Question

If the 6th term of an arithmetic sequence is 48, and the sum of the first 6 terms is 300, what is the first term and the constant difference?

Answer 1

just use your facts about such sequences:

a+5d = 48
6/2(a + a+5d) = 300

Now just solve for a and d.

Answer 2

Always check back to see if your previous post of the same question has been answered before reposting it.
http://www.jiskha.com/display.cgi?id=1420301789
This will prevent unnecessary duplication.