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lana [24]
4 years ago
13

Please answer this question​

Mathematics
1 answer:
alisha [4.7K]4 years ago
7 0

Answer:

36.

Step-by-step explanation:

sec^2 (π/9) = 1 / cos^2 (π/9) = 1.13247

sec^2 (2π/9) = 1 / cos^2 (2π/9) = 1.70409

sec^2 (4π/9) = 1 / cos^2 (4π/9) = 33.1634

Adding these gives us  36 to the nearest whole number

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Help
zalisa [80]
<h2>♪Answer : </h2>

Ingat rumus determinan fungsi kuadrat yaitu :

\longmapsto\boxed{\sf{D = b^2 - 4ac}}

Maka, Kita kembali jawab soalnya.

⏩Nomor (1) :

»8x² + 7x + 10 = 0

Didapatkan nilai² a, b, dan c yaitu :

  • a = 8 | b = 7 | c = 10

Maka, nilai determinannya adalah

  • D = b² - 4ac
  • D = 7² - 4(8)(10)
  • D = 49 - 4(80)
  • D = 49 - 320
  • D = -271✅

\:

⏩Nomor (2) ;

»2x² + 10x + 10 = 5

»2x² + 10x + 10 - 5 = 0

»2x² + 10x + 5 = 0

Didapatkan nilai² a, b, dan c yaitu :

  • a = 2 | b = 10 | c = 5

Maka, nilai determinannya adalah

  • D = b² - 4ac
  • D = 10² - 4(2)(5)
  • D = 100 - 4(10)
  • D = 100 - 40
  • D = 60✅
6 0
2 years ago
Read 2 more answers
29. For all values of X,
nirvana33 [79]
The answer is b I hope this helps
7 0
3 years ago
Please help me<br> .....................
Flauer [41]
Nansbdjs and uiaishdwueu828
6 0
3 years ago
What is the volume of the composite figure? Use 3.14 for π and round the answer to the nearest tenth of a cubic unit.
Bumek [7]
To find volume of a cylinder, you must find the area of the base and multiply it by the height of the object.

V=Bh where B=area of the base. Since the base is a circle, we must find area of the circle. A=pi(r^2)
A=3.14(6^2) Since it gave us the diameter, we take half for radius. Solve A=3.14(36)
A= 113.04 square cm

Now to find volume.
V=113.04•11
V=1243.44 cubic cm

Now find volume of the cone on top.

V=1/3Bh again with B= area of the base (pi)(r^2)
Since the two objects share a base, we can use the area of the cylinder as above.
V=1/3(113.04)9
We have to do a little simple math to determine the height of just the cone. Total height is 20-11 height of the cylinder. The difference is 9.
V=1/3(113.04)9 multiply
V=339.12 cubic cm

Now add the two volumes together to find total volume.
Total V=1243.44+339.12
V=1582.56 cubic cm
3 0
3 years ago
Read 2 more answers
Given: 5x + 3 &gt; 4x + 7.<br><br><br><br> Choose the graph of the solution set.
Natali5045456 [20]

Answer:

5x+3>4x+7

-4x      -4x

x+3>7

-3     -3

x>4

so the answer will be the second

Step-by-step explanation:

7 0
3 years ago
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