Six books are to be placed in a 3-tier triangular shelf. How many ways can this be done if the top teir can hold one book, the s
1 answer:
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Hello there!
Answer: ⇒ C. -30
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Step-by-step explanation:
First you had to remove parenthesis.
Then you multiply by the number.
Apply absolute value.
Again apply absolute value.
Simplify it's should be the correct answer.
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-Charlie
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