Two steps.1) Replace any variable by its value.
2) Do the indicated calculations.
It means to find the numerical value of the expression.
Equivalent expressions.
None of "these" expressions represent anything!
An absolute-value function
There are many expressions that have this value. The simplest one is the number zero itself.
It means to find the numerical value of the expression.
algebraic expressions
Equivalent expressions.
None of "these" expressions represent anything!
Yes, numerical expressions can have the same value. For example, the expressions 2+3 and 5 both have the value of 5. Similarly, the expressions 2x3 and 6 both have the value of 6. In general, any two numerical expressions that evaluate to the same number will have the same value.
Yes, some expressions can be identical in value.
They are callled: Identical equations or Identities See: http://www.tutorvista.com/search/value-algebraic-expressions
equivalent
They are identities.
Not necessarily.
unequal
In C++ all false relational expressions have a mathematical value of 0.