emily757922
contestada

In a quiz contest, 4 marks were awarded for a correct answer and -2 marks were given for an incorrect answer. If James gave 5 incorrect answers and scored 30 marks, find the number of correct answers given by him.

please help me​

Respuesta :

sqdancefan

9514 1404 393

Answer:

  10

Step-by-step explanation:

For c correct answers and 5 incorrect answers, James's score is ...

  4c -2(5) = 30

  4c = 40 . . . . . . add 10

  c = 10 . . . . . . . . divide by 4

James gave 10 correct answers.

MaryElizabethW615

Answer:

10, James got 10 correct answers.

Step-by-step explanation:

1 incorrect answer=-2 marks

5 incorrect answer=-10 marks

1 correct answer=4 marks

James has -10 marks for incorrect answers and James has 40 marks for correct answers. Because 10+30=40.

So James got 10 out of 15 answers correct.

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