Yall help im grade 8 linear equations plzz its due todayyy

1. what are the missing reasons in the proof 2. it's in the second picture and 3

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?