Test 12 - Final Exam Flashcards Preview

8th Math - Pre-Algebra > Test 12 - Final Exam > Flashcards

Flashcards in Test 12 - Final Exam Deck (50):
1

  542

x786

--------

 

426,012

2

  9.4

- 6.783

-----------

 

2.617

3

15% of $8,000

 

$1,200

4

2438783 divided by 893

 

2731

5

   3 1/3

-  2 2/5

------------

 

  3 5/15 =   2 20/15

- 2 6/15 =  - 2 6/15

--------------------------------

               14/15

6

4 1/2 divided by 3/8 =

 

9/2 x 8/3 =

3/1 x 4/1 = 12

7

1 1/4% of $550

 

550 x .0125 = 6.875

round to $6.88

8

square root of 1,296

 

36

9

83

 

512

10

4x + 7 = 23

 

4x + 7 - 7 = 23 - 7

4x = 16

4x/4 = 16/4

x = 4

11

    -12

- (-16)

--------

 

-12

+16

------

4

12

3x2y(2xy3)

 

6x3y4

13

+18 divided by -9

-2

14

16ab3 divided by 4a2b2

 

16ab3      just cancel out

------------   =                           

4a2b2   just cancel out

4b

-------

a

15

6 g   91 mg

x         8

------------------

 

48 g   728 mg

16

2.5 lb. = ________ kg

 

.45 x 2.5 = 1.125

17

12 is what % of 20?

 

12       60   

---- =  -----  = 60%

20     100

18

7      x

--  =  --

12    15

 

Cross multiply to get 12x = 105.   Divide both sides by 12 to get:

12x   105                    cancel the 12's on the left to get    x =

---- = ------                    divide 105 by 12 to get  8.75

12       12                       x = 8.75

19

10 mi. = ______ km

 

1.61 x 10 = 16.1 km

20

24a2b2c - 36ab3c2

----------------------------

             3ab2

 

divide each side of the top equation by the bottom because the top equation cannot be combined.  Remember you just divide the numbers & cancel out the letters.  If there is a2 on top & a on bottom, 1 a on top cancels with the a on bottom to leave a1 on top that you write as a. 

8ac - 12bc2

21

Multiply (2x + 5) (3x - 2)

 

                             2x + 5

                             3x -  2

                             ______

                           - 4x  -  10

                 6x2  +  15x

                ________________

                 6x2   +  11x  -  10

22

write the formula used to find the length of the hypotenuse in a right triangle.

 

c2 = a2 + b2

23

write 13,000,000,000 using scientific notation.

 

1.3 x 1010

24

find the mean of 240; 317; 188; 439

 

296

25

find the area of a rectangle that is 12 ft. x 15 ft.

 

A = lw

A = 12 x 15

A = 180 sq. ft.

26

find the circumference of a circle with a radius of 4 ft.

 

C = 2pir

C = 2 x 3.14 x 4

C = 25.12 ft.

27

find the simple interest on $2,000 for 3 years at 12 1/2 % interest.

 

I = principle x time (years) x interest

I = 2000 x 3 x .125

I = $750

28

find the volume of a cube with 5 ft. edges

 

V = e3

V = 53

V = 125 cu. ft.

29

find the surface area of a cube with 4.1 in. edges

 

SA = 6e2

SA = 6 x 4.12

SA = 6 x 16.81

SA = 100.86 sq. in.

30

find the volume of a cylinder with a raduis of 10 in. and a height of 8 in.

 

V = pir2h

V = 3.14 x 102 x 8

V = 2512 cu. in.

31

write .00009 using scientific notation

 

9 x 10-5

32

find the median of 17; 21; 16; 14; 18; 12; 19

 

12, 14, 16, 17, 18, 19, 21

17

33

evaluate 6x + 3xy    if    x = -2 and y = 6

6(-2) + 3(-2)(6)

-12 + (-36)

-48

34

simplify  4x + 3y + 6x - 4y + 2y

 

4x + 6x + 3y - 4y + 2y

10x +3y - 2y

10x + y

35

find the social security tax on $350 at a rate of 7.65%

350 x .0765

$26.78

36

write the number of degrees in a circle

 

360o

37

write the name of the lines in the same plane that never intersect

 

parallel

38

find the number that is 2 more than 3 times 5

 

2 + 3 x 5

17

39

find the area of a triangle that has a base of 6 ft. and a height of 5 ft.

 

A = 1/2 b h

A = 1/2 x 6 x 5

A = 1/2 x 30

A = 15 sq. ft.

40

find the length of the hypotenuse if the legs are 6 ft. and 8 ft.

 

c2 = a2 + b2

c2 = 62 + 82

c2 = 36 + 64

c2 = 100

c = 10 ft.

41

T or F:

the antecedent is the second term in a ratio.

 

F

42

T or F:

A rectangular prism has 6 faces.

 

T

43

T or F:

Tax is protection against material loss.

 

F

44

T or F:

the length of the radius is one half the length of the diameter.

 

T

45

T or F:

A compass is used to measure angles

 

F

46

T or F:

An equilateral triangle has three congruent sides

 

T

47

T or F:

A circle graph compares the parts to the whole

 

T

48

T or F:

A rational number is a nonterminating, nonrepeating number

 

F

49

T or F:

A cylinder is a solid shape

 

T

50

T or F:

Installment buying is buying on time

 

T