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Oduvanchick [21]
2 years ago
9

A swimming coach needs to choose a team for a relay race. The coach must select 4 of 6 available swimmers

Mathematics
1 answer:
Trava [24]2 years ago
8 0

The number of unique ways is given by the number of possible

combination having distinct members.

The number of unique ways there are to arrange 4 of the 6 swimmers are <u>15 ways</u>.

Reasons:

The given parameters are;

The number of swimmers available = 6 swimmers

The number of swimmers the coach must select = 4 swimmers

Required:

The number of unique ways to arrange 4 of the 6 swimmers.

Solution:

The number of possible combination of swimmers is given as follows;

_4C_6 = \dfrac{6!}{4! \times (6 - 4)!}  = 15

Therefore, the coach can select 4 of the 6 available swimmers in <u>15 unique ways</u>

Learn more here:

brainly.com/question/23589217

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-u≥4−u≥4 true. Then write an equalivalent inequality, in terms of uu. (Numbers written in order from least to greatest going acr
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Answer:

(a)\ u \le -4

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Step-by-step explanation:

Given

-u \ge 4

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We know that: x' = -1 + i     and x" = -1 - i

If Δ > 0 we have 2 rational solutions x' and x"

If Δ = 0 we have1 rational solution x' = x"

If Δ < 0 we have 2 complex solutions x' and x", that are conjugate

In our example we have Δ = - 16 then <0 so we have 2 complex solutions

That are x'= [-b+√Δ]/2.a      and x" = [-b-√Δ]/2.a

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