Question

Identify the 35th term of an arithmetic sequence where a1 = -7 and a18 = 95.
203
197
168
163

Answer 1

you would have to know the formula used to find the nth term in an arithmetic sequence..
\[a_n=a_1+(n-1)d\]

Answer 2

a(n)=the nth term
a(1)=the first term of the sequence
d=common difference

Answer 3

1st task is to find the common difference d, which can be done using the formula above and the 18th term

95 = -7 + ( 18 -1 )d

which is

95 = -7 + 17d

solve for d.

then use the formula above with n = 35

hope this helps.