Birthday Parties

1
Birthday Parties

• At Zachs birthday party, Zach is seated along
  with 7 guests at a rectangular table. Zach knows
  Gabe and Brooks from Cub Scouts, Christopher is
  his cousin, and Emily, Ian, Julie, and Lafern are
  from Zachs class. Zach is sitting at the head of
  the table, with the girls all sitting on one
  side, to Zachs right. His cousin is sitting at
  the opposite end of the table between Julie and
  Ian. Brooks is in the middle, opposite Emily.
• Draw a seating plan to show where everyone is
  sitting.

2

• Starting with Christopher at the head of the
  table and moving clockwise around the table, the
  seating plan is as follows Christopher, Julie,
  Emily, Lafern, Zach (opposite Christopher), Gabe,
  Brooks, and Ian.

3
Sales Tax and Discount

• Lesson 8-5

4
Sales tax and discount

• Sales tax - is an additional amount of money
  charged on items people buy. The total cost is
  the regular price plus the sales tax.
• Discount the amount by which the regular price
  of an item is reduced. The sale price is the
  regular price minus the discount.

5
Sales Tax

• The local, state, or federal government receives
  this money.
• For example if
• Louisiana State sales tax is 4
• Vermilion Parish sales tax is 4.5
• Total rate of tax is 8.5

6
Sales Tax Finding the total cost.

• A pair of shoes cost 90, and the sales tax is
  4.25. What is the total cost of the shoes?
• First find the amount of sales tax.
• 4.25 of 90
• 4.25 x 90
• 3.83

(This is the amount of tax being charged on the
sale. So to find the total cost we add the tax
to the original price.)
7
Sales Tax Finding the total cost.

• Add the sales tax to the original price.
• 90 3.83
• 93.83 is the total cost of the shoes.

8
Sales Tax

• A set of golf balls sells for 20, and the sales
  tax is 5.75. What is the total cost?
• 5.75 of 20
• 5.75 x 20
• 1.15
• 20 1.15
• 21.15

Add the sales tax to the original price.
9
Sales Tax

• Your Turn
• A video game system cost 130 and the sales tax
  is 6.5. What is the total cost of the video
  game system?

The total cost 138.45
10
Discount Finding the sale price.

• Alan wants to buy a bike that has a regular price
  of 169. This week the bike is on sale at a 35
  discount. What is the sale price of the bike?
• 35 of 169
• 35 x 169
• The discount is 59.15

11
Discount Finding the sale price.

• Subtract the discount from the original price.
• 169 - 59.15
• The sale price is 109.85

12
Discount

• Your Turn
• Whitney wants to buy a new coat that has a
  regular price of 185. This weekend, the coat is
  on sale at 33 off. What is the sale price of
  the coat?
• 123.95

13
Find the Percent of the Discount

• An electric guitar is on sale. What is the
  percent of the discount?
• First find the amount of the
• discount.
• 299.95 - 179.99
• 119.96
• 119.96 is what percent of 299.95

Original Price 299.95 Sale Price 179.99
This is the amount you save.
14
Find the Percent of the Discount

• 119.96 is what percent of 299.95

p
119.96

299.95
100
p 39.99 Round to the nearest whole number. p
40 The discount is 40
15
Find the percent of discount

• Your Turn
• A sports watch has an original price of 86. The
  sale price is 60.20. What is the percent of
  discount?
• 30

16
Practice

• Work with a partner to complete
• Pg. 356 12, 14, 16, 22 and 24.
• Your Homework
• Complete lesson 8-5 2-20 evens