First, find the value for x: then, find the measure of each angle

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

How to do this , and can some one explain

Asurvey of 45 teens found that they spent an average of 25.6 hours per week in front of a screen (television, computer, tablet, phone, based on the survey’s sample mean, which value could be the population mean? 2.3 hours 27.4 hours 75.3 hours 41.5 hours