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erastovalidia [21]
3 years ago
7

Help me nowwwwwww!!!!!

Mathematics
1 answer:
marysya [2.9K]3 years ago
7 0

Answer:

43,-16,20,-8,an -12

Step-by-step explanation:bcz i think the patteren is they all equal evan numbers an all those numbers give u even numberswhen u do the math aginst -12.. hope it helps!

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What is angle B?<br><br> 1. 65°<br> 2. 55°<br> 3. 35°<br> 4. 90°
vfiekz [6]

Answer:

22°

Step-by-step explanation:

what you do is you take the angles 35° and 90°

You add them up, that would be 125°

the actual equation would be

35+90=180

 125=180

-125    

------------------

∠ B= 22°      

Hope this helps!

Reason this is wrong is i didn't notice the 10 cm

6 0
3 years ago
Calculate the length of ac
svlad2 [7]

Answer:

  12.1 cm

Step-by-step explanation:

Using the law of sines, we can find angle C. Then from the sum of angles, we can find angle B. The law of sines again will tell us the length AC.

  sin(C)/c = sin(A)/a

  C = arcsin((c/a)sin(A)) = arcsin(8.2/13.5·sin(81°)) ≈ 36.86°

Then angle B is ...

  B = 180° -A -C = 180° -81° -36.86° = 62.14°

and side b is ...

  b/sin(B) = a/sin(A)

  b = a·sin(B)/sin(A) = 13.5·sin(62.14°)/sin(81°) ≈ 12.0835

The length of AC is about 12.1 cm.

_____

<em>Comment on the solution</em>

The problem can also be solved using the law of cosines. The equation is ...

  13.5² = 8.2² +b² -2·8.2·b·cos(81°)

This is a quadratic in b. Its solution can be found using the quadratic formula or by completing the square.

  b = 8.2·cos(81°) +√(13.5² -8.2² +(8.2·cos(81°))²)

  b = 8.2·cos(81°) +√(13.5² -(8.2·sin(81°))²) . . . . . simplified a bit

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3 years ago
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ratelena [41]

Answer:

Of all 6 faces it would be 150

Step-by-step explanation:

If one side of the cube is 5cm long, then l × w = area of a face, so if it is a cube then all 4 sides are the same on a face so 5 × 5 = 25, so 25 × 6 faces = 150

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3 years ago
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o-na [289]

-0.23 I don’t know what to write but it says to at least write 20

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3 years ago
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Please help! :) I need the answer quick
scoray [572]

Answer:no clue

Step-by-step explanation:

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