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soldier1979 [14.2K]
1 year ago
12

Which of the following is a square root of 3 (cosine (StartFraction 4 pi Over 9 EndFraction) + I sine (StartFraction 4 pi Over 9

EndFraction) )?
Mathematics
1 answer:
kiruha [24]1 year ago
3 0

Answer:

D

Step-by-step explanation:

edge

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WILL MARK BRAINLIEST IF YOU ANSWER BOTH QUESTIONS WITH SOLUTION
11Alexandr11 [23.1K]

Answer:

1. = 3xy + x - 2y - 4

2. = d^2(2c^3-8c^2d+3d^2)

Step-by-step explanation:

= 9x^2y^2 + 3x^2y - 6xy^2 - 12xy/3xy

First factor the top equation ….

= 3xy(3xy + x - 2y - 4)/3xy

If the top and the bottom both carry 3xy, you can cancel out both of them leaving you with ….

= 3xy + x - 2y - 4

= -16c^6d^6 + 64c^5d^7 - 24c^3d^8/-8c^3d^4

First factor the top equation ....

= -8c^3d^6(2c^3-8c^2d+3d^2)/-8c^3d^4

If the top and the bottom both carry -8c^3 you can cancel out both of them leaving you with ….

= <u>d^6</u>(2c^3-8c^2d+3d^2)/d^4

Apply the exponent rule with d^6 ....

= <u>d^4</u><u>d^2</u>(2c^3-8c^2d+3d^2)/d^4

cancel out d^4 ....

= d^2(2c^3-8c^2d+3d^2)

8 0
2 years ago
An item is regularly priced at 90$. Itis now priced at a discount of 30% off the regular price. What is the price now ?
frez [133]
If ur getting 30% off, then ur paying 70%
70% of 90...

0.7(90) = 63 <== discount price
8 0
4 years ago
Read 2 more answers
Help me find the value of X
RideAnS [48]

Answer:

B.  x =  53 degrees.

Step-by-step explanation:

The external angles of all polygons add up to 360 degrees, so:

x +  120 + 90+ 97 = 360

x = 360 - 90 - 120 - 97

x =  53 degrees.

8 0
3 years ago
| 2x + 2y = 10<br> y = 5+x
melisa1 [442]
2x + 2(5+x)=10
2x+10+2x=10
4x+10=10
4x=0
X=0
6 0
3 years ago
Select the expression that has a value of 4
Harrizon [31]

Answer:

The answer is letter D.

Step-by-step explanation:

320/80

=4

4 0
3 years ago
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