Algebra Demystified 2nd Ed

Final exaM 459

DeMYSTiFieD / algebra DeMYSTiFieD / gibilisco / 000-0 / appendix

63. 
    

    Mary Ann bought a pair of boots that were marked down 25%. If she
    paid $128.40 after a sales tax was 7% added, what was the original price
    of the boots?
    A. $150.00 B. $151.50 C. $153.60 D. $160.00

    
    


64. 
    

    (^) xx^8 − 3 + 35 − =
    A. 3 −^3 x B. −+
    −
    39
    32
    x
    ()x
    C. (^) x^3 − 3 D. (^1) −^1 x

    
    


65. 
    

    Which interval is the solution for^12 <^31 x 4 − <^5?

    
    

A.^5

3

7,









B. (,−∞ ∪∞^17 )(,) C. (,^17 ) D. (,^12 )

66. 354 xy^106 =

A. 32 xy^323 x B. 32 xy^23 x C. 92 xy^323 x D. 92 xy^23 x

67. What is 60 increased by 20%?

A. 68 B. 69 C. 70 D. 72

68. The interval (,−∞ 6 ) is represented by

6 6

6

A.

6

C.

B.

D.

69. xx
    xx

2

2

12 32

20

++

−−

=

A. x

x

+

+

8

5

B. 38

5

x

x

+

+

C.

x

x

+

−

8

5 D.^

xx

xx

2

2

12 32

20

++

−−

cannot be simplified.