A scuba diver was studying some fish at -10 feet in the ocean. He dove down another 9 feet each hour after that. If he was down in the water for 3 hours, how far down was he at the end of the 3 hours?

Perform the indicated operation. 8/a - 6/a + 7/a

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.

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6