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qwelly [4]
3 years ago
6

Uma caixa contém 40 bolinhas de jogo de tênis, sendo 10 verde, 14 azuis e 16 vermelhas. Retirando uma bola ao acaso da caixa, qu

al a probabilidade desta bola ser vermelha? Assinale a alternativa correta, que representa a probabilidade desta situação.
qual dessas quatro e a resposta .
14 / 40
15 / 40
16 / 40
17 / 40
Mathematics
1 answer:
crimeas [40]3 years ago
3 0

Answer:

p = 15/40

Step-by-step explanation:

Since the total number of marbles is 40, that is our size of the sample. there are 16 red ones on that sample, so the probability of extracting a red marble from the box is given by the ratio of successes divided the total number of marbles:

p = 15/40

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If there is 20 students then 30 students what is the percentage?
12345 [234]

Answer:

what

Step-by-step explanation:

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4 0
3 years ago
alex is running in a clockwise direction around a circular track with radius 60 yards. he runs for 20 minutes at a speed of 4 ya
Ganezh [65]

Answer:

  100.9 yards

Step-by-step explanation:

One circuit of the track is a distance of ...

  C = 2πr = 2π(60 yd) = 120π yd.

At Alex's running rate, the distance covered in 20 minutes is ...

  (4 yd/s)(20 min)(60 s/min) = 4800 yd

The number of circuits will be ...

  (4800 yd)/(120π yd/circuit) = 40/π circuits ≈ 12.7324 circuits

The last of Alex's laps is more than half-completed, so the shortest distance to his starting point is 13 -12.7324 = 0.2676 circuits,

That distance is (0.2676 circuits)×(120π yd/circuit) ≈ 100.88 yd

The shortest distance along the track to Alex's starting point is about 100.9 yards.

_____

<em>Additional comment</em>

The exact distance is 120(13π-40) yards. The distance will vary according to your approximation for pi. If you use 3.14, this is about 98.4 yards.

3 0
3 years ago
you can transform 4x + 12 = 9x - 3 again into a simpler form by subtracting 4x form both sides to get 12 = 5x - 3, if you subsit
nikdorinn [45]

Answer: Yes you will still get a true statement because 3 is the solution to the equation.

Step-by-step explanation:

Well substitute 3 for x into the equation and solve for to see if they equal each other.

12 = 5(3) - 3    

12 = 15 - 3

12 = 12  

So if you substitute 3 you get the solution .

Now solve for x in the real equation to see if you get 3.

4x + 12 = 9x -3  

-4x           -4x

 12 = 5x -3  

+3           +3

15 = 5x  

x = 3  

7 0
3 years ago
How do I do this? I am having a hard time doing this ​
Alenkasestr [34]

Answer:

you put ur account nuber where it says savings account number, where it says account in words you will put what you wish to withdraw, and put your signature.

Step-by-step explanation:

you will have to write the number in words and in numbers wheres it says dollars and cents x- i hope this helps

7 0
3 years ago
Read 2 more answers
HELP HAVING ALOT OF TROUBLE!!
Ivenika [448]

Hello!

To solve this problem we first need to find the value of each given item.

12^4 is equal to 12·12·12·12, or 20,736

12·12·12·12·12 is equal to 12^5, or 248,832


With this information being provided, it can be said that 12^4 < 12x12x12x12x12

Hope this helps.

5 0
3 years ago
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