Answer: Marna has to answer more than 16 answers to win the game.
Step-by-step explanation:
Le 'x' be the number of correct answers.
If Marna is getting -5 points each time she guess the correct answer.
Then the total points she get after x correct answers= -5x
If to win the game, Marna must have a score of less than -80 points.
⇒[tex]-5x<-80[/tex]
If we multiply (-1) on both sides the inequality will reverse
[tex]5x>80[/tex]
Divide both sides by 5, we get
[tex]x>16[/tex]
Marna has to answer more than 16 answers to win the game.