Evaluating Expressions and Operations

The video tutorial covers evaluating expressions using substitution, demonstrating with examples. It explains how to replace variables with given values, perform operations in the correct order, and handle exponents. The tutorial emphasizes the importance of following the order of operations and provides step-by-step solutions to various expression problems.

What is the first step in evaluating an expression when given the values of variables?

• Divide by the variable

• Multiply all numbers

• Use substitution

• Perform addition

In the expression 3x - 2y + x, if x = -2 and y = 4, what is the result after substitution?

• -16

• -14

• -12

• -10

When you have a number next to two variables, what operation does it imply?

• Addition

• Division

• Subtraction

• Multiplication

What is the result of the expression -2ab + 3 when a = -1 and b = -6?

• -9

• -12

• 9

• 12

What is the first operation to perform according to the order of operations?

• Multiplication

• Addition

• Subtraction

• Parentheses

In the expression (4 + 5)^2, what is the result of the operation inside the parentheses?

• 8

• 9

• 10

• 11

What is the result of 9^2?

• 99

• 81

• 27

• 18

In the expression 5c^3, if c = -2, what should be calculated first?

• 5 plus -2

• 5 minus -2

• -2 to the third power

• 5 times -2

What is the result of (-2)^3?

• -8

• 8

• -6

• 6

What is the final result of 5 times (-2)^3?

• 20

• -20

• 40

• -40