Identify the equivalent expressions of 4(2x +x-3) -3x +3 by substituting x=2 and x=3

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%

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

Tom travels between the two mile markers shown and then finds his average speed in miles per hour. select the three equations that represent this situation.