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blsea [12.9K]
3 years ago
13

3x - 12 + 6x + 9?/ Help Please

Mathematics
2 answers:
Alexeev081 [22]3 years ago
5 0
9x-3 because you combine like terms
iragen [17]3 years ago
3 0
Combine like terms first
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A political campaign wants to estimate the number of adult residents who voted in the last city election. Answer the following.
Svetradugi [14.3K]

Using sampling concepts, it is found that:

a) The best method is: 25 adult residents are randomly selected from the city;

b) The estimate is that 11,536 adults voted in the election.

<h3>What is sampling?</h3>

It is a common statistics practice, when we want to study something from a population, we find a sample of this population, which is a group containing elements of a population. A sample has to be representative of the population, that is, it has to involve all segments of the population.

In this problem, the sample will be representative if all adults, no matter if senior or not, homeowners or not are represented, hence the best method is:

25 adult residents are randomly selected from the city;

The estimate of the number of adults that voted is:

14/25 x 20,600 = 11,536.

More can be learned about sampling concepts at brainly.com/question/25122507

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2 years ago
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wlad13 [49]

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Step-by-step explanation:

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Find the 7th term of a geometric sequence with t1=5 and r = -2.
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