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3 years ago

SOMEONE HELP ME PLEASE

Mathematics

2 answers:

aalyn [17]3 years ago

4 0

Answer:

9/25

Step-by-step explanation:

3 novels , 1 bio , 1 poetry = 5 books

P( novel) = novels / books

= 3/5

Book is returned

3 novels , 1 bio , 1 poetry = 5 books

P( novel) = novels / books

= 3/5

P(novel, return, novel) = 3/5 * 3/5 = 9/25

dangina [55]3 years ago

4 0

Answer:

3/5

Step-by-step explanation:

There are 5 books, and there are 3 novel books.

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Given:

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Step-by-step explanation:

Property 1: Every integer is a rational number. It is Theorem 4.3.1.

Property 2: The sum of any two rational numbers is rational. It is Theorem 4.3.2.

Property 3: The product of any two rational numbers is rational. It is Exercise 15 in Section 4.3.

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$3r^2+(-2r)+4$ is rational by property 2.

So, $3r^2-2r+4$ is rational.

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