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Exam2Practice

# Exam2Practice - P 224 where P is the price of the dragon...

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Math 12: Intermediate Algebra Instructor: Denise Gutierrez Name:__________________________ Mar 1, 2010 Practice Exam 2 (100 pts) Show your work for full credit 1. Multiply and simplify. (9 pts total) a) ( 29 ( 29 i i 6 4 3 1 - + - ans: i 18 14 + b) ) 3 9 )( 3 5 ( i i - - ans: i 42 36 - 2. Solve for the indicated variable. (9 pts total) a) r mv F 2 = for v ans: m mrF v ± = b) π A r = for A ans: 2 r A π = 3. Let 3 8 ) ( + - = x x f and 12 7 ) ( 2 - + = x x x g . Find each of the following and simplify. (8 pts total) a) ) 3 ( - p f ans: 27 8 + - p b) ) 2 ( - g ans: 22 -

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4. Determine the domain of each function. (11 pts total) a) 3 2 8 ) ( + + = x x x f b) t p f 5 7 ) ( - = ans: - - - , 2 3 2 3 , 1 ans: - 5 7 , 5. Use transformations to graph each function. Identify the domain and range. (18 pts total) a) 3 1 ) ( + - - = x x f Domain: ( 29 - , Range: ( ] 3 , - b) 2 ) 2 ( ) ( 2 - + = x x g Domain: ( 29 - , Range: [ 29 - , 2
6. A Los Angeles sushi restaurant found that the demand for the dragon roll was

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Unformatted text preview: P 224 , where P is the price of the dragon roll in dollars. The supply was given by 2 + P . Find the price at which demand for the dragon rolls equals the supply. (11 pts) Ans: \$14 7. Solve by using substitution and then factoring. (10 pts) 3 ) 2 ( 2 ) 2 ( 2 =-+ + + v v ans: { } 1 , 5--8. Solve by completing the square . (11 pts) 2 6 2 2 = + + f f ans: --+-2 5 3 , 2 5 3 9. Given 1 4 ) ( 2-+-= x x x f (13 pts) a) Find the vertex using the vertex formula. Ans: (2,3) b) Find the intercepts. Ans: x-int: ( 29 , 3 2 + and ( 29 , 3 2-y-int: ( 29 1 ,-c) Graph the function and label the vertex and intercepts....
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Exam2Practice - P 224 where P is the price of the dragon...

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