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  • avatar image

    Don't really understand this question Renitha R

    An examination paper consists of 40 questions

    5 marks are given for every correct answer

    3 marks are deducted for every wrong answer

    Kenny answered all of the questions and got x correct and y incorrect

    His total score for the examination was 56 marks

    I) Write 2 equations to represent the info above

    2)Solve the equation to find out how many kenny answered correctly

    1. avatar image

      Adithi

      x+y=40

      5x-3y=56

      3x+3y=120

      5x-3y=56

      8x=176

      x=22

      (22)+y=40

      y=40-22

      y=18

    2. avatar image

      Renitha R

      I know the answer but why is it 5x-3y @adithi

    3. avatar image

      EA01

      I hate algebra so much

    4. avatar image

      Renitha R

      @ea01 omg same

    5. avatar image

      Adithi

      We know that kenny got 56 marks in his test. Every time he gets an answer right he gets 5 marks and every time he gets an answer wrong, he loses 3 marks. His result of 56 marks is all the marks for the questions he got right so (x*5). And then you have to take away the marks he loses because he got a question wrong so that is (3*y)

    6. avatar image

      niallsheedy

      X represents the number of questions he got right and y represents the number of questions he got wrong

    7. avatar image

      Renitha R

      Thanks sm

    8. avatar image

      Me

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