Given the functions f(n) = 25 and g(n) = 3(n − 1), combine them to create an arithmetic sequence, an, and solve for the 12th term.

Question

anonymous · Answer

an = 25 − 3(n − 1); a12 = −11
 an = 25 − 3(n − 1); a12 = −8
 an = 25 + 3(n − 1); a12 = 58
 an = 25 + 3(n − 1); a12 = 61

anonymous · Answer

wow
does "combine" mean "add"?

anonymous · Answer

yes :)

anonymous · Answer

tell your math teacher there is no such mathematical operation as "combine"

anonymous · Answer

Lol, will do!!

anonymous · Answer

although you can "combine like terms" for example

anonymous · Answer

if it means "add' then stick a plus sign between them
that is all

anonymous · Answer

Ok, so now have C and D left

anonymous · Answer

then replace $n$ by $12$ and see what you get

anonymous · Answer

58! So, is it C?