Unit 3
Glossary
Accelerated 7
Equivalent expressions are always equal to each other. If the expressions have variables, they are equal whenever the same value is used for the variable in each expression.
For example, \(3x+4x\) is equivalent to \(5x+2x\).
- When \(x\) is 3, both expressions equal 21.
- When \(x\) is 10, both expressions equal 70.
- When \(x\) is any other number, both expressions still have equal value.
An inequality is a statement that compares two values or expressions using symbols such as “\(>\)” or “\(<\)”.
- The symbol “\(>\)” means “is greater than.”
- The symbol “\(<\)” means “is less than.”
For example, the inequality \(\text-3 > \text-7\) tells us that -3 is greater than -7.