Who killed Mr PEMDAS?

Five more than the product of a number n and 8 is at least 100. write an inequality that can be used to find all positive values of n

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

The holiday party will cost $160 if 8 people attend. if there are 40 people who attend the party, how much will the holiday party cost