1105_LW5_5.1,5.2_F11

# 1105_LW5_5.1,5.2_F11 - MAC1105 Lecture Worksheet 5 Sections...

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MAC1105 Lecture Worksheet 5 Sections 5.1, 5.2 Fall, 2011 1. Let ( ) 1 f x x = - and 2 ( ) g x x = . Find a formula for each function below and state its domain. a) ( )( ) f g x - = Domain: b) ( ) f x g = Domain: c) ( )( ) g f x = r Domain: 2. Function f is given by the graph below. Function g is defined only for the x -values in the table below. Evaluate each expression. Some expressions may be “undefined”. Graph of f a) ( )( ) 5 f g + - = b) ( )( ) 0 f g = c) ( ) 3 f g = d) ( )( ) 4 g f = r e) ( ) ( ) 0 f g = x g(x) -5 1 -3 -5 0 6 1 5 3 0 4 3 5 4

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3. A gallon of paint covers a 200 square foot area. a) Write an equation that expresses our coverage area, A , as a function of n , the number of gallons of paint we have. It may be helpful to complete the table first to see the pattern. _____ = ____________ b) Solve your equation from part a) for n to produce an equation that expresses the number of gallons of paint as a function of coverage area
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1105_LW5_5.1,5.2_F11 - MAC1105 Lecture Worksheet 5 Sections...

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