Calculating Costs and Discounts

Mr. Wooley's video tutorial covers lesson 19, focusing on writing, evaluating, and finding equivalent expressions with rational numbers. The lesson includes calculating discounts, sales tax, and solving related problems. It also explores expressions for price changes and a practical example of calculating earnings from web page design.

What is the main focus of Lesson 19?

• Solving algebraic equations

• Writing essays

• Evaluating historical events

• Finding equivalent expressions with rational numbers

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

• $80

• $90

• $85

• $70

How do you express a 33% discount on an item priced at x dollars?

• x + 0.33

• x * 0.33

• x * 0.67

• x - 0.33

What is the result of applying an 8% sales tax to an $80 item?

• $82.40

• $84.00

• $88.00

• $86.40

How should you round a number to the nearest cent?

• Round to the nearest whole number

• Round to the nearest tenth

• Round to the nearest hundredth

• Round to the nearest thousandth

What expression represents the total cost for a family of 12 at a restaurant, considering drinks, meals, appetizers, and cake?

• 12d + 12m + 3a + 6c

• d + m + a + c

• 3(4d + 4m + a + 2c)

• 12(d + m + a + c)

If a drink costs $3 and a meal costs $28, what is the total cost for 12 drinks and 12 meals?

• $324

• $315

• $336

• $372

What is the final bill if a $315 restaurant check has a 10% discount and an 18% tip is added?

• $283.50

• $334.53

• $315.00

• $300.00

How much does Sally earn after expenses if she designs 5 web pages at $135.50 each and pays $650 in rent?

• $135.50

• $650.00

• $677.50

• $27.50

What is the expression for Sally's take-home pay after expenses?

• 135.50w + 650

• 135.50w - 650

• 650 - 135.50w

• w - 135.50