Answer:
The answer should be 93.
Explanation:
So this took a lot of work to figure out, I did not solve it normally.
What i first did was add 75, 80, and 92 to get = 247. 247/3 was only 82, but in the equation you said the score on her next quiz, which means I would need to divide by 4.
But that was not possible with the numbers I had.
i started adding numbers to see if I would get the mean of 85, and eventually I added 93. to get 340, which I divided by 4 (the number of quizzes that were taken) to get the mean of 85.
so yeah, I made it more complicated than it need to be, but that's the answer lol
-your very overworked friend who went to great extent to solve this problem,
Azalea