Thirty-one is six less than triple a number

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

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c =