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Galina-37 [17]
3 years ago
11

How far away is a star with a parallax of 2 arc sec in parsecs? In AU?

Mathematics
1 answer:
Vesna [10]3 years ago
8 0

Answer:

ear

Step-by-step explanation:

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Which ordered pair is a solution of the equation 2x − y = 9?
Elodia [21]
You can try by plugging each ordered pair and seeing if the equation comes out true.

(5, 1)

2 * 5 - 1 = 9

That's correct so C is the correct answer.

6 0
3 years ago
Read 2 more answers
Evaluate the following expression using the values given:
erma4kov [3.2K]
The result of this question is -23
7 0
3 years ago
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What is the exact value of cos (67.5° )?
Brilliant_brown [7]

Answer:

0.38268343

Step-by-step explanation:

cos( 67.5 )

Rewrite  

67.5

as an angle where the values of the six trigonometric functions are known divided by  2 . cos ( 135\ 2)

Apply the cosine half-angle identity.

±

√

1

+

cos

(

135

)

2

 

Change the  

±

to  

+

because cosine is positive in the first quadrant.

√

1

+

cos

(

135

)

2

Simplify  

√

1

+

cos

(

135

)

2

√

2

−

√

2

2

The result can be shown in multiple forms.

Exact Form:

√

2

−

√

2

2

Decimal Form:

0.38268343

…

6 0
3 years ago
Find the quotient of 3/4 divided by 2/3
MrMuchimi

Answer:

1.125

Step-by-step explanation:

6 0
2 years ago
If x+y=10 and x-y =6 what is the answer of x cube - y cube fast​
AfilCa [17]

Answer:

x+y=10 which means that x=10-y

Replace 10-y in the other equation which gives you:

10-y-y=6

10-2y=6

-2y=-4

y=2

Replace 2 in any of the 2 equations same answer for both:

x+y=10

x+2=10

x=8

So,

{x}^{3} - y^{3}

=  {8}^{3}  -  {2}^{3}

=512-8

=504

Hope this helps!

4 0
2 years ago
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