Math 0305 Review for Final Exam Evaluate using order of operations. 1. 8 – │4 – 6 ∙ 4│ + (-8)2 ÷ 82 2. -2 + 32 – (-8) 2–4+7 Evaluate the expression using the given values. 3. __x2___ ; x = -1, y = -3, z = -5 2z + y Solve. 4. 7y – 2(y – 7) = 11y – (7y +10) Solve the equation for the indicated variable. 5. x=w+y+z ;y 2 Solve the problem. 6. The perimeter of a rectangular garden is to be 54 ft. Find the length if the width is 10ft. (Use P = 2L + 2W) Solve. 7. 4(2z – 5) = 7(z + 2) Add. 8. 5 1 3 12 6 12 7 x 9. Solve for the missing number. 10. A car travels 808 km in 12 days. At this rate, how far would it travel in 24 days? 11. The sum of three consecutive even integers is 168. Find the integers. 12. Paul left Springfield traveling north at an average speed of 60 miles per hour. Two hours later, Tim left Springfield traveling south at an average speed of 63 miles per hour. How long will it take after Paul left for them to be 489 mile apart? 13. Bill invests in a plan that has an APR of 3%. He invests five times as much in a plan that has an APR of 6%. If the total interest from the investments is $825 after one year, how much was invested in the plan earning 3% interest? 11 ) is a solution to the equation 8 x 5 y 19. Why or why not? Determine whether the order pair (1, 5 Use the graph of the function f below to find f(1). 14. 15. Revised: Mar 12, 2008 Page 1 687304668 16. Find the y-intercept and the x-intercept for the equation y 4 x 5. 17. Is the graph below a function? Explain why or why not. 18. Subtract. (Simplify your answer) (2x 3 5x 2 3) (10x 2 3x 10) 19. Multiply. (Simplify your answer) (7x 4 y 2 )(8x3 y 4 ) 20. Multiply. (Simplify your answer) ( x 5)(2x 2 6x 3) 21. Multiply. (Simplify your answer) (2 x 5)( 3 x 4) 22. Multiply. (Simplify your answer) (5x 12)2 23. Multiply. (Simplify your answer) 2x 3 y (3x 3 4xy 2 5y 3 ) 24. Divide. (Simplify your answer.) 18 x 7 12 x 3 24 x 3x 25. Divide. (Simplify your answer.) (5a3 18a2 8a 3) (a 3) 26. Simplify. (Write exponential notation with positive exponents.) (4x 3 y 2 )4 Factor Completely. 27. x 3 5 x 2 10 x 50 28. x2 + 7x - 30 29. x2 - 3xy - 10 y2 30. 4 x2 + 12x + 9 31. 20z2 - 7z - 6 32. 36x2 - 49 Revised: Mar 12, 2008 Page 2 687304668 33. d3 + 64 34. 25x - 4 x Solve. 35. 3 50n2 + 20n = 0 36. x 2 2 x 48 0 37. Find every value of the variable that makes the expression undefined. 38. Simplify: x5 2x 6 2 x 2 2 x 60 x 2 8 x 15 Perform the indicated operation. 39. y 2 13 y 42 y 2 49 11y 22 5 y 10 41. 5 4 x6 x3 40. 5 3 a 2 a 1 43. 2y 1 3 4 2 y 4 y2 y2 Solve. 42. x2 x3 x 1 x 6 3 3 a a3 5 1 a a3 44. Simplify. 45. A pool can be filled with one pipe in 8 hours, whereas a second pipe requires 20 hours to fill the pool. How long will it take to fill the pool with both pipes turned on? 46. A jet can fly 550 mph in calm air. Traveling with the wind, the plane can fly 2400 miles in the same amount of time it takes to fly 2000 miles against the wind. Find the rate of the wind. Revised: Mar 12, 2008 Page 3 687304668 MATH 0305 Review **Answer Key** 1. -11 2. 3 1 3. 13 4. -24 5. y 2 x w z 6. 17 ft 7. 34 7 8. 4 9. -14 24. 6 x 6 4 x 2 8 25. 5a 2 3a 1 y8 26. 256 x12 27. ( x 5)( x 2 10) 28. ( x 10)( x 3) 29. ( x 5 y )( x 2 y ) 30. (2 x 3)(2 x 3) 10. 1616 km 11. 54, 56, 58 33. (d 4)(d 2 4d 16) 34. x(5 2 x)(5 2 x) 2 35. ,0 5 36. -8, 6 37. 3 2( x 6) 38. x3 5( y 6) 39. 11( y 7) 8a 1 40. (a 2)(a 1) x 39 41. ( x 6)( x 3) 3 42. 2 43. -5 3 44. 2a 5 5 45. 5 hr 7 46. 50 mph 31. (4 z 3)(5 z 2) 32. (6 x 7)(6 x 7) 12. 5 hr 13. $2500 14. yes, makes a True statement 15. 5 16. (0,5), ( 5 , 0) 4 17. it is a function; each x-value has a unique y-value 18. 2 x3 15 x 2 3x 13 19. 56x 7 y 6 20. 2 x3 4 x 2 27 x 15 21. 6 x 2 23x 20 22. 25 x 2 120 x 144 23. 6 x6 y 8x 4 y3 10 x3 y 4 Revised: Mar 12, 2008 Page 4 687304668