What is g(x)? I really need some help with this. Help me out, guys!

The birth weights of newborn babies in the unites states follow in a normal distrubution with a mean of 3.4 kg and standard deviation of 0.6 kg. reaserches interested in studying how. children gain weights decide to take random samples of 100 newborn babies and calculate the sample mean birth weights for each sample

Find the value of the variable and the length of each chord for #5 and #6.

If f(x) = 3x-2 and g(x) =2x+1 find (f-g)(x)