The range of this data is 65 since the minimum is 20 and the maximum is 85(if its counting by 5s) then you just subtract and you have the range.
878/3 is 28 with a remainder of 10! The error is when they subtracted 258-248 wrong
Thannnnnnnnk yooooooouuuuuuu
AB + C
= (x + 1)(x^2 + 2x - 1) + 2x
= x^3 + 2x^2 - x + x^2 + 2x - 1 + 2x
= x^3 + 3x^2 + 3x - 1
