Chapter 9

$2x-6$

$36$

$2$

$3.5$

$20+5\text{n}$

$6$

$x=2$

$60$

$10$

$w-3$

$3h$

$6$

$25$

(a) $50.24\text{in}.$; (b) $200.96\text{sq}.\text{in}$.

$\text{0}\text{.196}$

$125$

$32$

$\frac{77}{2}$

$\frac{35\text{miles}}{1\text{gallon}}$

$12$

$\mathrm{\$200}$

$180

40

2

7

$950

$4,200

25

4

3

6

9, 15

27, 31

−8, −15

−29, 11

−4, 0

−2, −3

47, 48

−15, −16

31, 32, 33

−11, −12, −13

9 nickels, 16 dimes

17 nickels, 5 quarters

42 nickels, 21 dimes

51 dimes, 17 quarters

41 nickels, 18 quarters

22 nickels, 59 dimes

330 day passes, 367 tournament passes

112 adult tickets, 199 senior/child tickets

32 at 49 cents, 12 at 8 cents

26 at 49 cents, 10 at 21 cents

40°, 140°

25°, 65°

21°

56°

34°

45°

20°, 70°, 90°

30°, 60°, 90°

8

22.5

10

17

8

12

12 feet

8 feet

15 in.

9 yd

18 m, 11 m

11 ft , 19 ft

8 ft, 24 ft

5 cm, 4 cm

26 ft

29 m

30 ft, 70 ft

60 yd, 90 yd

13 sq. in.

49 sq. in.

8 ft

6 ft

14 in.

6 ft

13 in.

17 cm

14 ft

7 m

161 sq. yd

225 sq. cm

42 sq. cm

63 sq. m

40.25 sq. yd

240 sq. ft

17.27 ft

37.68 ft

30 cm

110 ft

28 sq. units

110 sq. units

36.5 sq. units

70 sq. units

103.2 sq. units

38.24 sq. units

65.94 cu. in.

235.5 cu. cm

678.24 cu. in.

128.2 cu. in.

330 mi

7 mi

11 hours

56 mph

ⓐ $h=20$ ⓑ $h=\frac{2A}{b}$

b = P − a − c

c = P − a − b

y = 11 − 7x

y = 8 − 11x

$y=\frac{9-4x}{7}$

$y=\frac{1-5x}{8}$

There are 30 children in the class.

Zachary has 125 CDs.

There are 6 boys in the club.

There are 17 glasses.

Lisa's original weight was 175 pounds.

18%

The original price was $120.

4

15

5

12

−5

18, 24

8, 12

−2, −3

4, 10

32, 46

38, 39

−11, −12

25, 26, 27

−11, −12, −13

The original price was $45.

Each sticker book cost $1.25.

The price of the refrigerator before tax was $1,080.

Answers will vary.

8 nickels, 22 dimes

15 dimes, 8 quarters

12 dimes and 27 nickels

63 dimes, 20 quarters

10 of the $1 bills, 7 of the $5 bills

10 of the $10 bills, 5 of the $5 bills

16 nickels, 12 dimes, 7 quarters

30 child tickets, 50 adult tickets

110 child tickets, 50 adult tickets

40 postcards, 100 stamps

30 at 49 cents, 10 at 21 cents

15 at $10 shares, 5 at $12 shares

9 girls, 3 adults

Answers will vary.

Answers will vary.

45°

62.5°

62°, 118°

62°, 28°

56°

44°

57°

67.5°

45°, 45°, 90°

30°, 60°, 90°

12

351 miles

15

25

8

12

10.2

8

5 feet

14.1 feet

2.9 feet

Answers will vary.

cubic

square

linear

24 inches

27 meters

23 m

7 in., 16 in.

17 m, 12 m

13.5 m, 12.8 m

25 ft, 50 ft

7 m, 11 m

26 in.

55 m

35 ft, 45 ft

76 in., 36 in.

30 sq. in.

25.315 sq. m

0.75 sq. ft

8 ft

23 in.

11 yd

28 cm

17 yd

6 m

15 ft

24 in.

27.5 in.

12 ft, 13 ft, 14 ft

3 ft, 6 ft, 8 ft

144 sq. ft

2805 sq. m

231 sq. cm

28.56 sq. m

13.5 sq. ft

1036 sq. in.

15 ft

$240

Answers will vary.

Answers will vary.

62.8 ft

37.68 in.

6.908 ft

52 in.

5.5 m

24 ft

6.5 mi

16 sq. units

30 sq. units

57.5 sq. units

12 sq. units

67.5 sq. units

89 sq. units

44.81 sq. units

41.12 sq. units

35.13 sq. units

95.625 sq. units

187,500 sq. ft

9400 sq. ft

Answers will vary.

37.68 cu. ft

324.47 cu. cm

261.67 cu. ft

64,108.33 cu. ft

Answers will vary.

612 mi

7 mi

6.5 hours

3.6 hours

60 mph

80 mph

a = 180 − b − c

y = 15 − 8x

y = −6 + 4x

$y=\frac{7-4x}{3}$

y = 4 + x

$L=\frac{P-2W}{2}$

$d=\frac{C}{\pi }$

$L=\frac{V}{WH}$

104° F

Answers will vary

Answers will vary.

There are 116 people at the concert.

His original weight was 180 pounds.

38

18, 9

16 dimes, 11 quarters

6 of $5 bills, 11 of $10 bills

35 adults, 82 children

3 of 26 -cent stamps, 8 of 41 -cent stamps

132°

33°, 57°

73°

30°, 60°, 90°

15

26

8

8.1

6 feet

cubic

square

25 cm

62 m

24.5 cm., 12.5 cm.

135 sq. in.

600 sq. in.

7 in., 7 in.

17 ft., 20 ft., 22 ft.

100 sq. ft.

675 sq. m

48 in.

30 sq. units

300 sq. units

199.25 sq. units

5.233 cu. m

4.599 cu. in.

1520 miles

1.6 hours

a = 90 − b

y = 17 − 4x

$W=\frac{P-2L}{2}$

−16

7 quarters, 12 dimes

38°

48.3

10

127.3 ft

2200 square centimeters

282.6 inches

1440

31,400 cubic inches

14.7 miles per hour