x = 2 is an algebraic equality (Because there is an 'equals'(=) sign)
x - 2 is an algebraic expression ( Because there is NO equals sign).
explain how to evaluate an algebraic expression for given variables. how would we evaluate the expression "3x-4y+9" when x=2and y=5?
You have to substitute a value for the letter variable in the expression. This is what we call evaluating the algebraic expression. An example would be 3x+1=7, when x=2.
1/2 (x+y)
an algebraic expression has no = sign. it could be like x+4, but an equation has to have an = sign. like x+4=5
x^2 plus 16y?