1. The fourth term of an arithmetic sequence is 9.6 and the ninth term is 15.6. Find the sum of the first nine terms.

Bob’s bank charges him a $3.15 service fee every time he uses an out-of-network atm. if bob uses an out-of-network atm an average of three times every two weeks, how much will he pay in service fees over the course of a year? a. $327.60 b. $109.20 c. $491.40 d. $245.70 select the best answer from the choices provided a b c d

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39