Key to Practice Final

Problem 1

A.  -x³ + 6x² - 5x + 13

B.  24x

C.  -x³ + x

Problem 2

x > -2

Problem 3

A function is a rule that assigns to each element of the domain to a unique element of the range. 

Problem 4

3x + 2 - 1/(x + 4)

Problem 5

A.  -16

B.  2x³ - 4x² + 2x - 4

Problem 6

-3 < x < 6

Problem 7

A.  y = -6x - 16

B.  x = 2

Problem 8

The company needs to display 71 long sleeve shirts

Problem 9

-1/27x

Problem 10

A.  x = 5/3 or x = -1

B.  No solution

Problem 11

A.  {x | x not -2}

B.  {x | x < 1}

Problem 12

x-int:  (-6,0)        y-int:  (0,2)        Shade above

Problem 13

A.  False:   there is no commutative property for subtraction.

B.  True:  Associative property of multiplication.

C.  True:  Distributive property

Problem 14

Sketch the line through (-2,5) and (-1,2)

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