar expression

Put them together the answer becomes

-3x+5a-5

It doesn't have to be the same order of format but the numbers must be as such

6 0
2 years ago
When can a parallelogram also be called a rectangle?
Marta_Voda [28]

Answer:

see explanation

Step-by-step explanation:

A rectangle is is a type of parallelogram with four right angles.

7 0
4 years ago
Read 2 more answers
11/9 = 55/n <br><br> n=<br><br> HELP PLEASEEEEE
castortr0y [4]

Answer:

n = 45

Step-by-step explanation:

Step 1: Cross-multiply.

  • \frac{11}{9}  = \frac{55}{n}
  • 11 * n = 55 * 9
  • 11n  = 495

Step 2: Divide both sides by 11.

  • \frac{11n}{11} = \frac{495}{11}
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3 0
3 years ago
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