Friday

October 24, 2014

October 24, 2014

Posted by **kate** on Sunday, April 5, 2009 at 6:16pm.

(4^3 x 5^-2)(5^4 x 4^-5)/ 4^-3 x 5^3

and

(2^x+2) - (2^x+5) = -7

please help!:)

- exponents -
**drwls**, Sunday, April 5, 2009 at 11:30pmJust use the rules for adding and subtracting exponents of the same number, when multiplying or dividing.

(4^3 x 5^-2)(5^4 x 4^-5)/ (4^-3 x 5^3)

= 4^-2 x 5^2/(4^-3 x 5^3)

= 4^1 x 5^-1 = 4/5

Do the second problem the same way

**Answer this Question**

**Related Questions**

College Algebra - I need some help with a few problems. They are multiple choice...

(Math)Simplifying using the laws of exponents - I need help with a few problems...

Science gr 8 - Hi I really need help !! What are the 3 problems fluid technology...

Math - 3) Explain how the laws of exponents work with rational exponents and ...

math - I'm having trouble simplifying two problems with exponents. Please help. ...

Exponents - I need to know if i answered this right. Use the laws of exponents ...

Math - I need to correct my test and I figured out why I missed a few of them ...

Math Help please!! - how do you do these problems?? 5-26 2-2/9 8-2/3 4/3+6 But I...

Developmental Psychology - There are a number of ways that emotional or ...

Math - how do you do these problems?? 5-26 2-2/9 8-2/3 4/3+6 But I can do these ...