Assignment:
Explain how to evaluate an algebraic expression for given values of the variables. How would a person evaluate the expression "3x - 4y + 9" when x = 2 and y = 5?
(i) Explain the difference between a variable, a variable expression, and an equation. (ii) Explain the difference between a constant and a variable. (iii) Explain the difference between a constant and a coefficient. (iv) Explain the difference between a term and a factor. Use examples to support the explanations.
Provide complete and step by step solution for the question and show calculations and use formulas.