Evaluating Expressions with Variables

The video tutorial explains how to evaluate variable expressions using two examples. In the first example, the expression 5x + 14 is evaluated by substituting x with 11 and applying the order of operations to find the result. The second example involves the expression 9x - 2y, where x is substituted with 8 and y with 3, followed by the application of the order of operations to determine the final value.

What is the first step in evaluating the expression 5x + 14 when x = 11?

• Add 5 and 14

• Divide 14 by 5

• Multiply 5 by 11

• Subtract 11 from 14

After substituting x = 11 in the expression 5x + 14, what is the result of the multiplication?

• 44

• 55

• 77

• 66

What is the final result of the expression 5x + 14 when x = 11?

• 69

• 65

• 67

• 66

In the expression 9x - 2y, what does 9x represent when x = 8?

• 9 plus x

• 9 times x

• 9 minus x

• 9 divided by x

What is the value of 9x when x = 8?

• 64

• 88

• 72

• 80

What is the result of 2y when y = 3?

• 6

• 5

• 7

• 8

What is the final result of the expression 9x - 2y when x = 8 and y = 3?

• 68

• 70

• 66

• 64