HELP! Number 13 please! Any other help would be amazing too.

Without graphing the linear functions, find the coordinates of the point of intersection of their graphs: y=3x−11 and y=4

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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?