Okay, i'm going to re explain this. (Sorry) Okaay..... The question is, how many blocks to you need to make a 20 step stair case. *BACKGROUND INFORMATION* To make a 3 step staircase you only need 6 blocks.

Question

Okay, i'm going to re explain this.  (Sorry)  Okaay.....   The question is, how many blocks to you need to make a 20 step stair case.  *BACKGROUND INFORMATION* To make a 3 step staircase you only need 6 blocks.
I already know how many blocks i need for a 20 step staircase.  What i need help with is creating an expression/rule for it.  Does that make sence?  If it doesn't...i'm sorry.

Thanks!! :)

Ms. Sue · Answer

How about a proportion? 3 / 6 = 20 / x

Reiny · Answer

look back here http://www.jiskha.com/display.cgi?id=1211844860