To simplify a problem, means to ________________ it down to its simplest name or answer.

 $2\ +4$  uses what math operation?

 $22\ -16$  uses what math operation?

 $10\times6$  uses what math operation?

 $10\div5$  uses what math operation?

The "E" in PEMDAS stands for what?

The "M" in PEMDAS stands for what?

The "D" in PEMDAS stands for what?

The "A" in PEMDAS stands for what?

Is this an Algebraic Expression or Equation:  $3^2+17\times3$  

Is this an Algebraic Expression or Equation:  $10\times5=50$  

Is this an Algebraic Expression or Equation:  $10\times15$  

Is this an Algebraic Expression or Equation:  $6-10\div5=4$  

 $4a+7$ : What is the variable? 

 $4a^2+7a+2$ :How many variable are in this problem?

 $2+x=?$  

Substitute  x = 5 and solve.