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An arithmetic series contains 20 numbers. The first number is 102. The last number is 159. Which expression represents the sum of the series?

An arithmetic series contains 20 numbers. The first number is 102. The last number is 159. Which expression represents the sum of the series?
asked 172k views
1 vote
An arithmetic series contains 20 numbers. The first number is 102. The last number is 159. Which expression represents the sum of the series?

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User ZPPP
by
8.7k points

2 Answers

6 votes
given that 159-102=57

and 57/20=2.85

n=2.85

you would make the sum be 102+1n+2n.......20n= sum
answered
User Crewshin
by
7.9k points
4 votes

Answer:

It's B

Explanation:

20(102+159/2)

answered
User Evgnomon
by
8.1k points
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