SOMEONE JUSt please HELP ME HELP ME PLEASE ITS URGENT

Three times the sum of a number and seven is negative thirty-six. what is the number?

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

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years