Factor the expression x^4 -1 using the polynomial identify x^2-y^2)=(x-y)(x+y)

Anew movie is released each year for 14 years to go along with a popular book series. each movie is 2 minutes longer than the last to go along with a plot twist. the first movie is 70 minutes long. use an arithmetic series formula to determine the total length of all 14 movies

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220

Lisette takes an ela exam and got 16 out of 27 questions correct. what percentage of the questions did lisette get correct?