2.1 applications sales tax and discounts ink.notebook. September 27, Page 73. Page 74 Page Apps Sales Tax. and Discount.

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1 2.1 applications sales ta and discounts ink.notebook Page 73 Page 74 Page Apps Sales Ta and Discount Lesson Objectives 2.1 Applications: Sales Ta and Discounts Press the tabs to view details. Standards Standards A.CED.1 A.CED.1 A.CED.3 A.REI.1 A.REI.3 Lesson Notes I will create a proportion to find sales ta and discount and solve it I will create a proportion from a word problem and solve it I will identify the constraints on a word problem I will solve a proportion by using cross multiplication I will solve a proportion Press the tabs to view details. 1

2 Lesson Objectives Standards Lesson Notes A.CED.1 Create equations and inequalities in one variable and use them to solve problems. A.CED.3 Represent constraints by equations or inequalities, and by systems of equations and/or inequalities, and interpret solutions as viable or nonviable options in a modeling contet. N.Q.3 Choose a level of accuracy appropriate to limitations on measurement when reporting quantities. A.REI.1 Eplain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method. A.REI.3 Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters. Percent of Change: difference = original Press the tabs to view details. 1) original: 50 2) original: 45 new: 80 new: 20 Increase or Decrease Difference: Increase or Decrease Difference: = = of change = of change = 2

3 piece sales ta = add = total discount = subtract Find the total price of each item. Sales ta is added onto the cost. 3) Shirt: $ ) CD player: $ Sales ta: 4 Sales ta: 5.5 = = Sales Ta: Sales Ta: Find the discounted price of each item. Show your proportions Discounts are subtracted from the cost. 5) Compact disc: $16 6) Two concert tickets: $28 Discount: 15 Student discount: 28 = = 3

4 2.1 applications sales ta and discounts ink.notebook Find the final price of each item. 7) television: $ ) DVD player: $ discount: 25 discount: 20 ta: 6 ta: Subtotal: Subtotal: Ta: Ta: On Your Whiteboards 4

5 a) printer: $ discount: 30 ta: 5.5 Subtotal: Ta: On the Worksheet Find each percent of change. Round to the nearest tenth of a percent. Homework 1. original: original: 35 new: 24 new: 32 Difference: Difference: of change = of change = 5

6 Find each percent of change. Round to the nearest tenth of a percent. 3. original: 27 new: The original selling price of a new sports video was $ Due to the demand the price was increased to $ What was the percent of increase over the original price? Difference: of change = 5. dress: $2.50 Sales ta: limo: $85.00 Sales ta: 7 7. messenger bag: $28.00 Sales ta: 7.25 Sales Ta: Sales Ta: Sales Ta: 6

7 8. guitar: $95 9. skateboard: $99.99 Discount: 15 coupon: 20 off 10. computer: $ discount: Solve each story problem. Remember to label your answer. Subtotal: Subtotal: 13. Wal Mart has a PS3 on sale for $240. The regular price is $300. Find the discount rate. Ta: Ta: 7

8 14. What would be the total bill, with ta, on a $25 purse with a 7.5 sales ta rate? 16. A $5 Value Meal at McDonald s ends up costing $5.35 with ta. What was the ta rate? 15. Target has an I Pod touch on sale for 12.5 off. The regular price is $300. Find the sale price. 17. Sears is selling plasma TV s for $1200. They usually sell for $1500. What is the discount rate? For each story problem, write an equation, solve it by showing all work, and then write your answer as a complete sentence. 18. After Jean gave away of her fish, she had 12 fish left. How many fish did she have before she gave some away? Write an equation only. Do not solve. 19. This year, a ring selling for $53 costs 7 dollars less than twice what it cost last year. What did the ring cost last year? Write an equation only. Do not solve. 8

9 Answers: 20. Four times Mary s age is the same as 8 less than 5 times her age. Find her age by writing an equation. Solve by showing work and write your answer as a complete sentence. 9