:( a party rental company has chairs and tables for rent. the total cost to rent 7 chairs and 9 tables is $91. the total cost to rent 5 chairs and 3 tables is $35. what is the cost to rent each chair and each table?

Find the given elements if matrix d:

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

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%