Algebra Vocab

2. An expression is a combination of individual terms separated by plus or minus signs. Numerical expressions combine numbers and operation symbols; algebraic (variable) expressions include variables.
4. A symbol used to represent one or more numbers. In this course, letters of the English alphabet are used as variables.
7. The endpoint or endpoints of a ray or segment on a number line where an inequality is true, marked with a solid dot. For strict inequalities (that is, inequalities involving < or >), the point is not part of the solution, and is marked with an open dot. Boundary points may be found by solving the equality associated with the given inequality.
8. Mat An Equation Mat puts two Expression Mats side-by-side to find the value(s) which make the expressions equal. Legal moves are used to find the value(s) that makes the expressions equal.
9. An inequality consists of two expressions on either side of an inequality symbol.

1. Two values are in a proportional relationship if a proportion may be set up that relates the values.
2. A mathematical sentence in which two expressions appear on either side of an “equals” sign between them indicating that they have an equal value.
3. A ratio compares two quantities by division. A ratio may be written using a colon, but is more often written as a fraction. For example, the comparison may be made of the ratio of female students in a particular school to the total number of students in the school.
5. To find the numerical value of. To evaluate an expression, substitute the value(s) given for the variable(s) and perform the operations according to the Order of Operations.
6. To simplify an expression is to write a less complicated expression with the same value. A simplified expression has no parentheses and no like terms.