Write an expression for the calculation subtract 12 doubled from 132

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Which one is the correct answer, and why?

Amayoral candidate would like to know her residents’ views on a tax on sugar drinks before the mayoral debates. she asks one thousand registered voters from both parties. these voters are an example of a census population convenience sample simple random sample