Evaluating Expressions

Front

What is the formula to evaluate an expression with a variable?

Back

To evaluate an expression with a variable, substitute the variable with its given value and perform the arithmetic operations.

Front

How do you evaluate an expression like b² + 3 when b = 9?

Back

Substitute 9 for b: 9² + 3 = 81 + 3 = 84.

Front

What is the result of evaluating x ÷ 4 if x = 80?

Back

Substituting 80 for x gives: 80 ÷ 4 = 20.

Front

How do you evaluate an expression with multiple variables, such as 3b + 4c?

Back

Substitute the values of b and c into the expression and then perform the arithmetic operations.

Front

Evaluate 3b + 4c if b = 9 and c = 3.

Back

Substituting gives: 3(9) + 4(3) = 27 + 12 = 39.

Front

What is the value of m² when m = 7?

Back

Substituting 7 for m gives: 7² = 49.

Front

What does it mean to evaluate an expression?

Back

Evaluating an expression means calculating its value by substituting variables with numbers and performing the necessary operations.

Front

What is the order of operations used when evaluating expressions?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

How do you handle exponents when evaluating expressions?

Back

Calculate the exponent first before performing other operations in the expression.

Front

What is the result of evaluating 3d if d = 5?

Back

Substituting 5 for d gives: 3(5) = 15.