Two whole numbers A and B satisfy the following conditions. Find A and B. A−B=18
A:B is equivalent to 11:5.

Jack is considering a list of features and fees for denver bank. jack plans on using network atms about 4 times per month. what would be jack’s total estimated annual fees for a checking account with direct paycheck deposit, one overdraft per year, and no 2nd copies of statements?

How to do this , and can some one explain

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