20+x = 12+2x is the answer and x=8
Answer:
E which is 5 * sqrt(2)
Step-by-step explanation:
yeah ya..... right?
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An arithmetic sequence (a_n) is as follows:

where

is the first term and d is the constant difference,
thus, we see that the n'th term of an arithmetic sequence is

in our particular case d=5, the third term is 8, so we have:

and the general term is

,
Answer: first term is -2, n'th term is -2+5(n-1)
Answer:
18
Step-by-step explanation:
18
2 * 9 = 18
9 + 9 = 18