Evaluating Expressions: A Comprehensive Guide

The video tutorial explains how to evaluate mathematical expressions by replacing variables with given values and solving the resulting expressions. It covers examples involving multiplication, addition, negative numbers, multiple variables, and exponents. The tutorial also includes a word problem that involves calculating the total cost of movie tickets, popcorn, and sodas, demonstrating different methods to solve it.

What does it mean to evaluate an expression?

• To rewrite the expression

• To find the variables

• To ignore the variables

• To replace variables with their values and solve

In Example 1, if N equals 4, what is the value of 2N?

• 24

• 8

• 2

• 4

In Example 2, if A equals 8, what is the result of 8 + 2?

• 12

• 10

• 16

• 6

In Example 3, if N equals -8, what is the result of 2N + 3?

• 5

• -5

• 13

• -13

What is the first step in solving 2N + 3 if N equals -8?

• Multiply 2 and -8

• Add 3 to -8

• Subtract 3 from -8

• Divide -8 by 2

In Example 4, if W equals 5 and V equals 3, what is the result of 8W - 2V?

• 30

• 40

• 34

• 6

What operation is implied when a number and a variable are touching?

• Division

• Multiplication

• Subtraction

• Addition

In Example 5, if Y equals 3, what is the value of 4Y^3 + 2?

• 81

• 27

• 108

• 110

What is the result of 3^3?

• 9

• 81

• 6

• 27

In the word problem, how much did you and your friends spend in total?

• $34.50

• $25.00

• $40.00

• $30.50