The first sign of syphilis is a small sore, called a chancre (SHANG-kur). The sore appears at the spot where the bacteria entered your body. While most people infected with syphilis develop only one chancre, some people develop several of them. The chancre usually develops about three weeks after exposure.
The colon is the symbol :. It is used in a number of different ways in mathematics. 1. To denote ratio or odds, as in 2:1 (voiced two to one). 2. To mean such that in constructions such as (voiced the set of numbers such that ). 3. To give a name to a map, e.g., (which is equivalent to the function notation ).
Algebra uses symbols to represent quantities without fixed values, known as variables. Credit: Volt Collection | Shutterstock. Algebra is a branch of mathematics dealing with symbols and the rules for manipulating those symbols. In elementary algebra, those symbols (today written as Latin and Greek letters) represent quantities without fixed values, known as variables.