Please help me What does Y equal and X equal DO NOT GIVE ME THAT ANNOYING LINK OR I WILL TRY TO BAN YOU :)

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia

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%

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)