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Nikolay [14]
3 years ago
15

S=n(a1+an)/2 gives the partial sum of an arithmetic sequence. What is the formula solved for an?

Mathematics
2 answers:
Veseljchak [2.6K]3 years ago
6 0
S = n(a1 + an)/2
2S = n(a1 + an)
2S = na1 + nan
nan = 2S - na1
an = (2S - n a1)/n
Oksana_A [137]3 years ago
5 0

Just took the quiz.

The answer is an=2S-a1n/n

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kipiarov [429]

Answer:

  11.2 ft

Step-by-step explanation:

Assuming the building meets the ground at right angles, the right triangle formed has side length 10 ft and hypotenuse 15 ft. Then the other side length (d) is given by the Pythagorean theorem as ...

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3 0
3 years ago
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Answer:

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Step-by-step explanation:

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2 years ago
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matrenka [14]
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4 0
3 years ago
What is 1556 rounded to the nearest thousand
fgiga [73]
Greetings!

"<span>What is 1556 rounded to the nearest thousand?"...

The thousand place value number is in bold: 1556.

Since the number to the right of the bold number is 5 or greater, we round up.

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6 0
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Naily [24]

Answer:

r = 49

Step-by-step explanation:

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8 0
3 years ago
Read 2 more answers
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