Kira worked 87/100 of the problems on her math test in the first hour.
after the second hour, she had worked 97/100 of the problems.

what fraction of the problems did she work in the second hour?

Pete is making decorations for a dinner party. the instructions tell him to use 9 flowers for a medium-sized decoration. complete each statement to adjust the flowers for different-sized decorations based on these instructions.

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.

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.