Midterm+Review+Answers

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Midterm is scheduled for Thursday, January 20th. My computer here at home doesn't have a math type program, so equations won't look like equations.
 * Answers to the midterm review.**

1. - 8x squared + 14x - 11 1a. (Not related to number 1 - need the added info of a = 2.) y = 2(x - 2)squared - 50 2. y = (3/8)x + (12/8) 3. $80.00 4. 2x2 matrix where the top left entry = 3/18, top right entry = - 5/18, bottom left entry = 0, bottom right entry = - 6/18 5. (2, - 23) 6. a. y = 2x squared b. y = absolute value of (x - 4) c. y = 2x + 7 d. y = 5 x-cubed 7. x > 3.25 or x < -1.75 8. (2x + 3)(3x - 5) 9. y = 3x - 1 10. A 11. y = absolute value of (x - 5) + 2 12. 2x - 3y = 6 13. a. negative 47 b. 2 imaginary roots, no x-intercepts 14. -1< x <1 15. y = absolute value of (x - 4) 16. y = 2 - (1/2)X 17. f(3) = 24, f(-1) = -2 18. Points that are solutions (-11, -4) AND (-25, -10), Points that are NOT solutions (0, 2) AND (5, 0). 19. y = (x + 3)(x - 2) 20. x = 4 + or - square root of 3... all over 2 21. 46 22. 4 units to the right and 3 units up 23. f(x) = {x + 2 if x< or equal to -1 {x squared if -1< x < or equal to 1 {3 if x > 1 24. x = - 5, - 1 25. D 26. The two matrices should be equal - the top right matrix is messed up (my fault), but if you set the other entries equal... x = 2.132, -2.532 and y = - 30/13 27. x = .405, 6.595 28. (-6, -6) 29. y = - x - 1 30. No solutions - the lines are parallel - same slope, different y-intercept 31. y = (5/9)(x + 2) squared - 3 32. x < -2 or x > 10 33. 22 34. ( -27, -17) 35. y = (-4/3)x + 20/3 36. (6, 17)... if 6 units were produced, both positions would pay $17.00 37. 7 first place finishers, 10 second place finishers, 3 third place finishers 38. 156 people went to the fall formal, 229 people went to the spring fling, 311 people went to the end-of-the-year extravaganza 39. A = 3 x-squared, c) 6.45, d) 6.32, f) 27... so yes 40. At 2 seconds, the rocket ball will reach the maximum height of 9 feet. After 5 seconds, the ball will be back to the ground.