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Mariulka [41]
2 years ago
13

Plz help will give crown

Mathematics
2 answers:
Ray Of Light [21]2 years ago
6 0

Answer: I would have to say 1/21

Step-by-step explanation: Because since there is only 2 aces i believe that drawing one is quite out of the ordinary.

OverLord2011 [107]2 years ago
6 0
1/21

Explanation:

I think it’s 1/21 but I’m not 100% sure
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A city has 3 new houses for every 9 old houses. If there are 15 new houses in the city, how many old houses are there?
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Answer:

45 old houses

Step-by-step explanation:

new houses : old houses

3 : 9

15 : ?

(3 = 1st ratio and 9 = 2nd ratio)

To find the missing ratio, divide the first ratio from the new ratio:

15 / 3 = 5

Take the product and multiply that by the second ratio to find the missing ratio:

9 x 5 = 45

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2 years ago
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. Find the area of the regular dodecagon inscribed in a circle if one vertex is at (3, 0).
devlian [24]

Answer:

Area of the regular dodecagon inscribed in a circle will be 27 square units.

Step-by-step explanation:

A regular dodecagon is the structure has twelve sides and 12 isosceles triangles inscribed in a circle as shown in the figure attached.

Since angle formed at the center by a polygon = \frac{360}{n}

Therefore, angle at the center of a dodecagon = \frac{360}{12} = 30°

Since one of it's vertex is (3, 0) therefore, one side of the triangle formed or radius of the circle = 3 units

Now area of a small triangle = \frac{1}{2}.(a).(b).sin\theta

where a and b are the sides of the triangle and θ is the angle between them.

Now area of the small triangle = \frac{1}{2}.(3).(3).sin30

= \frac{9}{4}

Area of dodecagon = 12×area of the small triangle

= 12×\frac{9}{4}

= 27 unit²

Therefore, area of the regular octagon is 27 square unit.

4 0
2 years ago
Isosceles triangle has a line of symmetry
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What are you asking?
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How do I do this? <br><br> -2(6-r)=4
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Step-by-step explanation:

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