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Daniel [21]
3 years ago
5

Bobby-Joe takes a 25-question test for which he receives 4 points for each correct answer and loses 1 point for each wrong answe

r. If Bobby-Joe answers all the questions and gets a passing grade of 65%, how many questions did he get right?
Mathematics
2 answers:
Arada [10]3 years ago
4 0

<em>Answer: </em>

<em>Let x be the number of questions he gets right. Let y be the number of questions he gets wrong. </em>

<em>Then: </em>

<em>x + y = 25</em>

<em>4x - 1y = 65 </em>

<em>Adding these two equations gives: </em>

<em>5x = 90 </em>

<h2><em>x = 90/5 = 18 right answers </em></h2>

<em>y = 25 - 18 = 7 wrong answers</em>

<em>* Hopefully this helps:) Mark me the brainliest:)!!!</em>

<em>~ 234483279c20~</em>

7nadin3 [17]3 years ago
3 0

7 wrong answers, and 18 right answers

x+y=25

4x-1y=65

add the two equations to cancel out the y

5x=90

x=18

18 right answers.

25-18=7 wrong answers.

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