What is the complement of 30 degrees

Mathematics

2 answers:

cestrela7 [59]3 years ago

7 0

30° is the compliment

ivolga24 [154]3 years ago

5 0

The complement of 30 degrees is 60

Why?

A complement is a thing that completes something.

Now if your angle is 30 degrees, to complete the angle to be a right angle will be 60. Because 30 + 60 will equal to 90 degrees.

Hope this helped!

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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.

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