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navik [9.2K]
2 years ago
7

There are 9 balls in a hat .The balls are numbered 1-9 you need to choose 3 of the balls . How many possible combinations are th

ere
Mathematics
1 answer:
Virty [35]2 years ago
3 0

Answer:

84

Step-by-step explanation:

Combinations

nCr

n (objects) = 9

r (sample) = 3

9C3

n! / r! (n – r)!

9! / 3! (9 – 3)!=

9! / (3! * 6!)=

9*8*7*6!/ (3! * 6!)=

6! cancels out

9*8*7/3*2*1=

3*4*7=

12*7=

84

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Answer:

a. Decay

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Explanation:

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If b > 1; then the equation is modelling growth. If b < 0, then the equation is modelling decay.

Now in our case, we have

y=4(\frac{1}{2})^x

Here we see that

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Therefore, the answers are

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b. 0.5

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1 year ago
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RoseWind [281]
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kari74 [83]

Answer:

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Oksanka [162]

Answer:

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7 0
3 years ago
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