Expressions for Cost and Chairs

The video tutorial covers lesson 21 on writing and evaluating expressions, focusing on using multiplication and addition. It includes examples of calculating seating around tables and determining pizza costs with delivery fees. The tutorial also explores adjusted pricing scenarios for pizzas and delivery, emphasizing the use of expressions to solve practical problems.

What mathematical operations are primarily used in writing and evaluating expressions in this lesson?

• Subtraction and division

• Multiplication and addition

• Addition and subtraction

• Division and multiplication

How many chairs can be placed around two square tables pushed together?

• 6 chairs

• 10 chairs

• 4 chairs

• 8 chairs

What is the expression for calculating the number of chairs around T square tables?

• 2T - 2

• T * 2

• 2T + 2

• T + 2

If there are 60 tables, how many chairs can be placed around them using the expression 2T + 2?

• 122 chairs

• 126 chairs

• 120 chairs

• 124 chairs

What is the cost of delivering one pizza with a $2 delivery fee?

• $8

• $10

• $4

• $6

What expression represents the total cost of P pizzas with a $2 delivery fee?

• P + 4

• 4P - 2

• 2P + 4

• 4P + 2

If the principal orders 6 pizzas, what is the total cost using the expression 4P + 2?

• $24

• $26

• $28

• $30

What is the new cost of one pizza if the price is raised to $5 and the delivery fee to $3?

• $9

• $8

• $7

• $6

How does the expression for the total cost change if the pizza price is $5 and the delivery fee is $3?

• 4P + 5

• 4P + 3

• 5P + 3

• 5P + 2

What is the total cost for 10 pizzas with the new prices of $5 per pizza and a $3 delivery fee?

• $55

• $58

• $53

• $50