In an inequality (Ex: 8>4) and graphing it, there are two symbols we use, an arrow that originates at an open dot, and an arrow that originates at a closed dot. If it's a greater than or equal to sign, you use a closed dot, if it's a greater than sign, it needs an open dot. The open dot means that it can't be equal to the number (Ex: 8>4, you don't count the four). It's like the number falls through the hole. A closed dot
 
Personally, I don't understand the concept very well. For me, dividing is easier than multiplying. For example, take the equation 2x=16, wouldn't it be easier, and faster, to just divide here? If you didn't divide, you'd be multiplying fractions, using one as a denominator, and come out with 16/2. You'd end up simplifying it to 8/1, still easier to divide.

 
I'm honestly not very fond of math, but have one way help me remember how to solve fractions easier that I learned in Fitfth Grade. The little mover man who has his baseball cap! It's the funniest thing in the world, but it helps me more than anything else. Personallity, the distributive property probably helps me the most, but I've never really used it in math, I don't use the others either. I can be so stubborn that I forget anything like that that's useful for me. I just do the problem as is most of the time.
 
Everybody at least knows Buzz Lightyear's catchphrase, "To infinaty and beyond." and we all heard the concept about there being no end to numbers. Well, that's why there is an infinate amount of decimals between 1 and 0.