Writing Expressions for Cost with Discounts

The video tutorial teaches how to calculate the cost of an item after a discount using a double number line. It explains the relationship between percentages and decimals, and how to use them to determine discounts. The tutorial provides examples with numeric and algebraic expressions, demonstrating how to calculate the final price after applying a discount. It also covers advanced calculations and expressions for different discount scenarios.

What does a discount represent in terms of the item's price?

• A percentage of the item's price subtracted from the total

• A percentage of the item's price added to the total

• The full price of the item

• An increase in the item's price

If Jace's television costs $300 and he receives a 15% discount, what is the discounted price?

• $285

• $270

• $300

• $255

How can Jace express the total cost of the television after a 15% discount using decimals?

• 1.15 times $300

• 0.85 times $300

• 0.15 times $300

• 1.00 times $300

What is the algebraic expression for the cost of an item after a 15% discount if the original price is unknown?

• 1.15x

• 0.15x

• 1x + 0.15x

• 1x - 0.15x

If the discount on an item is 20%, how would you express the final price using an algebraic expression?

• 1x + 0.20x

• 0.20x

• 1x - 0.20x

• 1.20x

What is the equivalent decimal for a 20% discount?

• 1.20

• 0.80

• 0.20

• 2.00

How do you calculate the final price after a discount using the original price and the discount percentage?

• Add the discount percentage to the original price

• Multiply the original price by (1 minus the discount percentage)

• Subtract the discount percentage from the original price

• Multiply the original price by the discount percentage