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Don't really understand this question
by Renitha R Junior Cert Mathematics — 12/10/16 7

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


7 Comments
Adithi — 10/10/16
x+y=40 5x-3y=56 3x+3y=120 5x-3y=56 8x=176 x=22 (22)+y=40 y=40-22 y=18
Renitha R — 11/10/16
I know the answer but why is it 5x-3y @adithi
EA01 — 11/10/16
I hate algebra so much
Renitha R — 11/10/16
@ea01 omg same
Adithi — 11/10/16
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)
niallsheedy — 11/10/16
X represents the number of questions he got right and y represents the number of questions he got wrong
Renitha R — 12/10/16
Thanks sm
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