M8A1 B.Simplify and evaluate algebraic expressions

To evaluate an algebraic expression means to:

• replace the variable(s) in the expression with numeric values that are assigned to them, and
• simplify the resulting numeric expression by using the order of operations 
• the end result is the numeric value of the expression when the variable(s) take on the assigned values.

• We put 2 in the expression wherever x appears, and we put -5 in the expression wherever y appears, and the result is:
  
  • 3(2² + (4)2) - 3(-5)