Evaluating Expressions and Writing Equations

The video tutorial demonstrates how to evaluate expressions by substituting different values for x in the expression -3x + 2. It covers four examples with x values of -4, 5, -1/3, and 1/2, showing step-by-step calculations and simplifications. The tutorial emphasizes the importance of correctly handling negative signs and fractions, and concludes with forming equations from the evaluated expressions.

What is the result when the expression -3x + 2 is evaluated for x = -4?

• 16

• 12

• 14

• -14

Which equation represents the expression -3x + 2 evaluated for x = -4?

• -3(-4) + 2 = 16

• -3(-4) + 2 = 14

• -3(-4) + 2 = 12

• -3(-4) + 2 = -14

What is the result when the expression -3x + 2 is evaluated for x = 5?

• 15

• -13

• 13

• -15

Which equation represents the expression -3x + 2 evaluated for x = 5?

• -3(5) + 2 = 13

• -3(5) + 2 = 15

• -3(5) + 2 = -13

• -3(5) + 2 = -15

What is the result when the expression -3x + 2 is evaluated for x = -1/3?

• -3

• 1

• 3

• -1

Which equation represents the expression -3x + 2 evaluated for x = -1/3?

• -3(-1/3) + 2 = 3

• -3(-1/3) + 2 = 1

• -3(-1/3) + 2 = -3

• -3(-1/3) + 2 = -1

What is the result when the expression -3x + 2 is evaluated for x = 1/2?

• 1

• -1

• 1/2

• -1/2

Which equation represents the expression -3x + 2 evaluated for x = 1/2?

• -3(1/2) + 2 = -1

• -3(1/2) + 2 = 1

• -3(1/2) + 2 = -1/2

• -3(1/2) + 2 = 1/2

What is the common denominator used when evaluating the expression -3x + 2 for x = 1/2?

• 2

• 4

• 3

• 1

What is the simplified form of the expression -3x + 2 when x = 1/2?

• -3/2 + 2

• -3/2 + 1

• 3/2 + 2

• 3/2 + 1