2 years ago

In how many ways can 6 books be arranged on a shelf?

Mathematics

1 answer:

PolarNik [594]2 years ago

8 0

720 ways... if you divide six into all answers, 720 is the only rational number

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Frank wrote these ratios to describe the number of votes each candidate received compared to the total. Which one is wrong, and

strojnjashka [21]

Answer:The right answer is (B)

Step-by-step explanation:

Your welcome

3 0

3 years ago

The recursive rule for a sequence is an=an-1+7, where a1=15.What is the explict rule for this sequence

posledela

well, the recursive rule of aₙ = aₙ₊₁ + 7, where a₁ = 15, is simply saying that

we start of at 15, and the next term is obtained by simply adding 7, and so on.

well, that's the recursive rule.

so then let's use that common difference and first term for the explicit rule.

$\bf n^{th}\textit{ term of an arithmetic sequence} \\\\ a_n=a_1+(n-1)d\qquad \begin{cases} a_n=n^{th}\ term\\ n=\textit{term position}\\ a_1=\textit{first term}\\ d=\textit{common difference}\\ \cline{1-1} a_1=15\\ d=7 \end{cases} \\\\\\ a_n=15+(n-1)7\implies a_n=15+7n-7\implies a_n=7n+8$