Find the value of x, please help

Nnnnneeedd 1.find the residual if you know the actual number is 5.2 and the predicted value is 4.8

Nell has a sales clerk job that pays $12 per hour for regular gas work hours. she gets double time for any hours over 40 that she works in a week. how many hours did nell work if her weekly pay was $744

Although changes result from business transactions, the equality of the fundamental bookkeeping equation must remain. t/f