How do i right a word problem for -84 divided by 3

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.

5/6+7/8what is the answer sealsdbdbshd

Find the domain of the following expression: 1/(√x)-2