Sarah adds 3 to it, then doubles it and gets an answer of 52.4. What was the original number?

The reflexive property of congruence lets you say that ∠pqr ≅

Can someone me out here number 4 plz

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