Evaluating Expressions and Using a Graphing Calculator

The video tutorial demonstrates how to evaluate mathematical expressions by substituting given values for variables and applying the order of operations. It covers four examples: evaluating 5x - 8 for x = -9, 2 - 4x for x = -7, 1/2 * B * H with B = 4 and H = 9.5, and 5x^2 + 6x - 3 for x = 2. Each example is verified using a graphing calculator.

What is the result of evaluating the expression 5x - 8 when x = -9?

• -45

• -53

• -50

• -63

Which operation should be performed first when evaluating 5x - 8 for x = -9?

• Division

• Addition

• Multiplication

• Subtraction

What is the result of evaluating the expression 2 - 4x when x = -7?

• -28

• -30

• 28

• 30

How can the expression 2 - 4x be simplified when x = -7?

• By dividing by 28

• By adding 28

• By subtracting 28

• By multiplying by 28

What is the improper fraction equivalent of 9.5?

• 9/2

• 18/2

• 20/2

• 19/2

What is the result of evaluating 1/2 * B * H for B = 4 and H = 9.5?

• 21

• 20

• 18

• 19

What is the first step in evaluating 5x^2 + 6x - 3 for x = 2?

• Subtract 3

• Square 2

• Add 6 to 2

• Multiply 5 by 2

What is the result of evaluating 5x^2 + 6x - 3 when x = 2?

• 32

• 30

• 29

• 25

Which operation is performed last when evaluating 5x^2 + 6x - 3 for x = 2?

• Multiplication

• Addition

• Subtraction

• Exponentiation

What is the value of 2^2 in the expression 5x^2 + 6x - 3 for x = 2?

• 4

• 16

• 8

• 2