Question

Select a tool or technique such as manipulatives or mental math to find A(7) when A(n) = A(n-1)+5 and A(1)=-20. A(7)=?

HELP!

Answer 1

@dan815 @pooja195

Answer 2

Oh no! The question changed because I took too long! Ughhh.

it is now the same except that A(1)= -25

Answer 3

A(n)-A(n-1)=5
common difference d=5
A(1)=-25
an=a1+(n-1)d
A(7)=-25+(7-1)*5=?

Answer 4

5?

Answer 5

Yes it is 5! Thank you so much!!!

Answer 6

correct.