EVALUATION OF RATIONAL EXPRESSIONS


Evaluate the expression if a = -5, b = 2 ½ , c = -1/2 and d = 15.


19. a + (-b) + c 


   = -5 + (-5/2)  + (-1/2)


   = -8


20. b + (-d) + (-a)


   = 5/2 + (-15) + 5


   = -7 ½  or  – 15/2


21. –a + b + (-c)


   = (5) + (2 ½) + (1/2)


   = 8


22. –b + d+ a


   = -5/2 + 15 + (-5)


   = 7 ½ or 15/2




Credit:ivythesis.typepad.com


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