7th Grade Math

Extra Practice EP13

Extra Practice

Multi-Part Lesson 4-4 (continued)

PART C PAGES 249–253

Solve each inequality. Graph the solution set on a number line.

1. 5 p ≥ 25 2. 4 x < 12 3. 15 ≤ 3 m


2. 3 d > 15 5. 8 < 7 r 6. 9 g < 27


3. 4 p ≥ 24 8. 5 p > 25 9. - 4 > _- 3 k


4. _- 5 z > 2 11. - 3 x ≤ 9 12. - 5 x > - 35


5. -a 6 < 1 14. -x 5 ≤ - 2 15. - 2 x < 16

Multi-Part Lesson 5-1: Proportions

PARTS A B PAGES 265–271

Find each unit rate. Round to the nearest hundredth if necessary.

1. $240 for 4 days 2. 250 people in 5 buses


2. 500 miles in 10 hours 4. $18 for 24 pounds


3. 32 people in 8 cars 6. $4.50 for 3 dozen


4. 245 tickets in 5 days 8. 12 classes in 4 semesters


5. 60 people in 4 rows 10. 48 ounces in 3 pounds


6. 20 people in 4 groups 12. 1.5 pounds for $3.00


7. 45 miles in 60 minutes 14. $5.50 for 10 disks


8. 360 miles on 12 gallons 16. $8.50 for 5 yards


9. 24 cups for $1.20 18. 160 words in 4 minutes


10. $60 for 5 books 20. $24 for 6 hours

PART C PAGES 272–275

1. POPCORN Fun Center rents popcorn machines for $20 per hour.
   In addition to the hourly charge, there is a rental fee of $32. Is the
   number of hours you rent the popcorn machine proportional to
   the total cost? Explain.


2. BAKING Mrs. Govin is making cakes for the school bake sale. She
   needs 2 cups of sugar for every cake she makes. Is the number
   of cakes Mrs. Govin makes proportional to the number of cups
   of sugar? Explain.


3. MUSIC At a local music store, CDs cost $11.99 including tax. Is the
   number of CDs purchased proportional to the cost of the CDs?
   Explain.


4. SAVINGS Jean has $280 in her savings account. Starting next week,
   she will deposit $30 in her account every week. Is the amount of
   money in her account proportional to the number of weeks?
   Explain.

EP2_EP36_ExtPract_M1_895130.indd EP13 1/6/10 11:46 AM