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notsponge [240]
2 years ago
15

How do I write this expression in fewer terms? 9m + k - (3m-2k)

Mathematics
2 answers:
qaws [65]2 years ago
6 0
The answer to this question is 3(2m+k) because this has been simplified. You just need to collect terms together! 3(2m+k)
ahrayia [7]2 years ago
5 0
Let's start by applying the negative to (3m-2k)

since a negative x positive is a negative, and a negative x negative is a positive, we get

9m + k - 3m + 2k

let's simplify

9m - 3m + 2k + k

ANSWER
6m + 3k
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Statistics show that about 42% of Americans voted in the previous national election. If three Americans are randomly selected, w
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Answer:

19.51% probability that none of them voted in the last election

Step-by-step explanation:

For each American, there are only two possible outcomes. Either they voted in the previous national election, or they did not. The probability of an American voting in the previous election is independent of other Americans. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

42% of Americans voted in the previous national election.

This means that p = 0.42

Three Americans are randomly selected

This means that n = 3

What is the probability that none of them voted in the last election

This is P(X = 0).

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{3,0}.(0.42)^{0}.(0.58)^{3} = 0.1951

19.51% probability that none of them voted in the last election

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2 years ago
What is the square root of 3.24
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