Which data set has the greatest spread for the middle 50% of its data?
a.
{18, 13, 22, 17, 21, 24}
b.
{17, 19, 22, 26, 17, 14}
c.
{13, 17, 12, 21, 18, 20}
d.
{18, 21, 16, 22, 24, 15}
i need more it's confusing a little bit

Consider 6x2 + 6x + 1. which term immediately tells you that this expression is not a perfect square trinomial? justify your answer

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =