Question

WILL GIVE FAN AND MEDAL
Find an equation for the nth term of the arithmetic sequence.

-15, -6, 3, 12, ...

Answer 1

We know that the equation is increasing by 9 isn't?

Answer 2

Yes

Answer 3

@jewea just gave you a hint that they all go by nine "12-(9)=3;
3-(9)=-6

u see??

Answer 4

I understand that part

Answer 5

okayii so then what u don't understand

Answer 6

just add till you get on the ninth term i'll help u

Answer 7

an = -15 + 9(n + 1)
an = -15 x 9(n - 1)
an = -15 + 9(n + 2)
an = -15 + 9(n - 1)

these are my answer choices and idk how they got this from the question

Answer 8

if it's fine with you

Answer 9

Im very confused

Answer 10

I think the first one cuz it goes 3,12,21,30...
the second one doesnt' really match the question it goes 0,-135,-270..
#3_12,21....
#4 is RIGHT :)

Answer 11

Thankyou :)