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Chapter Test

# Chapter Test - • CORRECT x – 4 x – 2 10 Identify the...

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Chapter Test Quadratic Equations and Functions Results of the quiz. 1. Solve 9 x 2 + 6 x + 1 = 64. CORRECT: –3, 2. Identify the vertex and y -intercept of the graph of f ( x ) = –4( x + 3) 2 + 7. CORRECT: (–3, 7), y -intercept –29 3. Lane Manufacturing estimates that its weekly profit, P , in hundreds of dollars, can be approximated by the formula P = –4 x 2 + 14 x + 3 where x is the number of units produced per week, in thousands. a. How many units should the company produce per week to earn the maximum profit? b. Find the maximum weekly profit. INCORRECT: a. 3 units; b. \$3900 CORRECT: a. 3000 units; b. \$3900 4. Factor t 2 – 10 t + 25. CORRECT: ( t – 5) 2 5. The graph of y = –2 x 2 + 15 x + c contains (3, 89). Find the value of c . CORRECT: 62 6. Graph y = ( x – 3) 2 + 1. CORRECT: 7. Without graphing, tell how many x -intercepts y = 2 x 2 + 4 x + 2 has. CORRECT: 1 intercept 8. Complete the square: x 2 + 6 x + ____ . CORRECT: 9

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9. Factor x 2 – 6 x + 8.
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Unformatted text preview: • CORRECT: ( x – 4)( x – 2) 10. Identify the vertex and the axis of symmetry of the parabola. • CORRECT: vertex: ( , ); axis of symmetry: x = 11. Graph y = – x 2 – 1. • CORRECT: 12. Find the absolute value of |–1 + 3 i |. • CORRECT: 13. Solve 4 x 2 = 28 by finding square roots. • CORRECT: ± ≈ ±2.65 14. Solve 7 x 2 + 28 x = 49 by completing the square. • CORRECT: –2 ± 15. Solve x 2 + 6 x – 2 = 0 by completing the square. • CORRECT: –3 ± 16. Solve 2 x 2 – 3 x – 5 = 0 by factoring. • CORRECT: , –1 17. Use the GCF to factor 15 x 2 + 6 x . • CORRECT: 3 x (5 x + 2) 18. Factor f 2 – 12 f + 36. • CORRECT: ( f – 6) 2 19. Solve x 2 + 8 x – 2 = 0 by completing the square. • CORRECT: –4 ± 3 20. Solve 9 x 2 + 16 = 0. Check your answer(s). • CORRECT: – i , i You got 19 out of 20 correct....
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Chapter Test - • CORRECT x – 4 x – 2 10 Identify the...

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