Homework Help: Math

Posted by Anonymous on Monday, January 28, 2008 at 8:26pm.

In Simplifying 7 to the 11th power and 7 to the 9th power, Alexis decides to use her calculator to find 7 to the 11th power and 7 to the 9th power indiviually before dividing. Show how Alexis could use the laws of exponents to arrive at the answer more easily.

Math - Damon, Monday, January 28, 2008 at 8:37pm
assume you are doing
7^11
------
7^9

Which is
7^9 * 7^2
----------
7^9

so 7^2
which is 49

to multiply, add exponents
to divide, subtract exponents
to raise to power, multiply exponents
Math - Anonymous, Monday, January 28, 2008 at 8:40pm
thanks so much
Math - Damon, Monday, January 28, 2008 at 8:46pm
You are welcome !

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