454 algebra De mystif ieD

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

23. 2
    12

3

(^2216)
x
xx−− x

• 
  

  −

  
  

  A.^2512
  34
  2
  2
  xx
  xx
  −+
  ()+−()
  B.^2712
  34
  2
  2
  xx
  xx
  −+
  ()+−()
  C.
  2119
  344
  xx^2
  xxx
  ++
  ()+−()()+
  D. 2911
  344
  xx^2
  xxx
  ++
  ()+−()()+

  
  

24. 
    

    The division problem 32 .. (^81) )0 574 can be rewritten as
    A. 3280 10 574) , B. 328 10 574) , C. 328 105 740) , D. (^3280) )1 057 400,,

    
    


25. 
    

    Completely factor 25 xx^32 +− 82 x− 0.
    A. ()xx^2 −+^42 ()^5 B. ()xx−+^22 ()()^25 x− C. ()xx−+^22 ()()^25 x+
    D. 25 xx^32 +− 82 x− 0 cannot be factored.

    
    


26. 
    

    The difference of two positive numbers is 3 and their product is 340.
    What is the smaller number?
    A. 16 B. 17 C. 18 D. 19

    
    


27. 
    

    20 xx^32 −+^15 xx^5 xx=
    A. −−^54 xx()xx^2 −−^3 B. −−^54 xx()xx^2 ++^3
    C. −−^54 xx()xx^23 + D. −−^54 xx()xx^2 +−^3

    
    


28. 
    

    A retired teacher wants to invest an inheritance worth $160,000 in two
    separate investments: a municipal bond, paying 3% annual interest, and
    a corporate bond, paying 412 % annual interest. If she wants an annual
    income from these investments to total $5775, how much should she
    invest in the corporate CD?
    A. $65,000 B. $70,000 C. $75,000 D. $80,000

    
    


29. 
    

    1
    5 x^2

    
    

=

A.^1

5

x^2 B. −^1

5

x^2 C. 1

5

2

x









−

D. 1

5

x−^2

30. −− 12 xx^242 += 0
    A. −− 43 ()xx^2 − 5 B. −+ 43 ()xx^2 + 5 C. −+ 43 ()xx^2 − 5
    D. −− 43 ()xx^2 + 5