There are 45 questions in a Mathematics quizbee. For every correct answer, 5 marks are awarded and 3 marks for every wrong answer. If sofia scored 185 points, how many questions did she answer wrongly.

Answer 1

45=R+W

5R+3W=185

Are you certain on the getting 3 marks for every wrong answer? That is an odd way of scoring a math quiz.

R=45-W
5(45-W)+3W=185
225-5W+3W=185
-2W=-40
W=20