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ivanzaharov [21]
3 years ago
15

Evaluate each expression if x=9 and y= 3. please help

Mathematics
1 answer:
Lemur [1.5K]3 years ago
7 0

Answer: 43. -46  44. 756     45. 6433

Step-by-step explanation:

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Marat540 [252]

9514 1404 393

Answer:

  C.  168°

Step-by-step explanation:

The exterior angle at any vertex of an n-gon will be ...

  360°/n

So a 30-gon will have exterior angles of ...

  360°/30 = 12°

The adjacent interior angle is supplementary to this, so is ...

  180° -12° = 168°

_____

<em>Using the reasonableness test</em>

You know that the interior angles of a square are 90°, and that regular polygons with more sides have larger interior angles. The most any regular polygon's interior angle can be is 180°. The only answer choice between 90° and 180° is the correct choice: 168°.

6 0
2 years ago
HELP PLEASE determine the number of real number solutions for the equation x^2+6x+9=0​
brilliants [131]

Answer:

1 Answer->3

Step-by-step explanation:

To factor this out find the factors of 9 which add up to 6.

3 and 3 work therefore factor it out to

(x+3)(x+3)=0

Using Zero product property x is equal to -3

And there is only one answer which is 3

6 0
1 year ago
Are these correct? ILL MARK YOU BRAINLIEST
Oxana [17]

Answer:

Yes

Step-by-step explanation:

1) Cos 300 = Cos (360 - 60) = Cos 60    {Cos 360 - theta = Cos theta}

                                              = 1/2

Sin 300 = Sin (360 - 60) = -Sin 60 = \frac{-\sqrt{3}}{2}

3) 3π/4 = 3*180/4 = 135

Cos 135 = Cos (90 + 45) = -Cos 45 = \frac{-\sqrt{2}}{2}

Sin 135 = Sin (90 + 45) = Sin 45 = \frac{\sqrt{2}}{2}

7 0
3 years ago
Solve 1/2x-2=9-5x by graphing ​
melamori03 [73]

Answer:

Step-by-step explanation:

8 0
2 years ago
1 in 3 babies born last year are expected to live to 100years old
kolbaska11 [484]
Divide 720,000 by 3. 
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3 years ago
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