GlossaryR


 * __Radius:__** The distance from the center to the edge of a circle.

When Rounding by front end, you look at the number furthest to the left (such as 5 in the number 548) and then see if the number right of the begging number is greater than or less than 5.
 * __Rounding__:** When you round to a certain place you will look at the number to the right, if it is greater than 5 you should round up, if under round down.

__**Rounding Mixed Numbers:**__ A mixed number is like this, 4 2/5, a number and a fraction. The point of rounding a mixed number is to get rid of the fraction to get an approximate amount. in this case because 2 is less than half of 5 you round down and the number is just 4. Conversely if the 2 were a 3 you would round up to 5 because 3 is more than half of 5.

1. Simplify both sides of the equation 2. Isolate the Variable 3.Divide both sides by the coefficient.
 * __Rules for Solving For X__:**


 * __Relatively Prime:__** When two numbers have no common factors except for one. Like 23 and 45. The numbers don't need to be prime numbers, but they share no common factors (except 1).

__**Reciprical:**__ A fraction flipped upside down.

__**Repeating Decimal:**__ A number that begins repeating(or becomes periodic) at some point after the decimal. Example 0.33333333... or 5.1773177317731773... Often is represented by a bar over the digits that are repeating.

__**Realatively Prime:**__ Two natural numbers, that have no common prime factor are said to be relatively prime.

__**Ratio**__ Comparing 2 somewhat similar things.

__**Rates**__ Measure things that aren't similar