3 of these scores are for Cyprian.
His scores must add up to 180 for the mean to be 90.
His scores must be 85, 92 and 94.
The remaining values add to 278/3 = 92.6 recurring, round as needed.
maybe show the method with a different set of values
thanks, I like both of these methods, I struggle with this topic so I will change the numbers and use both to see what I like better, I will post later asking if it is right or not.
I understand now, thank youuu
I would guess that it prevents spam
when you post a question or answer there should be an image icon in the toolbar, click that then upload image choose the file and click I'm not a robot and it should appear.
where do the points cross and how many solutions are there?
means confidence interval
whats your calculator model?
complete the square for the LHS, therefore (x-5)(x+3)
so x≤-3 or x≥5