If a=3 and b=5, what is the value of 3a + b to the power of 2?

One integer is 8 times another. if the product is 72, then find the integers

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

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