How can i solve for x: 64=16 x^2

1. there are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. the first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%. the line plot shows the differences after 10 rerandomizations. determine whether the difference in the means of the two groups is significant based on the line plot. explain your answer.

Iwill make brain if you me correctly fill this out needs due today pls and send it back to me (click the link and you will get it)

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u