You replace variables by their assigned values, then do the calculations.
to find the value of an expression, you need to
Replace each variable in the expression by its value and then find the value of the expression.
You cannot find the answer to an expression!!! An expression needs to be EQUATED' to a value, for another value to be found. 2x^(2) + 5x + 12 is an EXPRESSION. Impossible to find an value for 'x'. However, 2x^(2) + 5x + 12 = 0 is an EQUATION and a result can be calculated.
Inequality
you have to deduce the variable and evaluate the expression.
to simplify!!* * * * *No. It is to EVALUATE.
sequence
Evaluate.
Absolute value can be defined as the distance from the expression to zero. Therefore, the absolute value of 13 is 13.
to solve for the variable
Multiply it.
umm I don't know