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storchak [24]
3 years ago
5

In how many ways can 4 singers be selected from 8 who came to an audition?

Mathematics
1 answer:
elena-s [515]3 years ago
7 0

The first selection can be any one of the 8. 
               For each one ...
The second selection can be any one of the remaining 7. 
               For each one ...
The third selection can be any one of the remaining 6. 
               For each one ...
The fourth selection can be any one of the remaining 5.

Total number of ways to select four = (8 x 7 x 6 x 5) = 1,680 ways

BUT ... There are not 1,680 different groups of 4 .

Each group of 4 can be selected in (4 x 3 x 2) = 24 different ways.

So, although there are 1,680 different ways to select 4 singers,
there are only
                           (1,680 / 24) = 70 different groups of 4
                                                     that you can end up with.

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Answer:

Domain: (-∞, ∞) or All Real Numbers

Range: (0, ∞)

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As x ⇒ ∞, f(x) ⇒ ∞

Step-by-step explanation:

The domain is talking about the x values, so where is x defined on this graph? That would be from -∞ to ∞, since the graph goes infinitely in both directions.

The range is from 0 to ∞. This where all values of y are defined.

An asymptote is where the graph cannot cross a certain point/invisible line. A y = 0, this is the case because it is infinitely approaching zero, without actually crossing. At first, I thought that x = 2 would also be an asymptote, but it is not, since it is at more of an angle, and if you graphed it further, you could see that it passes through 2.

The last two questions are somewhat easy. It is basically combining the domain and range. However, I like to label the graph the picture attached to help even more.

As x ⇒ -∞, f(x) ⇒ 0

As x ⇒ ∞, f(x) ⇒ ∞

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