Test 4 , Units 3.1 - 4.15 Flashcards Preview

8th Math - Pre-Algebra > Test 4 , Units 3.1 - 4.15 > Flashcards

Flashcards in Test 4 , Units 3.1 - 4.15 Deck (45):
1

___g = 1 kg

 

1000

2

___ cm = 1 m

 

100

3

___ mm = 1 dm

 

100

4

___ mi. = 5 km

1 mi = .62 km

.62 x 5 = 3.1

5

___ lb. = 500 kg

 

1 lb = 2.2 kg

2.2 x 500 = 1100

6

___ m = 19 yd.

 

 

1 m = .91 yd

.91 x 19 = 17.29 = 17.3

7

freezing point of water - F

 

 

32 F

8

freezing point of water - Celsius

 

0 C

9

boiling point of water - F

 

212 F

10

boiling point of water - Celsius

 

100 C

11

___  C = 55 F

 

C = 5/9(F - 32)

C = 5/9(55 - 32)

C = 5/9(23)

C = 115/9

C = 12.7

C = 13

12

___ F = 25C

 

F = 9/5C + 32

F = 9/5(25) + 32

F = 45 + 32

F = 77

13

___C = 99F

 

C = 5/9(F - 32)

C = 5/9(99 - 32)

C = 5/9(67)

C = 335/9

C = 37.2 = 37

14

what is the numerical coefficient of 3axy

3

15

write the number of terms in a trinomial

 

3

16

write six less than x as an algebraic expression

 

x - 6

17

solve 32 (2 + 5) - 6

 

9 (7) - 6

63 - 6

57

18

identify as like or unlike terms:  4x2y  ;  4xy2

 

unlike

19

write the exponent in 53

 

3

20

solve 50

 

1

21

solve y1

 

y

22

if a = 5, b = 4, c = 2

abc2

 

5 * 4 * 22

20 * 4

80

23

if a = 5, b = 4, c = 2

b(a + c)

 

 

4(5 + 2)

4 (7)

28

24

if a = 5, b = 4, c = 2

ac2 - b/2

 

5(22) - 4/2

5(4) - 2

20 - 2

18

25

3m + 6m + 2m

11m

26

12x2 + 3xy - x2 + y2

 

11x2 + 3xy + y2

27

9n + 4n + n

 

14n

28

(2x)(x2)

 

2x3

29

(4x2)(2x)(3xy)

 

24x4y

30

(m2)(m4)(m)

 

m7

31

x4 / x3

 

x

32

12a2bc  /  4abc

 

3a

33

20mn2 / 5m2n2

 

4/m

34

x + 2 = 9

x + 2 - 2 = 9 - 2

x = 7

35

3x = 18

 

x = 6

36

1/2x = 7

 

2 * 1/2x = 7 * 2

x = 14

37

4x + 3 = 2x + 9

 

 

4x - 2x + 3 = 2x - 2x + 9

2x + 3 - 3 = 9 - 3

2x/2 = 6/2

x = 3

38

.5x = 10

 

5x = 100

x = 20

39

2/3x = 6

 

3/2 * 2/3x = 6 * 3/2

x = 18/2

x = 9

40

2 * 2 * a * a * b * b

 

4a2b2

41

5xxxyyyy

 

5x3y4

42

8 * 8 * 8 * m * m * n

 

512m2n

43

Cara traveled at the average rate of 52 mph on her trip.  How many kilometers per hour was she traveling?  Find the answer to the nearest whole kilometer.

 

1 mi. = 1.61 km

1.61 x 52 = 83.72 = 84

44

Cara filled up her car with 15 gallons of gas.  How many liters did she buy? (convert 15 gal. to qt. first.)

 

15 gal x 4 = 60 qt.

1 qt. = .95 liters

.95 x 60 = 57

45

The temperature when she arrived was 68 F.  What was the temp on the Celsius scale?

 

C = 5/9 (F - 32)

C = 5/9 (68 - 32)

C = 5/9 ( 36)

C = 5 ( 4)

C = 20