A plane flew from Smithtown to Johnsville and back. The duration of the trip there was 1 hour less than the duration of the trip back. The average speed on the trip there was 240 mph. The average speed on the trip back was 220 mph. How many hours did the trip take?

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Which value of y will make the inequality y< -1 false?

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x