A number is divisible by 9 if the sum of its digits is greater than or equal to 9. 621 (6+2+1=9), for instance, is divisible by 9. Simply move the decimal point one place to the left to find the 10% ...

I make short, to-the-point online math tutorials. I struggled with math growing up and have been able to use those experiences to help students improve in math through practical applications and tips.

In this video tutorial I will show you how to simplify a rational expression and then write the excluded values from the domain. I make short, to-the-point online math tutorials. I struggled with math ...