Question

Marna is playing a game where you score -5 points each time you guess the correct answer. The goal is to get the lowest score. To win the game, Marna must have a score less than -80 points. How many correct answers does Marna need to win the game?

Answer 1

Marna needs to answer correctly 17 times.

Explanation:

-5 * 17 = -85, anything lower won't work.

Answer 2

She needs 17 correct answers.

Explanation:

Givens

• You score -5 points each time you guess the correct answer.
• Marna must have a score less than -80 points to win.

Now, let's be
`x` the total number of correct answers. If you score -5 points per correct answer, that means
`-5x`.

So, we know that Marna must score LESS THAN -80 points, that can be expressed as

`-5x=-80\\x=16`

Therefore, Marna need 17 correct answer to win the game. Remember that she needs less than -80 points, so with 16 answer she's gonna get barely -80, which is not enough to win the game.