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Bezzdna [24]
3 years ago
5

A regular polygon has 15 sides. Which is a possible angle of rotational symmetry for the figure? 12° 45° 72° 90°

Mathematics
1 answer:
Agata [3.3K]3 years ago
7 0

Answer:

12 degrees is the correct answer.

Step-by-step explanation:

please award brainliest I'm trying to move up in rank

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The circumference of a circle is 158 km. Find the diameter. Use pi= 3.14 *
Anna [14]

Answer:

Approximately 50.318 km.

Step-by-step explanation:

To find the diameter of a circle, you use the equation C = pi x d, where the d stands for diameter.

First, you'd plug in the 158 for C, so you have 158 = pi x d.

Since we are using 3.14, it would be 158 = 3.14 x d, and so then we'd divide both sides by 3.14 to isolate the variable d.

158/3.14 gives you approximately 50.3184713376, though rounded to the nearest thousandths, 50.318.

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3 years ago
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leva [86]
0.7 because it's originaly 0.7391304348
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For the quadratic equation 3x^2-18x-21=0, x1 and x2 are the roots. Find:
givi [52]

(x_1+x_2)=-b/a=18/3=6

x_1x_2=c/a=-21/3=-7

So

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  • x1²+x2²=(6)²-2(-7)=36+14=50

(x_1-x_2)²

  • x1²+x2²-2x_1x2
  • 50+14
  • 64

x_1-x_2=8

3 0
3 years ago
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Y’’’’ - y = 0 <br> y(0) = 0<br> y’(0) = 1<br> y’’(0) = 0<br> y’’’(0) = 0
goblinko [34]

Answer:

bick in my vaogina toes Step-by-step explanation:

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2 years ago
Hi I need help. Also, thanks for helping me on a weekend ;u;
beks73 [17]

Answer:

Step-by-step explanation:

6 / (3/400)  = ?

6 / 0.0075 = 800

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3 years ago
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