To replace a variable with an algebraic expression with a known value is to

To replace a variable with an algebraic expression with a known value is to

• A. Substitute
• B. Exponent
• C. Base
• D. Constant

Answer: (A)

Replacing a variable with a known value in an algebraic expression is called substitution. When you know the value of a variable, you substitute that value for the variable to evaluate or simplify the expression. For example, if x = 3 and you substitute into x^2 + 5x, you get 3^2 + 5×3 = 9 + 15 = 24. This is the action you’re performing: you’re plugging in the known value to replace the variable. The other terms refer to different ideas: an exponent is the power to which a number is raised, a base is the number that is raised to a power or used in certain expressions, and a constant is a fixed number that doesn’t change.

Replacing a variable with a known value in an algebraic expression is called substitution. When you know the value of a variable, you substitute that value for the variable to evaluate or simplify the expression. For example, if x = 3 and you substitute into x^2 + 5x, you get 3^2 + 5×3 = 9 + 15 = 24. This is the action you’re performing: you’re plugging in the known value to replace the variable.

The other terms refer to different ideas: an exponent is the power to which a number is raised, a base is the number that is raised to a power or used in certain expressions, and a constant is a fixed number that doesn’t change.