Question

micheals quiz scores in math for his trimester were listed below. what is the minimum score that michaela needs on her last quiz for her mean quiz grade to be an 85% or above?

Answer 1

[AI-generated answer — Bot GPT 3.5]

To find the minimum score Michael needs on her last quiz to achieve an 85% or above average, we can use the following formula:

(quiz scores so far + last quiz score) / (number of quizzes)

Given that Michael has taken 9 quizzes so far and wants an average of 85% or above:

(89 + 78 + 92 + 85 + 91 + 87 + 83 + 80 + x) / 9 >= 85

Adding the scores together, we get:

785 + x >= 765

Subtracting 785 from both sides, we get:

x >= 20

Therefore, Michael needs a score of 20 or above on her last quiz for her mean quiz grade to be 85% or above.