Package a weights 5 1/2 pounds b weights 1 1/4 pounds. find the average weight of the two packages

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

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?

To start to solve the system of equations below, which number would you multiply in the equation -2x-5y=-1? the two equations are -2x-5y=-1 and 4x+2y=8