Key to Practice Midterm III

Problem 1

A.  2x² + 3x - 2

B.  16x² -24x - 9

C.  -4x³ + 3x² + 3x - 4

Problem 2

x² - 3x + 8 -25/(x + 3)

Problem 3

1.013 x 10⁵

Problem 4

x-int:  (5,0),        y-int:  (0,-1)

Problem 5

m = 9/5

Problem 6

A.  y = 3

B.  y = 2x - 7

Problem 7

x-int:  (5,0)        y-int:  (0,-2)        Shade downward

Problem 8

A.  Domain:  {2,3,5,7}    Range:  {1}        It is a function

B.  Domain:  {3,4}        Range:  {3,7,8}        It is not a function

Problem 9

A.  {x | x not 4}

B.  {x | x < 2}

Problem 10

A.  5

B.  -11

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