Express the following as a fraction in its simplest form. 1. h+f/3 - f+k/2 + 4h-k/5
plz answer this question

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

Can someone me with this problem . show your work .

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%