Homework Help: 8th grade

Posted by Nick on Sunday, November 22, 2009 at 12:18pm.

Hi my class is doing a unit on patterns with algebraic expressions. And i need to find a difficult expression

Figure# Term value
1 8
2 27
3 64
4 125

what is the algebraic expression and how did u do it? thank you.

Math-Nick

8th grade math - PsyDAG, Sunday, November 22, 2009 at 12:29pm
It looks like a progression from 2-5, with each number being cubed.

2^3 = 2 * 2 * 2 = 8

If you let n stand for the number in your first column, then these would be the algebraic expressions.

(n + 1)^3 = 8
(n + 1)^3 = 27
And so on.

I hope this helps.

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