Answer:
13
Step-by-step explanation:
where n is the number of terms, a1 is the first term and an is the last term. The sum of the first n terms of an arithmetic sequence is called an arithmetic series . Example 1: Find the sum of the first 20 terms of the arithmetic series if a1=5 and a20=62 .An arithmetic sequence is a sequence where the difference between any two consecutive terms is a constant. ... As with any recursive formula, the initial term of the sequence must be given. An explicit formula for an arithmetic sequence with common difference d is given by an=a1+d(n−1) a n = a 1 + d ( n − 1 ) .
Answer:
I think is D
Step-by-step explanation:
Any number that makes an equation true is a "solution of an equation" it id a solution....(i hope this helps) *smiles*
$20.70
Eighteen dollars
Fifteen percent of eighteen is 2.7
(.15 X 18)+18
Answer:
25y2 i think
Step-by-step explanation:
i hope it helps
