Calculating Discounts and Expressions

The video tutorial covers Lesson 19, focusing on writing, evaluating, and finding equivalent expressions with rational numbers. It revisits concepts from Lesson 18, emphasizing the manipulation of expressions using techniques like the distributive property and combining like terms. The lesson transitions to practical applications involving money and discounts, explaining how to calculate discounts using percentages and original prices.

What is the main focus of lesson 19?

• Understanding geometric shapes

• Solving quadratic equations

• Writing, evaluating, and finding equivalent expressions with rational numbers

• Graphing linear equations

Which property is used to rewrite expressions like 2x + 2 * X?

• Identity Property

• Commutative Property

• Distributive Property

• Associative Property

What is the result of adding two x's and two more x's?

• 2x

• 3x

• 4x

• 5x

How do you express a discount of 20% in decimal form?

• 20.0

• 2.0

• 0.2

• 0.02

If an item costs $100 and has a 20% discount, what is the final price?

• $100

• $80

• $20

• $120

What is the equivalent of 20% when expressed as a fraction?

• 1/2

• 1/10

• 1/4

• 1/5

How do you calculate the amount to pay after a 20% discount on a $50 item?

• Multiply $50 by 0.2

• Add $10 to $50

• Subtract $10 from $50

• Multiply $50 by 0.8

What is the shortcut method to calculate the final price after a discount?

• Subtract the discount from the original price

• Multiply the original price by the percentage to pay

• Add the discount to the original price

• Divide the original price by the discount percentage

If the original price is $28 and the discount is 20%, what is the discount amount?

• $8.40

• $11.20

• $2.80

• $5.60

What percentage of the original price do you pay after a 20% discount?

• 20%

• 50%

• 80%

• 100%