The Purplemath Forums

by **Toxicity** on Wed Jan 07, 2009 12:33 am

The first one i need help with. 20m^9 n^2 /(divided by) 5m^4 n^6

The second one.
7x^6y^3....-3x^2y
---------- X ---------
5xy^2....... 6x^2y^2

Hope someone can help!

**Sponsor**

by **stapel_eliz** on Wed Jan 07, 2009 3:00 am

Toxicity wrote:The first one i need help with. 20m^9 n^2 /(divided by) 5m^4 n^6

I will guess that you mean the following:

. . . . . $\frac{20 m^9 n^2}{5 m^4 n^6}$

Toxicity wrote:The second one.
7x^6y^3....-3x^2y
---------- X ---------
5xy^2....... 6x^2y^2

I will guess that you mean the following:

. . . . . $\left( \frac{7 x^6 y^3}{5 x y^2} \right) \times \left( \frac{-3 x^2 y}{6 x^2 y^2} \right)$

What were the instructions for these exercises? What have you tried? How far have you gotten? Or do you need lessons first?

Before you reply, kindly please read the "formatting", so your working can be understood.

Thank you!

Eliz.

by **little_dragon** on Thu Jan 08, 2009 1:27 am

stapel_eliz wrote:. . . . . $\frac{20 m^9 n^2}{5 m^4 n^6}$

. . . . . $\left( \frac{7 x^6 y^3}{5 x y^2} \right) \times \left( \frac{-3 x^2 y}{6 x^2 y^2} \right)$

What were the instructions for these exercises?

I've done two things with this stuff: Either they give you numbers to plug in for the letters, or else you have to cancel stuff off as it is and you end up with variables. Are you supposed to do one of those for these?

If you have to do the second thing, then the first one is easy. 20/5 is 4, there are five extra m's on top, and four extra n's on the bottom. The second one is a little longer but not much harder.

The Purplemath Forums

need help with 20m^9 n^2 /(divided by) 5m^4 n^6

need help with 20m^9 n^2 /(divided by) 5m^4 n^6