• What are the differences among expressions, equations, and functions? Provide examples of each.

Question

unklerhaukus · Answer

expressions have operations but do not make an equivalence statement 

equations make an equivalence statement 

functions have an equivalence between a single dependent value for a specific co-ordination of  its independent variables(s)

anonymous · Answer

An expression doesn't necessarily have an operation, it could just be a number.

Equations have equals signs, expressions do not.

unklerhaukus · Answer

would you really classify 
$$2$$as an expression?

anonymous · Answer

Of course. What else would it be?

unklerhaukus · Answer

a term; a numeral ,

anonymous · Answer

So if I simplify the expression 4-2, the result is no longer an expression?

unklerhaukus · Answer

it simplifies to a single term

anonymous · Answer

References: http://mathforum.org/library/drmath/view/62493.html "An expression is a mathematical "phrase" that stands for a single number; . . . An expression can also be a single number or variable, since those have a numerical value." Why is a single term not an expression. "2" expresses the numerical constant, 2.

unklerhaukus · Answer

i suppose i consider that a phase requires multiple terms