Which expression is equivalent to the given expression? 5x-2

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

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?