Question

Help would be awesome!

Answer 1

yes @bradenhart

Answer 2

it surely would be:)

Answer 3

the formula for an arithmetic sequence is as follows.
\(\large\color{black}{ A_n=a_1+d(n-1) }\)

where:
~ \(\large\color{black}{ A_n }\) is any nth term.
~ \(\large\color{black}{ a_1 }\) is the first term.
~ \(\large\color{black}{ d }\) is the difference (you add to obtain the next term)
~ \(\large\color{black}{ n }\) (in \(\large\color{black}{ a_n }\) ) is the number of the term.

Answer 4

i think answer is c

Answer 5

ok

Answer 6

am i right? @SolomonZelman

Answer 7

you need: \(\large\color{black}{ a_1 }\), \(\large\color{black}{ a_4 }\) and \(\large\color{black}{ a_{10} }\)

Answer 8

k

Answer 9

ok! So its 12,21,39

Answer 10

the answer was given away to be C, but we would check right?

Answer 11

\(\large\color{black}{ a_{1} }\) is 12, as given by the formula in your question.

Answer 12

\(\large\color{black}{ a_{4}=a_1+3(n-1)=12+3(4-1)=12+9=21 }\)

Answer 13

\(\large\color{black}{ a_{10}=a_1+3(n-1)=12+3(10-1)=12+27=39 }\)

Answer 14

thnx @SolomonZelman :]