Grade 9 (Math Day Competition)

40 | Total Attempts: 36

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Grade 9 (Math Day Competition)

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Questions and Answers
  • 1. 
    The gradient of a line through the points O and A(3, 1) is ...
    • A. 

      –3

    • B. 

      3

  • 2. 
    Which inverse operation should be applied first to solve 3x + 5 = 10?
    • A. 

      Addition

    • B. 

      Subtraction

    • C. 

      Division

    • D. 

      Multiplication

  • 3. 
    Solve 5x + 3 =  23
    • A. 

      X = 5.2

    • B. 

      X = 20

    • C. 

      X = 4

    • D. 

      X = 6

  • 4. 
    Solve   x/5 + 2 = 7
    • A. 

      X = 25

    • B. 

      X = 45

    • C. 

      X = 1

    • D. 

      X = 5

  • 5. 
    Write an equation for the following problem, "Half of a number minus 6 is 20"
    • A. 

      (x - 6) / 2 = 20

    • B. 

      X - 6 = 20

    • C. 

      2x - 6 = 20

    • D. 

      X/2 - 6 = 20

  • 6. 
    The equation C = 2.5p + 75 can be used to represent the cost, C to rent the rollar skating rink when p attend.  How much will it cost if 100 people attend.
    • A. 

      $250

    • B. 

      $325

    • C. 

      $75

    • D. 

      $175

  • 7. 
    The equation P=2L + 2W can be used tp fomd the perimeter of a rectangle.  A rectangular shaped playground is enclosed by a fence that is 500m.  The length of the playground is 120m.  Use the equation to determine the width of the playground.
    • A. 

      190m

    • B. 

      260m

    • C. 

      180m

    • D. 

      130m

  • 8. 
    The equation C = 10 + 0.25m represents the cost, C of a cell phone bill if m minutes are used.  Which equation represents a bill of $25?
    • A. 

      25 = 10 + 0.25m

    • B. 

      C = 10 + 0.25(25)

    • C. 

      C = 10 + 25

    • D. 

      25 = 0.25m

  • 9. 
    Solve x/4 + 6= 9
    • A. 

      X = 4

    • B. 

      X = 0.5

    • C. 

      X = 60

    • D. 

      X = 12

  • 10. 
    Which inverse operation should be applied first to solve 5 - 3e = 15
    • A. 

      Addition

    • B. 

      Subtraction

    • C. 

      Multiplication

    • D. 

      Division

  • 11. 
    Solve  (x - 3) / 5 = 10
    • A. 

      X = 13

    • B. 

      X = 65

    • C. 

      X = 53

    • D. 

      X = 47

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