7th Grade Math

EP18 Extra Practice

Extra Practice

Multi-Part Multi-Part Lesson 6-3 (continued)

PART D PAGES 355–358

Find the sale price to the nearest cent.

1. $18.99 CD; 15% discount 2. $199 ring; 10% discount


2. $19 purse; 25% discount 4. $899 computer; 20% discount


3. $599 TV; 12% discount 6. $210 watch; 20% discount


4. $40 game; 30% off; 5% tax 8. $6 notebook; 50% off; 7% tax


5. $80 jacket; 15% off; 5.5% tax 10. $10 binder; 60% off; 6% tax

PARTS E F PAGES 359–363

Find the simple interest earned to the nearest cent for each principal,

interest rate, and time.

1. $2,000, 8%, 5 years 2. $500, 10%, 8 months 3. $750, 5%, 1 year


2. $175.50, 6 ^1
   2
   %, 18 months 5. $236.20, 9%, 16 months 6. $89, 7 ^1
   2
   %, 6 months


3. $800, 5.75%, 3 years 8. $225, 1 ^1
   2
   %, 2 years 9. $12,000, 4 ^1
   2
   %, 40 months

Find the simple interest paid to the nearest cent for each loan, interest rate,

and time.

10. $750, 18%, 2 years 11. $1,500, 19%, 16 months 12. $300, 9%, 1 year


11. $4,750, 19.5%, 30 months 14. $2,345, 17%, 9 months 15. $689, 12%, 2 years


12. $390, 18.75%, 15 months 17. $1,250, 22%, 8 months 18. $3,240, 18%, 14 months

Multi-Part Multi-Part Lesson 7-1: Rates and Functions

PARTS A B PAGES 377–384

Copy and complete each function table. Then identify the domain

and range.

1. x 2 x y

0

1

2

3

2. x 3 x + 1 y

1

2

3

4

3. x x - 2 y

3

4

5

6

4. x x + 0.1 y

2

3

4

5

EP2_EP36_ExtPract_M1_895130.indd EP18 1/6/10 11:46 AM