PLEASE HELP ME ASAP First to answer will get brainliest answer. I need help solving A, B, C, and D!!!

Can someone explain the elimination method to me for this problem?

If f(x) = 4x – 3 and g(x) = 8x + 2, find each function value a.f[g(3)] b.g[f(5)] c.g{f[g(-4)]}

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500