28 January, 19:00
You score an 86 on the first of two exams. Write and solve an equation to find the score x that you need on the second exam to have a mean score of 90.
28 January, 19:45
I haven't touched on mean, mode, medium, and range in a little while so I could be wrong, but if (mean) means average, i think average is adding 2 grades together then dividing the number of exams, so the average needs to be 90, so what I did was i found the difference between the original grade on the first exam, so 90-86=4, so i guessed at 94 being the next grade needed. (86+94) / 2=90. 86+94=180 then divide 180 by 2 and it equals 90. so yeah your answer is 94.
28 January, 20:25
Okay so the answer will be 94%.
Here is the easiest way:
What is 90-86?
Now add that to the mean you want (90)
So it is 94%
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» You score an 86 on the first of two exams. Write and solve an equation to find the score x that you need on the second exam to have a mean score of 90.