Two friends are playing the same game on their phones. One is already on level 6, and levels up every two hours. Her friend is on level 3, but levels up every
60 minutes. After how many hours will they have reached the same level? What
level will that be?
Write a system of linear equations

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0