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Paladinen [302]

1 year ago

10

Which of the following is an example of a set of like terms? A. 19y, 19, y. B. 18x, -x, 21x. C. 15, 20, 25y. D. -2x, -2y, -2xy.

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1 answer:

djyliett [7]1 year ago

7 0

Answer:

B. 18x, -x, 21x

Step-by-step explanation:

They are like terms becuase you can add them.

Please give brainliest (:

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Answer:

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2 years ago

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Lesechka [4]

Using the combination formula, it is found that:

1. A. 7 combinations are possible.

B. 21 combinations are possible.

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2. There are 245 ways to group them.

<h3>What is the combination formula?</h3>

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by:

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

Exercise 1, item a:

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7 combinations are possible.

Item b:

Two letters from a set of 7, hence:

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21 combinations are possible.

Item c:

7 letters from a set of 7, hence:

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1 combination is possible.

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There are 245 ways to group them.

More can be learned about the combination formula at brainly.com/question/25821700

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