Two cooks purchased plates and cups at the same store. the first cook bought 4 plates and 5 cups for a total of $25.25. the second cook bought 7 plates and 3 cups for a total of $25.50. what is the price of a plate?

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%

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

Technicians have installed a center pivot, circular irrigator for a farm that covers 25 acres. a.) how long is the irrigation boom (in feet) from the center pivot to its farthest extent? b.) if the irrigation boom makes 4 full revolutions in a day, how many miles does the end of the boom travel in 5 days?