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Katyanochek1 [597]
3 years ago
9

The formula to find a certain number in an arithmetic sequence is an=a1+d(n−1) .

Mathematics
1 answer:
REY [17]3 years ago
7 0

Answer:

(an -a1)/d +1 = n

Step-by-step explanation:

Undo what is done to n, in reverse order. When evaluating this expression, you ...

  • subtract 1 from n
  • multiply the difference by d
  • add a1

When you undo these, you get ...

... an -a1 = d(n-1) . . . . . . subtract a1

... (an -a1)/d = n - 1 . . . . divide by d

... (an -a1)/d +1 = n . . . . add 1

_____

<em>Comment on answer list</em>

Please note the use of parentheses in the answer here. These identify that the difference (an -a1) is what is divided by d. None of the offered answers has these parentheses, nor are they typeset in a way that would indicate the intent to divide (an -a1) by d. As given, none of the offered answers is correct.

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Answer:

b. 12π

Step-by-step explanation:

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2 years ago
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The number of Euros received against 600 dollars = 450
Then
For 1 dollar, the number of euros = (450/600) euros
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So the unit rate that describes the exchange rate is 0.75 euros per dollar. So the correct option among all the options given in the question is option "A". I hope the procedure for getting to the correct result is clear enough for you to understand. In future you can use this procedure for solving similar problems.


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The Wii[g] (/wiː/ WEE) is a home video game console developed and marketed by Nintendo. It was first released on November 19, 2006 in North America and in December 2006 for most other regions. It is Nintendo's fifth major home game console, following the GameCube, and is a seventh generation home console alongside Microsoft's Xbox 360 and Sony's PlayStation 3.

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