What is 16/1/9+-4/2/3? helppp

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Will give brainliest immeadeately true or false: the origin woud be included in the solution set for the inequality: y< 2x-5