Question

Michaela's quiz scores for this Math trimester are listed belo. What is the minimum score that Michalea needs on her last quiz for her for her mean quiz grade to be an 85%or above?

72%, 77%, 84%, 86%, 92%, 94%

Answer 1

[AI-generated answer — Bot GPT 3.5]

To find the minimum score Michaela needs on her last quiz, we can set up the following equation:

(72 + 77 + 84 + 86 + 92 + 94 + x) / 7 = 85

Where x is the score on her last quiz.

Solving for x:

(505 + x) / 7 = 85
505 + x = 595
x = 90

Therefore, Michaela needs to score a minimum of 90% on her last quiz for her mean quiz grade to be an 85% or above.